CVE-2025-4517

CRITICALNVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

Score 9.4 from GitHub Security Advisory (severity: CRITICAL) published 2025-06-03. NVD baseline CVSS 9.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.4Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Allows arbitrary filesystem writes outside the extraction directory during extraction with filter="data".

You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information.

Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected.

Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

CVSS v3
9.4
EG Score
9.4(medium)
EG Risk
73(Track)
EG Risk 73/100SSVC: 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
Severity94% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
71%
KEV
Not listed

Published

June 3, 2025

Last Modified

August 4, 2026

Advisory Details (12)

Auto-updated Aug 29, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
github_commit

commit 4633f3f497b1 (python/cpython)

Fix landed in python/cpython commit 4633f3f497b1 — awaiting tagged release

https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e
github_commit

commit 28463dba112a (python/cpython)

Fix landed in python/cpython commit 28463dba112a — awaiting tagged release

https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9
github_commit

commit aa9eb5f757ce (python/cpython)

Fix landed in python/cpython commit aa9eb5f757ce — awaiting tagged release

https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01
github_commit

commit 19de092debb3 (python/cpython)

Fix landed in python/cpython commit 19de092debb3 — awaiting tagged release

https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da
generic

Mitigation for CVE-2025-4517, CVE-2025-4330, CVE-2025-4138, and CVE-2024-12718 · GitHub

https://gist.github.com/sethmlarson/52398e33eff261329a0180ac1d54f42f
github_commit

commit 9e0ac76d96cf (python/cpython)

Fix landed in python/cpython commit 9e0ac76d96cf — awaiting tagged release

https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a
github_commit

commit 3612d8f51741 (python/cpython)

Fix landed in python/cpython commit 3612d8f51741 — awaiting tagged release

https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a
generic

Mailman 3 Multiple CVEs (1 CRITICAL, 3 HIGH, 1 MODERATE) affecting the tarfile module - Security-announce - python.org

https://mail.python.org/archives/list/[email protected]/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/
github_pr

gh-135034: Normalize link targets in tarfile, add `os.path.realpath(strict='allow_missing')`

Fix merged in python/cpython PR #135037 on 2025-06-03 — awaiting tagged release

https://github.com/python/cpython/pull/135037
generic

Multiple tarfile extraction filter bypasses (`filter="tar"`/`filter="data"`) · Issue #135034 · python/cpython · GitHub

https://github.com/python/cpython/issues/135034
github_commit

commit dd8f187d0746 (python/cpython)

Fix landed in python/cpython commit dd8f187d0746 — awaiting tagged release

https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1
github_commit

commit 9c1110ef6652 (python/cpython)

Fix landed in python/cpython commit 9c1110ef6652 — awaiting tagged release

https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a

Vendor Advisories for CVE-2025-4517(17)

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

Patch Availability(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3.13-venv (3.13.3-1ubuntu0.2) @ plucky2026-05-21ubuntu
redhatopenshift-serverless-1/logic-swf-devmode-rhel8:1.36.0-72026-01-22redhat
redhatpython39-devel:3.9-8100020251126112422.d47b87a42025-12-18redhat
redhatcert-manager/jetstack-cert-manager-rhel9:v1.16.5-17605157572025-10-16redhat
redhatdiscovery/discovery-server-rhel9:2.0.1-17544787272025-08-06redhat
redhatrhpam-7/rhpam-smartrouter-rhel8:7.13.5-4.17520657552025-07-17redhat
redhatpython3-0:3.6.8-51.el8_8.102025-07-08redhat
redhatpython3-0:3.6.8-47.el8_6.82025-07-07redhat
redhatpython3.9-0:3.9.18-3.el9_4.82025-07-07redhat
redhatpython3.12-0:3.12.9-1.el9_6.12025-07-02redhat
redhatpython3.12-0:3.12.9-2.el10_0.22025-07-01redhat
redhatpython3.9-0:3.9.21-2.el9_6.12025-07-01redhat
redhatpython3.12-0:3.12.11-1.el8_102025-07-01redhat
redhatpython3.12-0:3.12.1-4.el9_4.62025-07-01redhat
redhatpython3.11-0:3.11.11-2.el9_6.12025-07-01redhat
redhatpython3.11-0:3.11.13-1.el8_102025-07-01redhat
redhatpython3-0:3.6.8-70.el8_102025-07-01redhat
redhatpython3.11-0:3.11.7-1.el9_4.82025-06-30redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(13 across 9 ecosystems)
Alpine:v3.23(2)
PackageVulnerable rangeFixed inDependents
python3—3.12.11-r0—
python3-tkinter—3.12.11-r0—
Alpine:v3.24(2)
PackageVulnerable rangeFixed inDependents
python3—3.12.11-r0—
python3-tkinter—3.12.11-r0—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
pypy37.3.19+dfsg-2 ... 7.3.23+dfsg-1 (11 versions)——
python3.13—3.13.4-1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
pypy37.3.19+dfsg-2, 7.3.20+dfsg-17.3.20+dfsg-2—
python3.13—3.13.4-1—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
python3—3.11.13-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
python3—3.12.11-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
python3—3.12.11-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
python3—3.12.11-r0—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
pypy37.3.11+dfsg-2 ... 7.3.23+dfsg-1 (29 versions)——

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 29× 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.

Showing the most recent 100 of 190 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:11 UTCEPSS rescore
  3. 2026-09-01 13:53 UTCEPSS rescore
  4. 2026-09-01 04:38 UTCEPSS rescore
  5. 2026-08-30 19:16 UTCEPSS rescore
  6. 2026-08-30 01:21 UTCEPSS rescore
  7. 2026-08-28 21:40 UTCEPSS rescore
  8. 2026-08-27 14:24 UTCEPSS rescore
  9. 2026-08-26 14:45 UTCEPSS rescore
  10. 2026-08-25 13:48 UTCEPSS rescore
  11. 2026-08-24 14:16 UTCEPSS rescore
  12. 2026-08-24 09:22 UTCEPSS rescore
  13. 2026-08-23 00:18 UTCEPSS rescore
  14. 2026-08-21 23:48 UTCEPSS rescore
  15. 2026-08-20 22:54 UTCEPSS rescore
  16. 2026-08-19 19:04 UTCOSV refresh
  17. 2026-08-19 17:03 UTCEPSS rescore
  18. 2026-08-18 13:47 UTCEPSS rescore
  19. 2026-08-17 13:46 UTCEPSS rescore
  20. 2026-08-16 14:55 UTCEPSS rescore
  21. 2026-08-16 02:13 UTCEPSS rescore
  22. 2026-08-15 01:29 UTCEPSS rescore
  23. 2026-08-13 21:59 UTCEPSS rescore
  24. 2026-08-12 13:50 UTCEPSS rescore
  25. 2026-08-11 13:41 UTCEPSS rescore
Show 75 more
  1. 2026-08-10 23:59 UTCEPSS rescore
  2. 2026-08-09 13:46 UTCEPSS rescore
  3. 2026-08-08 16:36 UTCEPSS rescore
  4. 2026-08-06 13:46 UTCEPSS rescore
  5. 2026-08-05 19:16 UTCEPSS rescore
  6. 2026-08-04 15:09 UTCEPSS rescore
  7. 2026-08-04 14:50 UTCEG score recompute
  8. 2026-08-04 14:50 UTCVendor advisory
  9. 2026-08-04 14:50 UTCGHSA enrichment
  10. 2026-08-04 10:37 UTCEPSS rescore
  11. 2026-08-03 10:35 UTCEPSS rescore
  12. 2026-08-02 02:26 UTCEPSS rescore
  13. 2026-08-01 04:15 UTCEPSS rescore
  14. 2026-07-31 14:25 UTCVendor advisory
  15. 2026-07-31 14:25 UTCGHSA enrichment
  16. 2026-07-31 14:09 UTCVendor advisory
  17. 2026-07-31 14:09 UTCGHSA enrichment
  18. 2026-07-30 23:20 UTCVendor advisory
  19. 2026-07-30 23:20 UTCGHSA enrichment
  20. 2026-07-30 22:22 UTCEG score recompute
  21. 2026-07-30 22:22 UTCVendor advisory
  22. 2026-07-30 22:21 UTCGHSA enrichment
  23. 2026-07-30 16:27 UTCEPSS rescore
  24. 2026-07-30 01:30 UTCEPSS rescore
  25. 2026-07-30 01:30 UTCEPSS rescore
  26. 2026-07-28 15:35 UTCEPSS rescore
  27. 2026-07-27 19:22 UTCEG score recompute
  28. 2026-07-27 19:22 UTCVendor advisory
  29. 2026-07-27 19:21 UTCGHSA enrichment
  30. 2026-07-26 14:54 UTCEPSS rescore
  31. 2026-07-25 14:17 UTCEPSS rescore
  32. 2026-07-25 14:17 UTCEPSS rescore
  33. 2026-07-24 14:17 UTCEPSS rescore
  34. 2026-07-23 14:18 UTCEPSS rescore
  35. 2026-07-23 02:56 UTCEG score recompute
  36. 2026-07-22 14:07 UTCEPSS rescore
  37. 2026-07-22 14:07 UTCEPSS rescore
  38. 2026-07-21 15:24 UTCEPSS rescore
  39. 2026-07-20 17:07 UTCEPSS rescore
  40. 2026-07-19 14:30 UTCEPSS rescore
  41. 2026-07-19 14:30 UTCEPSS rescore
  42. 2026-07-19 02:28 UTCEPSS rescore
  43. 2026-07-19 02:28 UTCEPSS rescore
  44. 2026-07-18 10:04 UTCEPSS rescore
  45. 2026-07-16 17:02 UTCEPSS rescore
  46. 2026-07-16 17:02 UTCEPSS rescore
  47. 2026-07-15 16:57 UTCEPSS rescore
  48. 2026-07-15 16:57 UTCEPSS rescore
  49. 2026-07-15 01:59 UTCEPSS rescore
  50. 2026-07-15 01:59 UTCEPSS rescore
  51. 2026-07-13 22:29 UTCEPSS rescore
  52. 2026-07-13 22:29 UTCEPSS rescore
  53. 2026-07-13 06:12 UTCEPSS rescore
  54. 2026-07-12 05:46 UTCEPSS rescore
  55. 2026-07-11 08:27 UTCEPSS rescore
  56. 2026-07-11 08:27 UTCEPSS rescore
  57. 2026-07-10 12:11 UTCOSV refresh
  58. 2026-07-09 19:09 UTCEPSS rescore
  59. 2026-07-09 19:09 UTCEPSS rescore
  60. 2026-07-08 15:15 UTCEPSS rescore
  61. 2026-07-07 13:45 UTCEPSS rescore
  62. 2026-07-06 16:27 UTCEPSS rescore
  63. 2026-07-06 16:27 UTCEPSS rescore
  64. 2026-07-06 02:23 UTCEPSS rescore
  65. 2026-07-06 02:23 UTCEPSS rescore
  66. 2026-07-05 02:30 UTCEPSS rescore
  67. 2026-07-04 06:30 UTCEPSS rescore
  68. 2026-07-02 17:01 UTCEPSS rescore
  69. 2026-07-01 15:06 UTCEPSS rescore
  70. 2026-06-30 23:22 UTCEPSS rescore
  71. 2026-06-30 23:22 UTCEPSS rescore
  72. 2026-06-29 14:06 UTCEPSS rescore
  73. 2026-06-29 14:06 UTCEPSS rescore
  74. 2026-06-28 14:07 UTCEPSS rescore
  75. 2026-06-28 14:07 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (4 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCAzureADTrent/CVE-2025-4517-POC
    First seen Feb 15, 2026

    Privilege Escalation script for CVE-2025-4517

    Open source ↗
  • GitHub PoC0xDTC/CVE-2025-4517-tarfile-PATH_MAX-bypass
    First seen Feb 15, 2026

    Python tarfile data filter bypass via PATH_MAX overflow in os.path.realpath() - CVE-2025-4517 / CVE-2025-4330

    Open source ↗
  • GitHub PoCAnimePrincess420/CVE-2025-4517-PoC
    First seen Feb 15, 2026

    CVE‑2025‑4517 Proof‑of‑Concept Script

    Open source ↗
  • GitHub PoCStealthByte0/CVE-2025-4517-poc
    First seen Feb 15, 2026

    CVE-2025-4517 (CVSS 9.4 – Critical) A vulnerability in Python's `tarfile`

    Open source ↗

Frequently asked(5)

What is CVE-2025-4517?
CVE-2025-4517 is a critical vulnerability published on June 3, 2025. Allows arbitrary filesystem writes outside the extraction directory during extraction with filter="data". You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of…
When was CVE-2025-4517 disclosed?
CVE-2025-4517 was first published in the National Vulnerability Database on June 3, 2025, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-4517 actively exploited?
CVE-2025-4517 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 28.8% of all scored CVEs.
What is the CVSS score of CVE-2025-4517?
CVE-2025-4517 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2025-4517?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-4517, 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

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