GHSA-9M43-P3CX-W8J5

Vulnerability from github – Published: 2026-01-29 22:04 – Updated: 2026-01-29 22:04
VLAI?
Summary
malcontent OCI image pull credential exfiltration via malicious registry token realm
Details

Malcontent could be made to expose Docker registry credentials if it scanned a specially crafted OCI image reference. Malcontent uses google/go-containerregistry for OCI image pulls, which by default uses the Docker credential keychain. A malicious registry could return a WWW-Authenticate header redirecting token authentication to an attacker-controlled endpoint, causing credentials to be sent to that endpoint.

Fix: Default to anonymous auth for OCI pulls

Acknowledgements

Thank you to Oleh Konko from 1seal for discovering and reporting this issue.

Severity ?
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/chainguard-dev/malcontent"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.10.0"
            },
            {
              "fixed": "1.20.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-24845"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-522"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-29T22:04:24Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "Malcontent could be made to expose Docker registry credentials if it scanned a specially crafted OCI image reference. Malcontent uses [google/go-containerregistry](https://github.com/google/go-containerregistry) for OCI image pulls, which by default uses the Docker credential keychain. A malicious registry could return a `WWW-Authenticate` header redirecting token authentication to an attacker-controlled endpoint, causing credentials to be sent to that endpoint.\n\n**Fix:** [Default to anonymous auth for OCI pulls](https://github.com/chainguard-dev/malcontent/commit/538ed00cdc639d687a4bd1e843a2be0428a3b3e7)\n\n**Acknowledgements**\n\nThank you to Oleh Konko from [1seal](https://1seal.org/) for discovering and reporting this issue.",
  "id": "GHSA-9m43-p3cx-w8j5",
  "modified": "2026-01-29T22:04:24Z",
  "published": "2026-01-29T22:04:24Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/malcontent/security/advisories/GHSA-9m43-p3cx-w8j5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/chainguard-dev/malcontent/commit/538ed00cdc639d687a4bd1e843a2be0428a3b3e7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/chainguard-dev/malcontent"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "malcontent OCI image pull credential exfiltration via malicious registry token realm"
}


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