CVE-2026-31253

HIGHNVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-05-11. NVD baseline CVSS 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.3Exploit: NoneExposed: 0

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

The flash-attention training framework thru commit e724e2588cbe754beb97cf7c011b5e7e34119e62 (2025-13-04) contains an insecure deserialization vulnerability (CWE-502) in its checkpoint loading mechanism. The load_checkpoint() function in checkpoint.py and the checkpoint loading code in eval.py use torch.load() without enabling the security-restrictive weights_only=True parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing a maliciously crafted checkpoint file. When a victim loads this checkpoint during model warmstarting or evaluation, arbitrary code is executed on the victim's system.

CVSS v3
7.3
EG Score
7.3(medium)
EPSS
12.2%
KEV
Not listed

Published

May 11, 2026

Last Modified

May 12, 2026

Advisory Details (2)

Auto-updated Jun 11, 2026
No patch confirmed yet.
generic

Notion

https://www.notion.so/CVE-2026-31253-35d1e1393188813f9e77e2038104bc49
generic

GitHub - Dao-AILab/flash-attention: Fast and memory-efficient exact attention · GitHub

https://github.com/Dao-AILab/flash-attention

Vendor Advisories for CVE-2026-31253(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
pipflash_attn—ghsa

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

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
flash-attn0.2.0 ... 2.8.3 (75 versions)——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 55× 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 163 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-31253?
CVE-2026-31253 is a high vulnerability published on May 11, 2026. The flash-attention training framework thru commit e724e2588cbe754beb97cf7c011b5e7e34119e62 (2025-13-04) contains an insecure deserialization vulnerability (CWE-502) in its checkpoint loading mechanism. The loadcheckpoint() function in checkpoint.py and the checkpoint loading code in eval.py use…
When was CVE-2026-31253 disclosed?
CVE-2026-31253 was first published in the National Vulnerability Database on May 11, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31253 actively exploited?
CVE-2026-31253 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31253?
CVE-2026-31253 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-31253?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31253, 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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