CVE-2026-7531

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: LOW) published 2026-06-25. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Use-after-free in PQC hybrid key-share handling. This is an incomplete-fix follow-up to CVE-2026-5460 (released in 5.9.1): a malicious TLS 1.3 server sending a truncated PQC hybrid KeyShare can still trigger the error cleanup path to operate on freed memory.

CVSS v3
9.8
EG Score
9.8(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
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Sep 6, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr.
generic Patch Available🟡 PoC Available

wolfSSL Security Vulnerabilities | Documentation - wolfSSL

https://www.wolfssl.com/docs/security-vulnerabilities/
github_pr

Hardening in TLSX_KeyShare_ProcessPqcHybridClient

Fix merged in wolfSSL/wolfssl PR #10327 on 2026-05-05 — awaiting tagged release

https://github.com/wolfSSL/wolfssl/pull/10327

Vendor Advisories for CVE-2026-7531(2)

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

Affected Packages

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
wolfssl4.6.0+p1-0+deb11u1 ... 5.9.2-1 (40 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
wolfssl5.5.4-2 ... 5.9.2-1 (27 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
wolfssl5.7.2-0.1 ... 5.9.2-1 (14 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 4× in last 7d / 101× 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 370 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-7531?
CVE-2026-7531 is a critical vulnerability published on June 25, 2026. Use-after-free in PQC hybrid key-share handling. This is an incomplete-fix follow-up to CVE-2026-5460 (released in 5.9.1): a malicious TLS 1.3 server sending a truncated PQC hybrid KeyShare can still trigger the error cleanup path to operate on freed memory.
When was CVE-2026-7531 disclosed?
CVE-2026-7531 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7531 actively exploited?
CVE-2026-7531 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 58.9% of all scored CVEs.
What is the CVSS score of CVE-2026-7531?
CVE-2026-7531 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-7531?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7531, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-7531

Explore →

Is Your Infrastructure Affected by CVE-2026-7531?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs