CVE-2026-44218: ciguard Container Image Runs As Root Vulnerability

LOW
Advisory Identifier: GHSA-jrm4-4pcf-4763
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CVSS 3.0
CWE-269
Published
Advisory Summary

CVE-2026-44218 is a LOW (CVSS 3.0) container image runs as root vulnerability (CWE-269: Improper Privilege Management) affecting ciguard libraries in the PyPI ecosystem. The issue involves container image runs as root (no user directive). Remediation is available by upgrading affected packages to version 0.8.2.

CVE-2026-44218 at a Glance

CVE Identifier CVE-2026-44218
GHSA Identifier GHSA-jrm4-4pcf-4763
Severity LOW
CVSS v3.1 Base Score 3.0
CWE Classification CWE-269: Improper Privilege Management
Affected Product ciguard
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 3.0

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Local (AV:L)
Attack Complexity High (AC:H)
Privileges Required High (PR:H)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-44218

To remediate this vulnerability, upgrade all affected ciguard dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ciguard fixed: 0.8.2 
pip install ciguard>=0.8.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show ciguard

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-44218, inspect your installed packages using pip:

pip show ciguard

Analyze the terminal output to locate any version of ciguard in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.8.2), your application is affected.

Note: The pip show ciguard command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-269: Improper Privilege Management, where the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. In ciguard, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2) - CI regression gate added in [v0.8.3](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3) - https://www.cve.org/CVERecord?id=CVE-2026-44218

CVE-2026-44218 Affected ciguard Versions

1 component(s)
Fixed Versions:
0.8.2
Product / Package Ecosystem Affected Versions Fixed Version
ciguard
pypi/ciguard
PyPI
≥ 0.1.0
< 0.8.2
0.8.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/Jo-Jo98/ciguard/security/advisories/GHSA-jrm4-4pcf-4763
NVD — CVE-2026-44218 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44218
ciguard Source Repository REPOSITORY
https://github.com/Jo-Jo98/ciguard
ciguard Release RELEASE
https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2
ciguard Release RELEASE
https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3

Frequently Asked Questions

What is CVE-2026-44218?
CVE-2026-44218 is a security vulnerability in ciguard involving Container image runs as root (no USER directive) under CWE-269: Improper Privilege Management.
Which ciguard versions are affected?
Affected versions include releases prior to 0.8.2 across affected packages: ciguard.
What version fixes CVE-2026-44218?
Upgrading to 0.8.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ciguard affected?
Yes, ciguard is affected in releases prior to 0.8.2. Upgrade your dependency to 0.8.2 or later.
What is the CVSS score of CVE-2026-44218?
CVE-2026-44218 has a CVSS v3.1 base score of 3.0 (LOW) with vector string CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2026-44218?
CVE-2026-44218 is classified under CWE-269: Improper Privilege Management (The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.).
How can I check PyPI dependencies for CVE-2026-44218?
Run the dependency tree command: 'pip show ciguard'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jrm4-4pcf-4763",
  "modified" : "2026-05-15T23:50:16Z",
  "published" : "2026-05-05T22:18:15Z",
  "aliases" : [ "CVE-2026-44218" ],
  "summary" : "ciguard: Container image runs as root (no USER directive)",
  "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",
  "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ciguard"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.1.0"
      }, {
        "fixed" : "0.8.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.8.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Jo-Jo98/ciguard/security/advisories/GHSA-jrm4-4pcf-4763"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-44218"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Jo-Jo98/ciguard"
  }, {
    "type" : "WEB",
    "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"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-269" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-05T22:18:15Z",
    "nvd_published_at" : "2026-05-12T20:16:42Z"
  }
}