GHSA-jrm4-4pcf-4763

Suggest an improvement
Source
https://github.com/advisories/GHSA-jrm4-4pcf-4763
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-jrm4-4pcf-4763/GHSA-jrm4-4pcf-4763.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-jrm4-4pcf-4763
Aliases
  • CVE-2026-44218
Published
2026-05-05T22:18:15Z
Modified
2026-05-16T00:08:49.968758Z
Severity
  • 3.0 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
  • 1.8 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
ciguard: Container image runs as root (no USER directive)
Details

Summary

The 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.

Threat scenario

Defence-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.

Patch

  • 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.
  • Followed by USER ciguard before the CMD directive.
  • Trivy DS-0002 misconfig clears (Tests: 20 SUCCESSES: 20 FAILURES: 0).

Discovery

Found by Trivy filesystem scan during ciguard's first self-conducted pentest cycle, 2026-04-26.

CVSS Scoring

  • 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)
  • 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.

Verification

$ docker run --rm ghcr.io/jo-jo98/ciguard:v0.8.2 id
uid=999(ciguard) gid=999(ciguard) groups=999(ciguard)

References

  • Fix released in v0.8.2
  • CI regression gate added in v0.8.3
  • https://www.cve.org/CVERecord?id=CVE-2026-44218
Database specific 
{
    "github_reviewed_at": "2026-05-05T22:18:15Z",
    "nvd_published_at": "2026-05-12T20:16:42Z",
    "cwe_ids": [
        "CWE-269"
    ],
    "severity": "LOW",
    "github_reviewed": true
}
References

Affected packages

PyPI / ciguard

Package

Name
ciguard
View open source insights on deps.dev
Purl
pkg:pypi/ciguard

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0.1.0
Fixed
0.8.2

Affected versions

0.*
0.1.0
0.1.1
0.1.2
0.1.3
0.1.4
0.2.0
0.2.1
0.3.0
0.4.0
0.4.1
0.5.0
0.6.0
0.6.1
0.7.0
0.8.1

Database specific

last_known_affected_version_range 
"<= 0.8.1"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-jrm4-4pcf-4763/GHSA-jrm4-4pcf-4763.json"