CVE-2026-55967

HIGHNVD 7.57.5—
EchelonGraph scoreHIGH confidence

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

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

AES-GCM encryption/decryption with extremely large cumulative single message sizes (>64 GiB) were not properly rejected by the streaming APIs, allowing counter wrap, keystream reuse, and consequent plaintext recovery.

CVSS v3
7.5
EG Score
7.5(high)
EPSS
1.8%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 26, 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

20260616-aes-fixes

Fix merged in wolfSSL/wolfssl PR #10709 on 2026-06-17 — awaiting tagged release

https://github.com/wolfSSL/wolfssl/pull/10709

Vendor Advisories for CVE-2026-55967(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 38× in last 7d / 58× 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 02:18 UTCEG score recompute
  2. 2026-07-07 02:18 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 14:38 UTCEG score recompute
  6. 2026-07-06 14:37 UTCGHSA enrichment
  7. 2026-07-06 02:54 UTCEG score recompute
  8. 2026-07-06 02:54 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 15:14 UTCEG score recompute
  12. 2026-07-05 15:14 UTCGHSA enrichment
  13. 2026-07-05 03:35 UTCEG score recompute
  14. 2026-07-05 03:34 UTCGHSA enrichment
  15. 2026-07-05 02:31 UTCEPSS rescore
  16. 2026-07-05 02:30 UTCEPSS rescore
  17. 2026-07-04 15:54 UTCEG score recompute
  18. 2026-07-04 15:54 UTCGHSA enrichment
  19. 2026-07-04 06:31 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-04 04:15 UTCEG score recompute
  22. 2026-07-04 04:14 UTCGHSA enrichment
  23. 2026-07-03 16:35 UTCEG score recompute
  24. 2026-07-03 16:35 UTCGHSA enrichment
  25. 2026-07-03 04:56 UTCEG score recompute
Show 33 more
  1. 2026-07-03 04:56 UTCGHSA enrichment
  2. 2026-07-02 17:17 UTCEG score recompute
  3. 2026-07-02 17:17 UTCGHSA enrichment
  4. 2026-07-02 05:37 UTCEG score recompute
  5. 2026-07-02 05:37 UTCGHSA enrichment
  6. 2026-07-01 17:57 UTCEG score recompute
  7. 2026-07-01 17:57 UTCGHSA enrichment
  8. 2026-07-01 15:07 UTCEPSS rescore
  9. 2026-07-01 06:18 UTCEG score recompute
  10. 2026-07-01 06:18 UTCGHSA enrichment
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 18:38 UTCEG score recompute
  13. 2026-06-30 18:38 UTCGHSA enrichment
  14. 2026-06-30 06:58 UTCEG score recompute
  15. 2026-06-30 06:58 UTCGHSA enrichment
  16. 2026-06-29 19:15 UTCEG score recompute
  17. 2026-06-29 19:15 UTCGHSA enrichment
  18. 2026-06-29 14:06 UTCEPSS rescore
  19. 2026-06-29 14:06 UTCEPSS rescore
  20. 2026-06-29 07:35 UTCEG score recompute
  21. 2026-06-29 07:35 UTCGHSA enrichment
  22. 2026-06-28 19:55 UTCEG score recompute▲ 5.50
  23. 2026-06-28 19:55 UTCGHSA enrichment
  24. 2026-06-28 14:07 UTCEPSS rescore
  25. 2026-06-28 04:56 UTCEPSS rescore
  26. 2026-06-28 04:56 UTCEPSS rescore
  27. 2026-06-27 03:08 UTCEPSS rescore
  28. 2026-06-26 17:41 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  29. 2026-06-25 19:50 UTCEG score recompute▲ 2.00
  30. 2026-06-25 19:50 UTCGHSA enrichment
  31. 2026-06-25 19:49 UTCNVD updateCVSS v3 → 2 · CVSS v4 → 2
  32. 2026-06-25 18:46 UTCEG score recompute
  33. 2026-06-25 18:46 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-55967?
CVE-2026-55967 is a high vulnerability published on June 25, 2026. AES-GCM encryption/decryption with extremely large cumulative single message sizes (>64 GiB) were not properly rejected by the streaming APIs, allowing counter wrap, keystream reuse, and consequent plaintext recovery.
When was CVE-2026-55967 disclosed?
CVE-2026-55967 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-2026-55967 actively exploited?
CVE-2026-55967 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55967?
CVE-2026-55967 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-55967?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55967, 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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