CVE-2025-8194

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-07-28. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.

This vulnerability can be mitigated by including the following patch after importing the “tarfile” module:  https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
47%
KEV
Not listed

Published

July 28, 2025

Last Modified

July 31, 2026

Advisory Details (10)

Auto-updated Jul 30, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
github_commit

commit 73f03e480820 (python/cpython)

Fix landed in python/cpython commit 73f03e480820 — awaiting tagged release

https://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19
github_commit

commit 57f5981d6260 (python/cpython)

Fix landed in python/cpython commit 57f5981d6260 — awaiting tagged release

https://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2
github_commit

commit fbc2a0ca9ac8 (python/cpython)

Fix landed in python/cpython commit fbc2a0ca9ac8 — awaiting tagged release

https://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227
github_commit

commit c9d9f78feb14 (python/cpython)

Fix landed in python/cpython commit c9d9f78feb14 — awaiting tagged release

https://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f
generic

Mitigation for CVE-2025-8194 · GitHub

https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
github_commit

commit cdae923ffe18 (python/cpython)

Fix landed in python/cpython commit cdae923ffe18 — awaiting tagged release

https://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe
github_commit

commit 7040aa54f146 (python/cpython)

Fix landed in python/cpython commit 7040aa54f146 — awaiting tagged release

https://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38
generic

Mailman 3 [CVE-2025-8194] Tarfile infinite loop during parsing with negative member offset - Security-announce - python.org

https://mail.python.org/archives/list/[email protected]/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/
github_pr

gh-130577: tarfile now validates archives to ensure member offsets are non-negative

Fix merged in python/cpython PR #137027 on 2025-07-28 — awaiting tagged release

https://github.com/python/cpython/pull/137027
generic

`tarfile.StreamError: seeking backwards is not allowed` due to unskipped block with bad checksum · Issue #130577 · python/cpython · GitHub

https://github.com/python/cpython/issues/130577

Vendor Advisories for CVE-2025-8194(20)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhelai1/bootc-azure-amd-rhel9:1.5.4-17610737932025-11-03redhat
redhatrhelai1/bootc-gcp-nvidia-rhel9:1.5.4-17612360792025-11-03redhat
redhatrhelai1/instructlab-nvidia-rhel9:1.5.4-17612202542025-11-03redhat
redhatrhelai1/bootc-aws-nvidia-rhel9:1.5.4-17612361502025-11-03redhat
redhatrhelai1/instructlab-amd-rhel9:1.5.4-17610432272025-11-03redhat
redhatrhelai1/bootc-nvidia-rhel9:1.5.4-17612288382025-11-03redhat
redhatrhelai1/instructlab-intel-rhel9:1.5.4-17610504132025-11-03redhat
redhatrhelai1/bootc-azure-nvidia-rhel9:1.5.4-17612387362025-11-03redhat
redhatrhelai1/bootc-amd-rhel9:1.5.4-17610641792025-11-03redhat
redhatrhelai1/bootc-intel-rhel9:1.5.4-17610606892025-11-03redhat
redhatdiscovery/discovery-server-rhel9:2.2.1-17585559342025-09-23redhat
redhatpython3-0:3.6.8-24.el8_2.42025-09-22redhat
redhatpython3-0:3.6.8-39.el8_4.72025-09-18redhat
redhatpython3-0:3.6.8-51.el8_8.112025-09-18redhat
redhatpython3.9-0:3.9.16-1.el9_2.102025-09-18redhat
redhatpython39:3.9-8080020250908115040.93c2fc2f2025-09-17redhat
redhatpython39:3.9-8040020250909092632.63cd9eba2025-09-17redhat
redhatpython3-0:3.6.8-21.el7_9.22025-09-17redhat
redhatpython39:3.9-8060020250915132015.6a6313992025-09-17redhat
redhatpython3.11-0:3.11.2-2.el8_8.52025-09-17redhat
redhatpython3.11-0:3.11.7-1.el9_4.92025-09-16redhat
redhatpython3.11-0:3.11.2-2.el9_2.72025-09-16redhat
redhatpython3-0:3.6.8-47.el8_6.92025-09-16redhat
redhatpython3.9-0:3.9.10-4.el9_0.72025-09-15redhat
redhatpython3.9-0:3.9.18-3.el9_4.92025-09-15redhat
redhatpython3.12-0:3.12.1-4.el9_4.72025-09-04redhat
redhatpython3.11-0:3.11.11-2.el9_6.22025-09-02redhat
redhatpython3.12-0:3.12.9-2.el10_0.32025-09-02redhat
redhatpython3.9-0:3.9.21-2.el9_6.22025-09-02redhat
redhatpython3.12-0:3.12.9-1.el9_6.22025-09-02redhat

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

(9 across 4 ecosystems)
Debian:11(3)
PackageVulnerable rangeFixed inDependents
pypy37.3.10+dfsg-1 ... 7.3.9+dfsg-5 (53 versions)——
python2.72.7.18-10 ... 2.7.18-9 (10 versions)——
python3.93.9.2-1, 3.9.2-1+deb11u1, 3.9.2-1+deb11u2, 3.9.2-1+deb11u33.9.2-1+deb11u4—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
pypy37.3.11+dfsg-2 ... 7.3.23+dfsg-1 (29 versions)——
python3.113.11.2-6 ... 3.11.2-6+deb12u6 (7 versions)3.11.2-6+deb12u7—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
pypy37.3.19+dfsg-2 ... 7.3.23+dfsg-1 (11 versions)——
python3.133.13.5-23.13.5-2+deb13u1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
pypy37.3.19+dfsg-2, 7.3.20+dfsg-1, 7.3.20+dfsg-2, 7.3.20+dfsg-3, 7.3.20+dfsg-47.3.21+dfsg-1—
python3.133.13.5-23.13.6-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(15)

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 5× in last 7d / 28× 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 170 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 19:35 UTCOSV refresh
  4. 2026-09-01 13:53 UTCEPSS rescore
  5. 2026-08-30 01:21 UTCEPSS rescore
  6. 2026-08-28 21:40 UTCEPSS rescore
  7. 2026-08-27 14:24 UTCEPSS rescore
  8. 2026-08-26 14:45 UTCEPSS rescore
  9. 2026-08-25 13:48 UTCEPSS rescore
  10. 2026-08-24 14:16 UTCEPSS rescore
  11. 2026-08-23 00:18 UTCEPSS rescore
  12. 2026-08-21 23:48 UTCEPSS rescore
  13. 2026-08-20 22:55 UTCEPSS rescore
  14. 2026-08-19 17:03 UTCEPSS rescore
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-17 13:46 UTCEPSS rescore
  17. 2026-08-16 14:55 UTCEPSS rescore
  18. 2026-08-16 02:14 UTCEPSS rescore
  19. 2026-08-15 21:07 UTCOSV refresh
  20. 2026-08-15 01:30 UTCEPSS rescore
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-12 13:50 UTCEPSS rescore
  23. 2026-08-11 13:42 UTCEPSS rescore
  24. 2026-08-10 23:59 UTCEPSS rescore
  25. 2026-08-09 13:46 UTCEPSS rescore
Show 75 more
  1. 2026-08-08 16:36 UTCEPSS rescore
  2. 2026-08-07 16:27 UTCEPSS rescore
  3. 2026-08-06 13:46 UTCEPSS rescore
  4. 2026-08-05 19:17 UTCEPSS rescore
  5. 2026-08-04 10:37 UTCEPSS rescore
  6. 2026-08-03 10:35 UTCEPSS rescore
  7. 2026-08-02 02:26 UTCEPSS rescore
  8. 2026-08-01 04:15 UTCEPSS rescore
  9. 2026-07-31 14:25 UTCEG score recompute
  10. 2026-07-31 14:25 UTCVendor advisory
  11. 2026-07-31 14:25 UTCGHSA enrichment
  12. 2026-07-31 14:09 UTCEG score recompute
  13. 2026-07-31 14:09 UTCVendor advisory
  14. 2026-07-31 14:09 UTCGHSA enrichment
  15. 2026-07-30 23:20 UTCEG score recompute
  16. 2026-07-30 23:20 UTCVendor advisory
  17. 2026-07-30 23:20 UTCGHSA enrichment
  18. 2026-07-30 22:22 UTCEG score recompute
  19. 2026-07-30 22:21 UTCVendor advisory
  20. 2026-07-30 22:21 UTCGHSA enrichment
  21. 2026-07-30 16:27 UTCEPSS rescore
  22. 2026-07-30 01:30 UTCEPSS rescore
  23. 2026-07-27 15:57 UTCOSV refresh
  24. 2026-07-27 14:13 UTCEPSS rescore
  25. 2026-07-26 14:54 UTCEPSS rescore
  26. 2026-07-26 14:54 UTCEPSS rescore
  27. 2026-07-25 14:17 UTCEPSS rescore
  28. 2026-07-25 14:17 UTCEPSS rescore
  29. 2026-07-24 14:17 UTCEPSS rescore
  30. 2026-07-23 14:18 UTCEPSS rescore
  31. 2026-07-23 14:18 UTCEPSS rescore
  32. 2026-07-23 03:03 UTCEG score recompute
  33. 2026-07-22 14:08 UTCEPSS rescore
  34. 2026-07-21 15:24 UTCEPSS rescore
  35. 2026-07-20 17:08 UTCEPSS rescore
  36. 2026-07-19 14:30 UTCEPSS rescore
  37. 2026-07-19 14:30 UTCEPSS rescore
  38. 2026-07-19 02:28 UTCEPSS rescore
  39. 2026-07-19 02:28 UTCEPSS rescore
  40. 2026-07-18 10:04 UTCEPSS rescore
  41. 2026-07-18 10:04 UTCEPSS rescore
  42. 2026-07-16 17:02 UTCEPSS rescore
  43. 2026-07-16 17:02 UTCEPSS rescore
  44. 2026-07-15 16:57 UTCEPSS rescore
  45. 2026-07-15 16:57 UTCEPSS rescore
  46. 2026-07-15 02:00 UTCEPSS rescore
  47. 2026-07-15 01:59 UTCEPSS rescore
  48. 2026-07-13 06:12 UTCEPSS rescore
  49. 2026-07-12 05:46 UTCEPSS rescore
  50. 2026-07-12 05:46 UTCEPSS rescore
  51. 2026-07-11 08:27 UTCEPSS rescore
  52. 2026-07-11 08:27 UTCEPSS rescore
  53. 2026-07-10 08:52 UTCOSV refresh
  54. 2026-07-09 19:10 UTCEPSS rescore
  55. 2026-07-08 15:15 UTCEPSS rescore
  56. 2026-07-07 13:46 UTCEPSS rescore
  57. 2026-07-06 16:27 UTCEPSS rescore
  58. 2026-07-06 02:23 UTCEPSS rescore
  59. 2026-07-05 02:30 UTCEPSS rescore
  60. 2026-07-05 02:30 UTCEPSS rescore
  61. 2026-07-04 06:31 UTCEPSS rescore
  62. 2026-07-04 06:31 UTCEPSS rescore
  63. 2026-07-01 15:06 UTCEPSS rescore
  64. 2026-06-30 23:22 UTCEPSS rescore
  65. 2026-06-30 23:22 UTCEPSS rescore
  66. 2026-06-29 14:06 UTCEPSS rescore
  67. 2026-06-29 14:06 UTCEPSS rescore
  68. 2026-06-28 14:07 UTCEPSS rescore
  69. 2026-06-28 14:07 UTCEPSS rescore
  70. 2026-06-28 04:56 UTCEPSS rescore
  71. 2026-06-28 04:56 UTCEPSS rescore
  72. 2026-06-27 03:08 UTCEPSS rescore
  73. 2026-06-25 13:49 UTCEPSS rescore
  74. 2026-06-25 13:49 UTCEPSS rescore
  75. 2026-06-24 14:05 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-8194?
CVE-2025-8194 is a high vulnerability published on July 28, 2025. There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives.…
When was CVE-2025-8194 disclosed?
CVE-2025-8194 was first published in the National Vulnerability Database on July 28, 2025, with the most recent update on July 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-8194 actively exploited?
CVE-2025-8194 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 53.0% of all scored CVEs.
What is the CVSS score of CVE-2025-8194?
CVE-2025-8194 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2025-8194?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-8194, 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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