Vulnerability-Lookup

GHSA-CG8J-5CR2-568Q

Vulnerability from github – Published: 2026-02-21 06:30 – Updated: 2026-02-21 06:30

Details

A denial-of-service vulnerability was identified in Moodle’s TeX formula editor. When rendering TeX content using mimetex, insufficient execution time limits could allow specially crafted formulas to consume excessive server resources. An authenticated user could abuse this behavior to degrade performance or cause service interruption.

Severity ?

6.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-26047"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-21T06:17:00Z",
    "severity": "MODERATE"
  },
  "details": "A denial-of-service vulnerability was identified in Moodle\u2019s TeX formula editor. When rendering TeX content using mimetex, insufficient execution time limits could allow specially crafted formulas to consume excessive server resources. An authenticated user could abuse this behavior to degrade performance or cause service interruption.",
  "id": "GHSA-cg8j-5cr2-568q",
  "modified": "2026-02-21T06:30:16Z",
  "published": "2026-02-21T06:30:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26047"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-26047"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2440905"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-26047 (GCVE-0-2026-26047)

Vulnerability from cvelistv5 – Published: 2026-02-21 05:40 – Updated: 2026-02-23 19:30

Title

Moodle: moodle: uncontrolled resource consumption in tex formula editor leading to denial of service

Summary

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

fedora

References

URL

Tags

	https://access.redhat.com/security/cve/CVE-2026-26047	vdb-entryx_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2440905	issue-trackingx_refsource_REDHAT

Impacted products

	Vendor	Product	Version
			Affected: 0 , < 4.5.9 (semver) Affected: 5.0.0 , < 5.0.5 (semver) Affected: 5.1.0 , < 5.1.2 (semver)

Credits

Red Hat would like to thank Aleksey Solovev (Positive Technologies) for reporting this issue.

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-26047",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
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                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-23T19:29:50.672029Z",
                "version": "2.0.3"
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        ],
        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://github.com/moodle/moodle",
          "defaultStatus": "unaffected",
          "packageName": "moodle",
          "versions": [
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        }
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          },
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              "type": "CWE"
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      "providerMetadata": {
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          "time": "2026-02-19T00:00:00.000Z",
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      ],
      "title": "Moodle: moodle: uncontrolled resource consumption in tex formula editor leading to denial of service",
      "x_redhatCweChain": "CWE-400: Uncontrolled Resource Consumption"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
    "assignerShortName": "fedora",
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    "datePublished": "2026-02-21T05:40:11.001Z",
    "dateReserved": "2026-02-10T13:30:03.986Z",
    "dateUpdated": "2026-02-23T19:30:25.686Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

GHSA-CG8J-5CR2-568Q

CVE-2026-26047 (GCVE-0-2026-26047)

Tags

Sightings

Nomenclature