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CVE-2026-25122

Estado: AnalizadaMedia (5.5)—

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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Chainguard — Apko

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-25122",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-25122",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-04T19:19:20.825588Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "chainguard-dev",
          "product": "apko",
          "versions": [
            {
              "status": "affected",
              "version": ">= 0.14.8, < 1.1.0"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-02-04T19:16:14.960",
  "references": [
    {
      "url": "https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09",
      "tags": [
        "Patch"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "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 imágenes de contenedor OCI construidas a partir de paquetes apk. Desde la versión 0.14.8 hasta antes de la 1.1.0, expandapk.Split drena el primer flujo gzip de un archivo APK a través de io.Copy(io.Discard, gzi) sin límites explícitos. Con un flujo de entrada controlado por un atacante, esto puede forzar un gran trabajo de descompresión gzip y llevar al agotamiento de recursos (impacto en la disponibilidad). La función Split lee la primera cabecera tar, luego drena el resto del flujo gzip leyendo directamente del lector gzip sin ningún límite máximo de bytes descomprimidos o tope de relación de descompresión. 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 ralentización del proceso. Este problema ha sido parcheado en la versión 1.1.0."
    }
  ],
  "lastModified": "2026-06-17T10:24:08.763",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:chainguard:apko:*:*:*:*:*:go:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D977E504-C3B8-403B-8277-A1A4A2DAB907",
              "versionEndExcluding": "1.1.0",
              "versionStartIncluding": "0.14.8"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}