Vulnerability-Lookup

CVE-2026-24734 (GCVE-0-2026-24734)

Vulnerability from cvelistv5 – Published: 2026-02-17 18:53 – Updated: 2026-02-17 18:53

Title

Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass

Summary

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. This issue affects Apache Tomcat Native: from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114. The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected. Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue. Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.

Severity ?

No CVSS data available.

CWE

CWE-20 - Improper Input Validation

Assigner

apache

References

URL

Tags

https://lists.apache.org/thread/292dlmx3fz1888v6v…

vendor-advisory

Impacted products

Vendor

Product

Version

Apache Software Foundation

Apache Tomcat Native

Affected: 1.1.23 , ≤ 1.1.34 (semver)
Affected: 1.2.0 , ≤ 1.2.39 (semver)
Affected: 1.3.0 , ≤ 1.3.4 (semver)
Affected: 2.0.0 , ≤ 2.0.11 (semver)

Apache Software Foundation

Apache Tomcat

Affected: 11.0.0-M1 , ≤ 11.0.17 (semver)
Affected: 10.1.0-M7 , ≤ 10.1.51 (semver)
Affected: 9.0.83 , ≤ 9.0.114 (semver)
Unaffected: 0 , ≤ 8.5.100 (semver)

Credits

Joshua Rogers (@MegaManSec)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache Tomcat Native",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "1.1.34",
              "status": "affected",
              "version": "1.1.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "1.2.39",
              "status": "affected",
              "version": "1.2.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "1.3.4",
              "status": "affected",
              "version": "1.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "2.0.11",
              "status": "affected",
              "version": "2.0.0",
              "versionType": "semver"
            }
          ]
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        {
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          "product": "Apache Tomcat",
          "vendor": "Apache Software Foundation",
          "versions": [
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              "status": "affected",
              "version": "11.0.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.1.51",
              "status": "affected",
              "version": "10.1.0-M7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.0.114",
              "status": "affected",
              "version": "9.0.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.100",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Joshua Rogers (@MegaManSec)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eImproper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\u003c/p\u003e\u003cp\u003eWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Tomcat Native:\u0026nbsp; from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThe following versions were EOL at the time the CVE was created but are \nknown to be affected: \u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003efrom 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u0026nbsp;Older EOL versions are not affected.\u003c/span\u003e\u003c/p\u003e\u003cp\u003eApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\u003c/p\u003eApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.\u003cbr\u003e"
            }
          ],
          "value": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "text": "moderate"
            },
            "type": "Textual description of severity"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-17T18:53:12.228Z",
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "apache",
    "cveId": "CVE-2026-24734",
    "datePublished": "2026-02-17T18:53:12.228Z",
    "dateReserved": "2026-01-26T14:20:56.965Z",
    "dateUpdated": "2026-02-17T18:53:12.228Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-MGP5-RV84-W37Q

Vulnerability from github – Published: 2026-02-17 21:31 – Updated: 2026-02-17 21:31

Details

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.

When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.

This issue affects Apache Tomcat Native: from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.

The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected.

Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.

Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-24734"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-17T19:21:56Z",
    "severity": null
  },
  "details": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.",
  "id": "GHSA-mgp5-rv84-w37q",
  "modified": "2026-02-17T21:31:13Z",
  "published": "2026-02-17T21:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24734"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

bit-tomcat-2026-24734

Vulnerability from bitnami_vulndb

Published

2026-02-20 09:53

Modified

2026-02-20 10:18

Summary

Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass

Details

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.

The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected.

Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.

Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "tomcat",
        "purl": "pkg:bitnami/tomcat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.83"
            },
            {
              "fixed": "9.0.115"
            },
            {
              "introduced": "10.1.0"
            },
            {
              "fixed": "10.1.52"
            },
            {
              "introduced": "11.0.0"
            },
            {
              "fixed": "11.0.18"
            }
          ],
          "type": "SEMVER"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-24734"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*"
    ],
    "severity": "Unknown"
  },
  "details": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.",
  "id": "BIT-tomcat-2026-24734",
  "modified": "2026-02-20T10:18:37.619Z",
  "published": "2026-02-20T09:53:00.269Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24734"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass"
}

FKIE_CVE-2026-24734

Vulnerability from fkie_nvd - Published: 2026-02-17 19:21 - Updated: 2026-02-18 17:51

Severity ?

Summary

References

	URL	Tags
	security@apache.org	https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de validaci\u00f3n de entrada incorrecta en Apache Tomcat Native, Apache Tomcat.\n\nAl usar un respondedor OCSP, Tomcat Native (y el puerto FFM de Tomcat del c\u00f3digo de Tomcat Native) no complet\u00f3 las verificaciones de verificaci\u00f3n o frescura en la respuesta OCSP, lo que podr\u00eda permitir que se eluda la revocaci\u00f3n del certificado.\n\nEste problema afecta a Apache Tomcat Native: de 1.3.0 a 1.3.4, de 2.0.0 a 2.0.11; Apache Tomcat: de 11.0.0-M1 a 11.0.17, de 10.1.0-M7 a 10.1.51, de 9.0.83 a 9.0.114.\n\nLas siguientes versiones estaban al final de su vida \u00fatil (EOL) en el momento en que se cre\u00f3 el CVE, pero se sabe que est\u00e1n afectadas: de 1.1.23 a 1.1.34, de 1.2.0 a 1.2.39. Las versiones EOL m\u00e1s antiguas no est\u00e1n afectadas.\n\nSe recomienda a los usuarios de Apache Tomcat Native que actualicen a las versiones 1.3.5 o posteriores o 2.0.12 o posteriores, que solucionan el problema.\n\nSe recomienda a los usuarios de Apache Tomcat que actualicen a las versiones 11.0.18 o posteriores, 10.1.52 o posteriores o 9.0.115 o posteriores que solucionan el problema."
    }
  ],
  "id": "CVE-2026-24734",
  "lastModified": "2026-02-18T17:51:53.510",
  "metrics": {},
  "published": "2026-02-17T19:21:56.953",
  "references": [
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "security@apache.org",
      "type": "Primary"
    }
  ]
}

CERTFR-2026-AVI-0181

Vulnerability from certfr_avis - Published: 2026-02-18 - Updated: 2026-02-18

Une vulnérabilité a été découverte dans Apache Tomcat. Elle permet à un attaquant de provoquer un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
Apache	Tomcat	Tomcat versions 11.0.x antérieures à 11.0.18
Apache	Tomcat	Tomcat versions 9.0.x antérieures à 9.0.115
Apache	Tomcat	Tomcat versions 10.1.x antérieures à 10.1.52

References

Title

Publication Time

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-24734 (GCVE-0-2026-24734)

GHSA-MGP5-RV84-W37Q

bit-tomcat-2026-24734

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-24734

CERTFR-2026-AVI-0181

Solutions

Tags

Sightings

Nomenclature