Vulnerability in drupal/composer (CVE-2026-11914)
Summary
Vulnerability in drupal/composer (CVE-2026-11914). Confidential information can be exposed externally.
Original description
The description as published by the source.
The security team is marking the Composer module for Drupal project unsupported. There is a known security issue with the project that has not been fixed by the maintainer. If you would like to maintain this project, please read: https://www.drupal.org/node/251466#s-becoming-owner-maintainer-or-co-mai...
Note: this is about a project for the Drupal system that makes use of composer. It is not a vulnerability in the composer software itself.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A weakness called CVE-2026-11914 was discovered in drupal/composer.
In plain terms, it is improper input validation.
Severity is Medium (CVSS 5.9/10). Exploitation requires specific conditions but can cause real harm if successful.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "drupal/composer CVE-2026-11914".
CVE-2026-11914 (drupal/composer). Severity: Medium / CVSSv3 5.9. Category: CWE-20.
Response plan:
- Check the vendor advisory for affected versions and the patched release.
- If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
- If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
- Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
A weakness (CVE-2026-11914) in drupal/composer. In plain words, it is improper input validation.
Target versions of drupal/composer (see vendor advisory). If running in production, identify exposure immediately.
Severity: Medium (CVSS 5.9/10). Exploitation requires specific conditions but can cause real harm if successful.
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-20)
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'drupal/composer' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
drupal/composerを grep し、稼働しているサービス・バージョンを把握する。 -
7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
References
- web drupal.org
- web nvd.nist.gov
- web github.com