Path Traversal in pdm (CVE-2026-47764)
Summary
Path traversal in pdm (CVE-2026-47764). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 2.27.0 or later.
Original description
The description as published by the source.
InstallDestination.write_to_fs() in src/pdm/installers/installers.py overrides the base class to add symlink/hardlink support but replaces the safe _path_with_destdir() (which validates via Path.resolve() + is_relative_to()) with a bare os.path.join() that performs no path validation. A malicious wheel with traversal entries can write arbitrary files. Same class as Poetry CVE-2026-34591. Fix ready at: https://github.com/pdm-project/pdm/pull/3787.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
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 CVE-2026-47764 has been found in pdm.
Risk of unauthorized operations or information disclosure.
What to do: upgrade pdm to 2.27.0 or later.
If unsure, ask your IT team or search "pdm CVE-2026-47764" on the vendor's site.
CVE-2026-47764 (pdm) — CWE-22
Patched: 2.27.0 — apply immediately
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.
Path traversal (CWE-22) exists in pdm.
Check the vendor advisory for the affected versions of pdm.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 2.27.0.
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 'pdm' . 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
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1Identify exposure identify
grep -r 'pdm' . | 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
pdmを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade pdm to 2.27.0ステージング環境で 2.27.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-47764 pdm
- Ubuntu UBUNTU-CVE-2026-47764 pdm
References
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com