CVE-2026-5194

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-09. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

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

Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication if the public CA key used is also known. This affects ECDSA/ECC verification when EdDSA or ML-DSA is also enabled.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
37.5%
KEV
Not listed

Published

April 9, 2026

Last Modified

May 23, 2026

Advisory Details (2)

Auto-updated May 28, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic

Project Glasswing: An initial update \ Anthropic

https://www.anthropic.com/research/glasswing-initial-update
github_pr

20260403-WC_FIPS_186

Fix merged in wolfSSL/wolfssl PR #10131 on 2026-04-06 — awaiting tagged release

https://github.com/wolfSSL/wolfssl/pull/10131

Vendor Advisories for CVE-2026-5194(1)

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-5194?
CVE-2026-5194 is a critical vulnerability published on April 9, 2026. Missing hash/digest size and OID checks allow digests smaller than allowed when verifying ECDSA certificates, or smaller than is appropriate for the relevant key type, to be accepted by signature verification functions. This could lead to reduced security of ECDSA certificate-based authentication…
When was CVE-2026-5194 disclosed?
CVE-2026-5194 was first published in the National Vulnerability Database on April 9, 2026, with the most recent update on May 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5194 actively exploited?
CVE-2026-5194 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5194?
CVE-2026-5194 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-5194?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5194, 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.

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