CVE-2026-11972

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% 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
Trending — Patch released this week
8.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.2Exploit: NoneExposed: 0

A fix is available — apply it.

When using the "tarfile" module with a file opened in "streaming mode" (mode="r|") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.

CVSS v3
8.2
EG Score
8.2(medium)
EPSS
34.8%
KEV
Not listed

Published

June 23, 2026

Last Modified

June 30, 2026

Advisory Details (3)

Auto-updated Jun 24, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic

Mailman 3 [CVE-2026-11972] tarfile opened in streaming mode mishandles EOF - Security-announce - python.org

https://mail.python.org/archives/list/[email protected]/thread/AXPSKKTSRKXTTJULW3XSIC74WZNAAPPB/
github_pr

gh-151981: Make tarfile._Stream.seek break at EOF

Fix merged in python/cpython PR #151982 on 2026-06-23 — awaiting tagged release

https://github.com/python/cpython/pull/151982
generic

tarfile._Stream.seek ignores EOF · Issue #151981 · python/cpython · GitHub

https://github.com/python/cpython/issues/151981

Vendor Advisories for CVE-2026-11972(6)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpython3-12-main-3.12.13-3.3.hum12026-07-05redhat
redhatpython3-14-main-3.14.6-1.2.hum12026-07-05redhat
redhatpython3-11-main-3.11.15-4.4.hum12026-07-05redhat
redhatpython3-13-main-3.13.14-1.2.hum12026-07-05redhat

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.

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 38× in last 7d / 70× 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. 2026-07-07 01:25 UTCEG score recompute
  2. 2026-07-07 01:25 UTCVendor advisory
  3. 2026-07-07 01:25 UTCGHSA enrichment
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 13:24 UTCEG score recompute
  6. 2026-07-06 13:24 UTCVendor advisory
  7. 2026-07-06 13:23 UTCGHSA enrichment
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-06 01:06 UTCEG score recompute
  10. 2026-07-06 01:06 UTCGHSA enrichment
  11. 2026-07-05 12:56 UTCEG score recompute
  12. 2026-07-05 12:56 UTCGHSA enrichment
  13. 2026-07-05 02:30 UTCEPSS rescore
  14. 2026-07-05 02:30 UTCEPSS rescore
  15. 2026-07-05 00:55 UTCEG score recompute
  16. 2026-07-05 00:55 UTCGHSA enrichment
  17. 2026-07-04 12:54 UTCEG score recompute
  18. 2026-07-04 12:54 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 00:53 UTCEG score recompute
  21. 2026-07-04 00:53 UTCGHSA enrichment
  22. 2026-07-03 12:53 UTCEG score recompute
  23. 2026-07-03 12:52 UTCGHSA enrichment
  24. 2026-07-02 23:58 UTCEG score recompute
  25. 2026-07-02 23:58 UTCGHSA enrichment
Show 45 more
  1. 2026-07-02 11:58 UTCEG score recompute
  2. 2026-07-02 11:58 UTCGHSA enrichment
  3. 2026-07-01 23:57 UTCEG score recompute
  4. 2026-07-01 23:57 UTCGHSA enrichment
  5. 2026-07-01 15:06 UTCEPSS rescore
  6. 2026-07-01 15:06 UTCEPSS rescore
  7. 2026-07-01 11:56 UTCEG score recompute
  8. 2026-07-01 11:56 UTCGHSA enrichment
  9. 2026-06-30 23:55 UTCEG score recompute
  10. 2026-06-30 23:55 UTCGHSA enrichment
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 11:54 UTCEG score recompute
  13. 2026-06-30 11:54 UTCGHSA enrichment
  14. 2026-06-29 23:49 UTCEG score recompute
  15. 2026-06-29 23:48 UTCGHSA enrichment
  16. 2026-06-29 11:45 UTCEG score recompute
  17. 2026-06-29 11:45 UTCGHSA enrichment
  18. 2026-06-28 23:44 UTCEG score recompute
  19. 2026-06-28 23:44 UTCGHSA enrichment
  20. 2026-06-28 14:07 UTCEPSS rescore
  21. 2026-06-28 11:42 UTCEG score recompute
  22. 2026-06-28 11:42 UTCGHSA enrichment
  23. 2026-06-28 04:56 UTCEPSS rescore
  24. 2026-06-28 04:56 UTCEPSS rescore
  25. 2026-06-27 23:41 UTCEG score recompute
  26. 2026-06-27 23:41 UTCGHSA enrichment
  27. 2026-06-27 11:40 UTCEG score recompute
  28. 2026-06-27 11:40 UTCGHSA enrichment
  29. 2026-06-27 03:08 UTCEPSS rescore
  30. 2026-06-26 23:39 UTCEG score recompute
  31. 2026-06-26 23:38 UTCGHSA enrichment
  32. 2026-06-26 11:37 UTCEG score recompute
  33. 2026-06-26 11:37 UTCGHSA enrichment
  34. 2026-06-25 23:36 UTCEG score recompute
  35. 2026-06-25 23:36 UTCGHSA enrichment
  36. 2026-06-25 13:49 UTCEPSS rescore
  37. 2026-06-25 11:35 UTCEG score recompute
  38. 2026-06-25 11:35 UTCGHSA enrichment
  39. 2026-06-24 23:34 UTCEG score recompute
  40. 2026-06-24 23:34 UTCGHSA enrichment
  41. 2026-06-24 14:05 UTCEPSS rescore
  42. 2026-06-24 11:33 UTCEG score recompute
  43. 2026-06-24 11:33 UTCGHSA enrichment
  44. 2026-06-23 23:30 UTCEG score recompute
  45. 2026-06-23 23:29 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-11972?
CVE-2026-11972 is a high vulnerability published on June 23, 2026. When using the "tarfile" module with a file opened in "streaming mode" (mode="r|") the tarfile module did not properly handle EOF, making archive parsing take exponentially longer.
When was CVE-2026-11972 disclosed?
CVE-2026-11972 was first published in the National Vulnerability Database on June 23, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11972 actively exploited?
CVE-2026-11972 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11972?
CVE-2026-11972 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-11972?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11972, 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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