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PYSEC-2026-2409

LowCVSS 3 / 10
Published Jul 13, 2026·Last modified Jul 13, 2026
Affected Components(0)

No affected components available

Description

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
Risk Scores
Base Score
3.0

The vulnerability requires local access to the device to be exploited. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.

Threat Intelligence
2.8

Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.

EPSS
0.12%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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