CVE-2026-39892

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 93% 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, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in 46.0.7.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
47.4%
KEV
Not listed

Published

April 8, 2026

Last Modified

July 21, 2026

Advisory Details (10)

Auto-updated Jul 20, 2026
Patch available. Sources: github, redhat.
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:24483
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:23361
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:22840
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:22629
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:22465
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:21017
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:20338
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:19375
generic

oss-security - PyCA cryptography 46.0.7 released, fixes CVE-2026-39892

http://www.openwall.com/lists/oss-security/2026/04/08/12
github Patch Available

Buffer overflow if non-contiguous buffers were passed to APIs · Advisory · pyca/cryptography · GitHub

https://github.com/pyca/cryptography/security/advisories/GHSA-p423-j2cm-9vmq

Vendor Advisories for CVE-2026-39892(20)

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

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhoai/odh-vllm-gaudi-rhel9:17800690692026-06-10redhat
redhatquay/quay-rhel8:17808913952026-06-09redhat
redhatpython3.12-cryptography-0:46.0.7-1.el9ap2026-06-09redhat
redhatansible-automation-platform-tech-preview/metrics-service-rhel9:17797608442026-06-09redhat
redhatrhtas/model-transparency-rhel9:17809148862026-06-08redhat
redhatquay/quay-rhel8:17798114732026-06-04redhat
redhatquay/quay-rhel8:17798222612026-06-03redhat
redhatquay/quay-rhel9:17799222052026-06-02redhat
redhatquay/quay-rhel8:17798114122026-06-02redhat
redhatquay/quay-rhel8:17796893922026-05-26redhat
redhatdiscovery/discovery-server-rhel9:17793952282026-05-21redhat
redhatquay/quay-rhel9:17792040862026-05-19redhat
redhatpython-cryptography-main-46.0.7-1.hum12026-04-09redhat

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
cryptography45.0.0 ... 46.0.6 (15 versions)46.0.7—

Weakness Classification(2)

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

Additional Vendor Advisories

(5)

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 8× in last 7d / 39× 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 123 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 21:02 UTCOSV refresh
  4. 2026-07-20 17:08 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-15 16:57 UTCEPSS rescore
  10. 2026-07-15 16:57 UTCEPSS rescore
  11. 2026-07-15 02:23 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  12. 2026-07-15 02:00 UTCEPSS rescore
  13. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 7.3 · severity → HIGH
  14. 2026-07-13 22:30 UTCEPSS rescore
  15. 2026-07-13 06:13 UTCEPSS rescore
  16. 2026-07-13 06:13 UTCEPSS rescore
  17. 2026-07-12 05:46 UTCEPSS rescore
  18. 2026-07-11 08:27 UTCEPSS rescore
  19. 2026-07-10 12:26 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  20. 2026-07-10 12:12 UTCMITRE cvelistV5CVSS v3 → 7.3 · severity → HIGH
  21. 2026-07-09 19:10 UTCEPSS rescore
  22. 2026-07-08 15:15 UTCEPSS rescore
  23. 2026-07-07 13:46 UTCEPSS rescore
  24. 2026-07-06 16:27 UTCEPSS rescore
  25. 2026-07-06 16:27 UTCEPSS rescore
Show 75 more
  1. 2026-07-06 02:23 UTCEPSS rescore
  2. 2026-07-06 02:23 UTCEPSS rescore
  3. 2026-07-05 02:30 UTCEPSS rescore
  4. 2026-07-04 06:31 UTCEPSS rescore
  5. 2026-07-01 15:06 UTCEPSS rescore
  6. 2026-06-30 23:22 UTCEPSS rescore
  7. 2026-06-29 14:06 UTCEPSS rescore
  8. 2026-06-28 14:07 UTCEPSS rescore
  9. 2026-06-28 04:56 UTCEPSS rescore
  10. 2026-06-27 03:08 UTCEPSS rescore
  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. 2026-06-22 14:25 UTCEPSS rescore
  16. 2026-06-22 14:25 UTCEPSS rescore
  17. 2026-06-21 14:56 UTCEPSS rescore
  18. 2026-06-21 14:56 UTCEPSS rescore
  19. 2026-06-21 01:59 UTCEPSS rescore
  20. 2026-06-19 19:25 UTCEPSS rescore
  21. 2026-06-18 17:52 UTCEPSS rescore
  22. 2026-06-18 17:52 UTCEPSS rescore
  23. 2026-06-17 17:53 UTCEPSS rescore
  24. 2026-06-16 17:52 UTCEPSS rescore
  25. 2026-06-15 17:49 UTCEPSS rescore
  26. 2026-06-15 05:33 UTCVendor advisory
  27. 2026-06-14 23:18 UTCEPSS rescore
  28. 2026-06-13 23:00 UTCEPSS rescore
  29. 2026-06-12 23:12 UTCEPSS rescore
  30. 2026-06-12 23:12 UTCEPSS rescore
  31. 2026-06-12 04:59 UTCVendor advisory
  32. 2026-06-12 00:52 UTCVendor advisory
  33. 2026-06-11 20:46 UTCVendor advisory
  34. 2026-06-11 14:00 UTCEPSS rescore
  35. 2026-06-10 22:18 UTCEPSS rescore
  36. 2026-06-10 21:38 UTCVendor advisory
  37. 2026-06-10 17:31 UTCVendor advisory
  38. 2026-06-10 13:24 UTCVendor advisory
  39. 2026-06-10 13:22 UTCEPSS rescore
  40. 2026-06-10 09:17 UTCVendor advisory
  41. 2026-06-10 05:11 UTCVendor advisory
  42. 2026-06-10 01:04 UTCVendor advisory
  43. 2026-06-09 17:31 UTCVendor advisory
  44. 2026-06-09 13:15 UTCVendor advisory
  45. 2026-06-08 14:17 UTCEPSS rescore
  46. 2026-06-08 14:17 UTCEPSS rescore
  47. 2026-06-08 13:54 UTCVendor advisory
  48. 2026-06-08 09:43 UTCVendor advisory
  49. 2026-06-08 05:35 UTCVendor advisory
  50. 2026-06-08 01:27 UTCVendor advisory
  51. 2026-06-07 21:20 UTCVendor advisory
  52. 2026-06-07 17:14 UTCVendor advisory
  53. 2026-06-07 15:25 UTCEPSS rescore
  54. 2026-06-07 15:25 UTCEPSS rescore
  55. 2026-06-07 15:25 UTCEPSS rescore
  56. 2026-06-07 13:07 UTCVendor advisory
  57. 2026-06-07 08:59 UTCVendor advisory
  58. 2026-06-06 13:47 UTCEPSS rescore
  59. 2026-06-06 13:47 UTCEPSS rescore
  60. 2026-06-05 22:47 UTCEPSS rescore
  61. 2026-06-05 22:47 UTCEPSS rescore
  62. 2026-06-05 06:10 UTCEPSS rescore
  63. 2026-06-05 06:10 UTCEPSS rescore
  64. 2026-06-04 13:12 UTCEPSS rescore
  65. 2026-06-04 13:12 UTCEPSS rescore
  66. 2026-06-02 20:13 UTCEPSS rescore
  67. 2026-06-01 13:52 UTCEPSS rescore
  68. 2026-06-01 13:52 UTCEPSS rescore
  69. 2026-06-01 13:51 UTCEPSS rescore
  70. 2026-05-31 22:30 UTCEPSS rescore
  71. 2026-05-31 22:30 UTCEPSS rescore
  72. 2026-05-31 00:16 UTCEPSS rescore
  73. 2026-05-31 00:16 UTCEPSS rescore
  74. 2026-05-31 00:16 UTCEPSS rescore
  75. 2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-39892?
CVE-2026-39892 is a critical vulnerability published on April 8, 2026. cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 45.0.0 to before 46.0.7, if a non-contiguous buffer was passed to APIs which accepted Python buffers (e.g. Hash.update()), this could lead to buffer overflows. This vulnerability is fixed in…
When was CVE-2026-39892 disclosed?
CVE-2026-39892 was first published in the National Vulnerability Database on April 8, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39892 actively exploited?
CVE-2026-39892 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39892?
CVE-2026-39892 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-39892?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39892, 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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