CVE-2026-7531

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH 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
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 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(high)
EPSS
26.6%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jul 3, 2026
Patch available. Sources: github_pr.
generic Patch 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 86× in last 7d / 100× 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 02:58 UTCEG score recompute
  2. 2026-07-07 02:58 UTCGHSA enrichment
  3. 2026-07-06 22:35 UTCEG score recompute
  4. 2026-07-06 22:35 UTCGHSA enrichment
  5. 2026-07-06 18:13 UTCEG score recompute
  6. 2026-07-06 18:12 UTCGHSA enrichment
  7. 2026-07-06 16:27 UTCEPSS rescore
  8. 2026-07-06 16:27 UTCEPSS rescore
  9. 2026-07-06 13:31 UTCEG score recompute
  10. 2026-07-06 13:31 UTCGHSA enrichment
  11. 2026-07-06 09:05 UTCEG score recompute
  12. 2026-07-06 09:05 UTCGHSA enrichment
  13. 2026-07-06 04:29 UTCEG score recompute
  14. 2026-07-06 04:29 UTCGHSA enrichment
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-06 02:23 UTCEPSS rescore
  17. 2026-07-05 23:54 UTCEG score recompute
  18. 2026-07-05 23:54 UTCGHSA enrichment
  19. 2026-07-05 19:31 UTCEG score recompute
  20. 2026-07-05 19:31 UTCGHSA enrichment
  21. 2026-07-05 15:09 UTCEG score recompute
  22. 2026-07-05 15:09 UTCGHSA enrichment
  23. 2026-07-05 10:47 UTCEG score recompute
  24. 2026-07-05 10:47 UTCGHSA enrichment
  25. 2026-07-05 06:24 UTCEG score recompute
Show 75 more
  1. 2026-07-05 06:24 UTCGHSA enrichment
  2. 2026-07-05 02:31 UTCEPSS rescore
  3. 2026-07-05 02:30 UTCEPSS rescore
  4. 2026-07-05 01:58 UTCEG score recompute
  5. 2026-07-05 01:58 UTCGHSA enrichment
  6. 2026-07-04 21:36 UTCEG score recompute
  7. 2026-07-04 21:36 UTCGHSA enrichment
  8. 2026-07-04 17:14 UTCEG score recompute
  9. 2026-07-04 17:14 UTCGHSA enrichment
  10. 2026-07-04 12:51 UTCEG score recompute
  11. 2026-07-04 12:51 UTCGHSA enrichment
  12. 2026-07-04 08:29 UTCEG score recompute
  13. 2026-07-04 08:28 UTCGHSA enrichment
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-04 06:31 UTCEPSS rescore
  16. 2026-07-04 04:05 UTCEG score recompute
  17. 2026-07-04 04:04 UTCGHSA enrichment
  18. 2026-07-03 23:11 UTCEG score recompute
  19. 2026-07-03 23:11 UTCGHSA enrichment
  20. 2026-07-03 18:37 UTCEG score recompute
  21. 2026-07-03 18:37 UTCGHSA enrichment
  22. 2026-07-03 14:15 UTCEG score recompute
  23. 2026-07-03 14:15 UTCGHSA enrichment
  24. 2026-07-03 09:52 UTCEG score recompute
  25. 2026-07-03 09:52 UTCGHSA enrichment
  26. 2026-07-03 05:29 UTCEG score recompute
  27. 2026-07-03 05:29 UTCGHSA enrichment
  28. 2026-07-03 00:53 UTCEG score recompute
  29. 2026-07-03 00:53 UTCGHSA enrichment
  30. 2026-07-02 20:30 UTCEG score recompute
  31. 2026-07-02 20:30 UTCGHSA enrichment
  32. 2026-07-02 16:08 UTCEG score recompute
  33. 2026-07-02 16:08 UTCGHSA enrichment
  34. 2026-07-02 11:45 UTCEG score recompute
  35. 2026-07-02 11:45 UTCGHSA enrichment
  36. 2026-07-02 07:23 UTCEG score recompute
  37. 2026-07-02 07:23 UTCGHSA enrichment
  38. 2026-07-02 03:01 UTCEG score recompute
  39. 2026-07-02 03:01 UTCGHSA enrichment
  40. 2026-07-01 22:39 UTCEG score recompute
  41. 2026-07-01 22:39 UTCGHSA enrichment
  42. 2026-07-01 18:17 UTCEG score recompute
  43. 2026-07-01 18:17 UTCGHSA enrichment
  44. 2026-07-01 15:07 UTCEPSS rescore
  45. 2026-07-01 13:54 UTCEG score recompute
  46. 2026-07-01 13:54 UTCGHSA enrichment
  47. 2026-07-01 09:32 UTCEG score recompute
  48. 2026-07-01 09:32 UTCGHSA enrichment
  49. 2026-07-01 05:10 UTCEG score recompute
  50. 2026-07-01 05:10 UTCGHSA enrichment
  51. 2026-07-01 00:48 UTCEG score recompute
  52. 2026-07-01 00:48 UTCGHSA enrichment
  53. 2026-06-30 23:22 UTCEPSS rescore
  54. 2026-06-30 20:26 UTCEG score recompute
  55. 2026-06-30 20:26 UTCGHSA enrichment
  56. 2026-06-30 16:04 UTCEG score recompute
  57. 2026-06-30 16:04 UTCGHSA enrichment
  58. 2026-06-30 11:41 UTCEG score recompute
  59. 2026-06-30 11:41 UTCGHSA enrichment
  60. 2026-06-30 07:18 UTCEG score recompute
  61. 2026-06-30 07:18 UTCGHSA enrichment
  62. 2026-06-30 02:56 UTCEG score recompute
  63. 2026-06-30 02:56 UTCGHSA enrichment
  64. 2026-06-29 22:31 UTCEG score recompute▲ 7.50
  65. 2026-06-29 22:31 UTCGHSA enrichment
  66. 2026-06-29 14:06 UTCEPSS rescore
  67. 2026-06-28 14:07 UTCEPSS rescore
  68. 2026-06-28 04:56 UTCEPSS rescore
  69. 2026-06-27 03:08 UTCEPSS rescore
  70. 2026-06-26 17:41 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  71. 2026-06-26 15:45 UTCEG score recompute▲ 2.30
  72. 2026-06-26 15:45 UTCGHSA enrichment
  73. 2026-06-26 15:40 UTCNVD updateCVSS v3 → 2.3 · CVSS v4 → 2.3
  74. 2026-06-25 21:46 UTCEG score recompute
  75. 2026-06-25 21:46 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 26.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

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