CVE-2026-54174

Status: DeferredHigh (8.3)—

melange allows users to build apk packages using declarative pipelines. Apko prior to version 1.2.9, corresponding to melange prior to version 0.50.4, verified the control section hash (`.PKGINFO` etc.) against the signed `APKINDEX`, but never verified the data section hash (the actual package files that get installed). An attacker who could compromise a mirror, poison a cache, or MITM a package fetch could substitute arbitrary file contents while the control hash check still passed. Apko version 1.2.9 and melange version 0.50.4 contain a fix.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Base score: 8.3

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.15%
Percentile among all scored CVEs: 4
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1195 Supply Chain Compromiseinitial access75 %
Primary impactT1565.002 Transmitted Data Manipulationimpact80 %
Secondary impactT1036.005 Match Legitimate Resource Name or Locationstealth70 %

Ataque en cadena de suministro (mirror/cache comprometidos) que sustituye contenido de paquetes; no es interacción del usuario sino envío de paquete manipulado. Resultado: manipulación de datos instalados y posible ofuscación de cambios.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Application Developer Guidance Vulnerability Scanning User Account Management Restrict File and Directory Permissions Limit Software Installation Execution Prevention

Affected technologies (2)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Chainguard — Apko^AI Chainguard — Melange^AI

CWEs

CWE-345, CWE-354

References

https://github.com/chainguard-dev/melange/security/advisories/GHSA-fpg8-7664-jc5q

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-54174",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-54174",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-14T16:18:49.717621Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 8.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "chainguard-dev",
          "product": "melange",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.50.4"
            }
          ]
        },
        {
          "vendor": "chainguard-dev",
          "product": "apko",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.2.9"
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  ],
  "published": "2026-09-11T21:17:11.403",
  "references": [
    {
      "url": "https://github.com/chainguard-dev/melange/security/advisories/GHSA-fpg8-7664-jc5q",
      "source": "security-advisories@github.com"
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  "vulnStatus": "Deferred",
  "weaknesses": [
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      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-345"
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          "lang": "en",
          "value": "CWE-354"
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  "descriptions": [
    {
      "lang": "en",
      "value": "melange allows users to build apk packages using declarative pipelines. Apko prior to version 1.2.9, corresponding to melange prior to version 0.50.4, verified the control section hash (`.PKGINFO` etc.) against the signed `APKINDEX`, but never verified the data section hash (the actual package files that get installed). An attacker who could compromise a mirror, poison a cache, or MITM a package fetch could substitute arbitrary file contents while the control hash check still passed. Apko version 1.2.9 and melange version 0.50.4 contain a fix."
    }
  ],
  "lastModified": "2026-09-30T19:57:08.043",
  "sourceIdentifier": "security-advisories@github.com"
}