CVE-2026-47764

HIGHPre-NVD 8.48.4—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 96% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
8.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.4Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

pdm is a Python package and dependency manager supporting the latest PEP standards. Versions prior to 2.27.0 are vulnerable to path traversal through write_to_fs. 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. This issue has been fixed in version 2.27.0.

CVSS v3
8.4
EG Score
8.4(medium)
EG Risk
53(Track)
EG Risk 53/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity84% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

June 10, 2026

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Aug 4, 2026
Patch available. Sources: github_release, github.
github_release Patch Available

v2.27.0

Patch available: pdm-project/pdm 2.27.0

https://github.com/pdm-project/pdm/releases/tag/2.27.0
github Patch Available

Path traversal in wheel installation via overridden write_to_fs (CWE-22) · Advisory · pdm-project/pdm · GitHub

https://github.com/pdm-project/pdm/security/advisories/GHSA-78v8-vpjp-cjqh

Vendor Advisories for CVE-2026-47764(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pdm2.2.1+ds1-1 ... 2.28.0-1 (14 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
pdm2.20.1+ds1-2 ... 2.28.0-1 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
pdm2.20.1+ds1-2 ... 2.26.6-1 (7 versions)2.27.0-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
pdm0.0.0 ... 2.9.3 (247 versions)2.27.0—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 41× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-25 00:19 UTCEG score recompute
  4. 2026-08-23 10:46 UTCEG score recompute
  5. 2026-08-23 00:19 UTCEPSS rescore
  6. 2026-08-21 23:49 UTCEPSS rescore
  7. 2026-08-21 08:00 UTCEG score recompute
  8. 2026-08-20 22:55 UTCEPSS rescore
  9. 2026-08-20 08:52 UTCEG score recompute
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 14:56 UTCEG score recompute
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-16 23:32 UTCEG score recompute
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 11:23 UTCEG score recompute
  17. 2026-08-16 02:14 UTCEPSS rescore
  18. 2026-08-15 10:50 UTCEG score recompute
  19. 2026-08-15 01:30 UTCEPSS rescore
  20. 2026-08-13 22:16 UTCEG score recompute
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-12 20:05 UTCEG score recompute
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-11 21:07 UTCEG score recompute
  25. 2026-08-11 09:39 UTCEG score recompute
Show 22 more
  1. 2026-08-11 00:00 UTCEPSS rescore
  2. 2026-08-09 23:08 UTCEG score recompute
  3. 2026-08-09 13:46 UTCEPSS rescore
  4. 2026-08-09 00:03 UTCEG score recompute
  5. 2026-08-08 16:37 UTCEPSS rescore
  6. 2026-08-08 01:05 UTCEG score recompute
  7. 2026-08-06 14:38 UTCEG score recompute
  8. 2026-08-06 13:47 UTCEPSS rescore
  9. 2026-08-06 03:00 UTCEG score recompute
  10. 2026-08-05 19:17 UTCEPSS rescore
  11. 2026-08-05 15:31 UTCEG score recompute
  12. 2026-08-05 14:38 UTCEG score recompute
  13. 2026-08-04 19:26 UTCEG score recompute
  14. 2026-08-04 18:21 UTCEG score recompute▲ 8.40
  15. 2026-08-04 18:20 UTCMITRE cvelistV5CVSS v3 → 8.4 · CVSS v4 → 8.4
  16. 2026-07-30 09:45 UTCEG score recompute
  17. 2026-07-26 20:56 UTCEG score recompute
  18. 2026-07-23 03:17 UTCEG score recompute
  19. 2026-06-14 23:18 UTCEPSS rescore
  20. 2026-06-13 23:00 UTCEPSS rescore
  21. 2026-06-12 23:12 UTCEPSS rescore
  22. 2026-06-10 21:17 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-47764?
CVE-2026-47764 is a high vulnerability published on June 10, 2026. pdm is a Python package and dependency manager supporting the latest PEP standards. Versions prior to 2.27.0 are vulnerable to path traversal through writetofs. InstallDestination.writetofs() in src/pdm/installers/installers.py overrides the base class to add symlink/hardlink support but replaces…
When was CVE-2026-47764 disclosed?
CVE-2026-47764 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47764 actively exploited?
CVE-2026-47764 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 95.7% of all scored CVEs.
What is the CVSS score of CVE-2026-47764?
CVE-2026-47764 has a CVSS v3 base score of 8.4 (NVD).
How do I remediate CVE-2026-47764?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47764, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-47764

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