Vulnerability-Lookup

CVE-2026-25122 (GCVE-0-2026-25122)

Vulnerability from cvelistv5 – Published: 2026-02-04 19:02 – Updated: 2026-02-04 19:19

Title

apko is vulnerable to unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams

Summary

apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.0, expandapk.Split drains the first gzip stream of an APK archive via io.Copy(io.Discard, gzi) without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact). The Split function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown. This issue has been patched in version 1.1.0.

Severity ?

5.5 (Medium)


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

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

GitHub_M

References

URL

Tags

	https://github.com/chainguard-dev/apko/security/a…	x_refsource_CONFIRM
	https://github.com/chainguard-dev/apko/commit/2be…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	chainguard-dev	apko	Affected: >= 0.14.8, < 1.1.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-25122",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-04T19:19:20.825588Z",
                "version": "2.0.3"
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          "dateUpdated": "2026-02-04T19:19:35.546Z",
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          "product": "apko",
          "vendor": "chainguard-dev",
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      ],
      "descriptions": [
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          "lang": "en",
          "value": "apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.0, expandapk.Split drains the first gzip stream of an APK archive via io.Copy(io.Discard, gzi) without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact). The Split function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown. This issue has been patched in version 1.1.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-02-04T19:02:15.838Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89"
        },
        {
          "name": "https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09"
        }
      ],
      "source": {
        "advisory": "GHSA-6p9p-q6wh-9j89",
        "discovery": "UNKNOWN"
      },
      "title": "apko is vulnerable to unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-25122",
    "datePublished": "2026-02-04T19:02:15.838Z",
    "dateReserved": "2026-01-29T14:03:42.539Z",
    "dateUpdated": "2026-02-04T19:19:35.546Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
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GHSA-6P9P-Q6WH-9J89

Vulnerability from github – Published: 2026-02-03 23:58 – Updated: 2026-02-04 21:55

Summary

apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams

Details

expandapk.Split drains the first gzip stream of an APK archive via io.Copy(io.Discard, gzi) without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact).

The Split function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown.

Fix: Fixed with 2be3903, Released in v1.1.0.

Acknowledgements

apko thanks Oleh Konko from 1seal for discovering and reporting this issue.

Severity ?

5.5 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "chainguard.dev/apko"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.14.8"
            },
            {
              "fixed": "1.1.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-25122"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-03T23:58:37Z",
    "nvd_published_at": "2026-02-04T19:16:14Z",
    "severity": "MODERATE"
  },
  "details": "`expandapk.Split` drains the first gzip stream of an APK archive via `io.Copy(io.Discard, gzi)` without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact).                                                                                                                      \n                                                                                                                                                                                              \nThe `Split` function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown.             \n                                                                                                                                                                                              \n**Fix:** Fixed with [2be3903](https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09), Released in v1.1.0.                                                  \n                                                                                                                                                                                              \n**Acknowledgements**                                                                                                                                                                        \n                                                                                                                                                                                             \napko thanks Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.",
  "id": "GHSA-6p9p-q6wh-9j89",
  "modified": "2026-02-04T21:55:51Z",
  "published": "2026-02-03T23:58:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-25122"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chainguard-dev/apko"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "apko affected by unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams "
}

FKIE_CVE-2026-25122

Vulnerability from fkie_nvd - Published: 2026-02-04 19:16 - Updated: 2026-02-20 21:31

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09	Patch
	security-advisories@github.com	https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89	Third Party Advisory

Impacted products

	Vendor	Product	Version
	chainguard	apko	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:chainguard:apko:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "D977E504-C3B8-403B-8277-A1A4A2DAB907",
              "versionEndExcluding": "1.1.0",
              "versionStartIncluding": "0.14.8",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.0, expandapk.Split drains the first gzip stream of an APK archive via io.Copy(io.Discard, gzi) without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact). The Split function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown. This issue has been patched in version 1.1.0."
    },
    {
      "lang": "es",
      "value": "apko permite a los usuarios construir y publicar im\u00e1genes de contenedor OCI construidas a partir de paquetes apk. Desde la versi\u00f3n 0.14.8 hasta antes de la 1.1.0, expandapk.Split drena el primer flujo gzip de un archivo APK a trav\u00e9s de io.Copy(io.Discard, gzi) sin l\u00edmites expl\u00edcitos. Con un flujo de entrada controlado por un atacante, esto puede forzar un gran trabajo de descompresi\u00f3n gzip y llevar al agotamiento de recursos (impacto en la disponibilidad). La funci\u00f3n Split lee la primera cabecera tar, luego drena el resto del flujo gzip leyendo directamente del lector gzip sin ning\u00fan l\u00edmite m\u00e1ximo de bytes descomprimidos o tope de relaci\u00f3n de descompresi\u00f3n. Un llamador que analiza flujos APK controlados por un atacante puede verse forzado a gastar un tiempo excesivo de CPU descomprimiendo datos gzip, lo que lleva a tiempos de espera o ralentizaci\u00f3n del proceso. Este problema ha sido parcheado en la versi\u00f3n 1.1.0."
    }
  ],
  "id": "CVE-2026-25122",
  "lastModified": "2026-02-20T21:31:50.767",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-04T19:16:14.960",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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-2026-25122 (GCVE-0-2026-25122)

GHSA-6P9P-Q6WH-9J89

FKIE_CVE-2026-25122

Tags

Sightings

Nomenclature