{
"id": "GHSA-jrm4-4pcf-4763",
"aliases": [
"CVE-2026-44218"
],
"details": "## Summary\n\nThe published `ghcr.io/jo-jo98/ciguard` container image inherits the default root user because the `Dockerfile` lacks a `USER` directive. ciguard is a static analyser with no need for root privileges; running as root inside a container makes any future container-runtime escape CVE more impactful than it needs to be.\n\n## Threat scenario\n\nDefence-in-depth gap. Without a known container-runtime CVE in the chain, this finding is not directly exploitable. Recent runc CVEs (e.g. CVE-2024-21626) provided escape primitives that depended on host UID = container UID = 0 for full impact; with this fix, any future such escape primitive lands as a non-root user on the host.\n\n## Patch\n\n- Dockerfile adds `RUN groupadd -r ciguard && useradd -r -g ciguard -d /home/ciguard -m -s /usr/sbin/nologin ciguard && chown -R ciguard:ciguard /reports /policies-mount /app`.\n- Followed by `USER ciguard` before the `CMD` directive.\n- Trivy DS-0002 misconfig clears (`Tests: 20 SUCCESSES: 20 FAILURES: 0`).\n\n## Discovery\n\nFound by Trivy filesystem scan during ciguard's first self-conducted pentest cycle, 2026-04-26.\n\n## CVSS Scoring\n\n- CVSS v3.1: `CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N` — 2.0 (Low)\n- CVSS v4.0: `CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N` — 3.4 (Low) per Cycle 1 report; GitHub's calc 1.8 (Low). Both Low.\n\n## Verification\n\n```\n$ docker run --rm ghcr.io/jo-jo98/ciguard:v0.8.2 id\nuid=999(ciguard) gid=999(ciguard) groups=999(ciguard)\n```\n\n## References\n\n- Fix released in [v0.8.2](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2)\n- CI regression gate added in [v0.8.3](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3)\n- https://www.cve.org/CVERecord?id=CVE-2026-44218",
"summary": "ciguard: Container image runs as root (no USER directive)",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0.1.0"
},
{
"fixed": "0.8.2"
}
]
}
],
"package": {
"name": "ciguard",
"ecosystem": "PyPI"
},
"database_specific": {
"last_known_affected_version_range": "<= 0.8.1"
}
}
],
"modified": "2026-05-15T23:50:16Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
"published": "2026-05-05T22:18:15Z",
"references": [
{
"url": "https://github.com/Jo-Jo98/ciguard/security/advisories/GHSA-jrm4-4pcf-4763",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44218",
"type": "ADVISORY"
},
{
"url": "https://github.com/Jo-Jo98/ciguard",
"type": "PACKAGE"
},
{
"url": "https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2",
"type": "WEB"
},
{
"url": "https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-269"
],
"severity": "LOW",
"github_reviewed": true,
"nvd_published_at": "2026-05-12T20:16:42Z",
"github_reviewed_at": "2026-05-05T22:18:15Z"
}
}