CVE-2026-6731

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory published 2026-06-25. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 27, 2026

Advisory Details (2)

Auto-updated Jun 26, 2026
Patch available. Sources: github_pr.
generic Patch Available

wolfSSL Security Vulnerabilities | Documentation - wolfSSL

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

CN constraints fix

Fix merged in wolfSSL/wolfssl PR #10223 on 2026-04-19 — awaiting tagged release

https://github.com/wolfSSL/wolfssl/pull/10223

Vendor Advisories for CVE-2026-6731(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, 5.5.4-2+deb12u1, 5.5.4-2+deb12u25.5.4-2+deb12u3—
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 6× in last 7d / 61× 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 200 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-6731?
CVE-2026-6731 is a high vulnerability published on June 25, 2026. X.509 name constraint bypass via the Subject Common Name when treated as a DNS-type name. A certificate whose Subject CN violates an issuing CA's DNS name constraints could be accepted.
When was CVE-2026-6731 disclosed?
CVE-2026-6731 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-6731 actively exploited?
CVE-2026-6731 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 89.5% of all scored CVEs.
What is the CVSS score of CVE-2026-6731?
CVE-2026-6731 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-6731?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-6731, 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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