CVE-2026-55961

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) 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: 0.1%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

wolfSSL_PKCS7_verify() returning success for a degenerate (certs-only) PKCS#7 object that contains no signer. Such an object has empty signerInfos, so the underlying signed-data verification succeeds without authenticating any content. The compatibility-layer verify path now rejects the object when no signer signature has actually been verified, so a PKCS#7 carrying no valid signature is no longer reported as verified. This is enforced regardless of the PKCS7_NOVERIFY flag, which only suppresses signer certificate chain validation and was never intended to waive the requirement that a signature exist. Only affects OpenSSL compatibility builds that call the PKCS7_verify() compatibility API on potentially degenerate PKCS#7 bundles.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
38
EG Risk 38/100

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%
EPSS PROB
0.1%
EPSS %ILE
3rd
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 2026

Advisory Details (2)

Auto-updated Jun 25, 2026
Patch available. Sources: github_pr.
genericMentions a patch (unverified)

wolfSSL Security Vulnerabilities | Documentation - wolfSSL

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

Various fixes

Fix merged in wolfSSL/wolfssl PR #10702 on 2026-06-17 — awaiting tagged release

https://github.com/wolfSSL/wolfssl/pull/10702

Vendor Advisories for CVE-2026-55961(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 rangeFix by version rangeDependents
wolfssl4.6.0+p1-0+deb11u1 ... 5.9.2-1 (40 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wolfssl5.5.4-2, 5.5.4-2+deb12u1, 5.5.4-2+deb12u2
  • every version up to 5.5.4-2+deb12u3: fixed in 5.5.4-2+deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wolfssl5.7.2-0.1, 5.7.2-0.1+deb13u1
  • every version up to 5.7.2-0.1+deb13u2: fixed in 5.7.2-0.1+deb13u2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 34× 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 245 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-55961?
CVE-2026-55961 is a high vulnerability published on June 25, 2026. wolfSSLPKCS7verify() returning success for a degenerate (certs-only) PKCS#7 object that contains no signer. Such an object has empty signerInfos, so the underlying signed-data verification succeeds without authenticating any content. The compatibility-layer verify path now rejects the object when…
When was CVE-2026-55961 disclosed?
CVE-2026-55961 was first published 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-2026-55961 actively exploited?
CVE-2026-55961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55961?
CVE-2026-55961 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-55961?
A fix for CVE-2026-55961 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55961 are linked in the Vendor Advisories panel on this page.

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