Vulnerability in pygments
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 vulnerability tracked as UBUNTU-CVE-2026-4539 has been found in pygments.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "pygments UBUNTU-CVE-2026-4539" on the vendor's site.
UBUNTU-CVE-2026-4539 (pygments)
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in pygments.
Check the vendor advisory for the affected versions of pygments.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'pygments' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1
Identify exposureidentify
grep -r 'pygments' . | 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
pygmentsを grep し、稼働しているサービス・バージョンを把握する。 -
2
Post-deployment verificationverify
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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
| Ecosystem | Package | Affected | Fixed |
|---|---|---|---|
| Ubuntu:Pro:14.04:LTS | pygments |
All versions |
— |
| Ubuntu:16.04:LTS | pygments |
All versions |
— |
| Ubuntu:18.04:LTS | pygments |
All versions |
— |
| Ubuntu:20.04:LTS | pygments |
All versions |
— |
| Ubuntu:22.04:LTS | pygments |
All versions |
— |
| Ubuntu:24.04:LTS | pygments |
All versions |
— |
| Ubuntu:25.10 | pygments |
All versions |
— |
| Ubuntu:26.04:LTS | pygments |
All versions |
— |
| Ubuntu:26.10 | pygments |
All versions |
— |
Original description The description as published by the source.
A security flaw has been discovered in pygments up to 2.19.2. The impacted element is the function AdlLexer of the file pygments/lexers/archetype.py. The manipulation results in inefficient regular expression complexity. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Source: OSV.dev (Open Source Vulnerabilities) OSV
References
- report ubuntu.com
- report cve.org
- report github.com
- report github.com
- report vuldb.com
- report vuldb.com
- report vuldb.com