CVE-2026-59644

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 82% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

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

In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 4, 2026

Advisory Details (2)

Auto-updated Aug 3, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 610d8757d855 (bcgit/bc-java)

Fix landed in bcgit/bc-java commit 610d8757d855 — awaiting tagged release

https://github.com/bcgit/bc-java/commit/610d8757d855afe197df0de6d831cb75c81e3b9f
generic

Home · bcgit/bc-java Wiki · GitHub

https://github.com/bcgit/bc-java/wiki/CVE-2026-59644

Vendor Advisories for CVE-2026-59644(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
bouncycastle1.68-2 ... 1.80-3 (12 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
bouncycastle1.72-2, 1.77-1, 1.80-1, 1.80-2, 1.80-3——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
bouncycastle1.80-3——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
bouncycastle1.80-3——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 83× 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. 2026-08-21 04:56 UTCEG score recompute
  2. 2026-08-21 04:56 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 17:38 UTCGHSA enrichment
  5. 2026-08-20 06:20 UTCGHSA enrichment
  6. 2026-08-19 19:01 UTCEG score recompute
  7. 2026-08-19 19:01 UTCGHSA enrichment
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-19 06:24 UTCGHSA enrichment
  10. 2026-08-18 18:54 UTCEG score recompute
  11. 2026-08-18 18:54 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 07:35 UTCGHSA enrichment
  14. 2026-08-17 20:13 UTCEG score recompute
  15. 2026-08-17 20:12 UTCGHSA enrichment
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 08:52 UTCGHSA enrichment
  18. 2026-08-16 21:34 UTCEG score recompute
  19. 2026-08-16 21:34 UTCGHSA enrichment
  20. 2026-08-16 14:56 UTCEPSS rescore
  21. 2026-08-16 10:15 UTCEG score recompute
  22. 2026-08-16 10:15 UTCGHSA enrichment
  23. 2026-08-16 02:14 UTCEPSS rescore
  24. 2026-08-15 22:58 UTCGHSA enrichment
  25. 2026-08-15 11:40 UTCEG score recompute
Show 58 more
  1. 2026-08-15 11:40 UTCGHSA enrichment
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-15 00:21 UTCGHSA enrichment
  4. 2026-08-14 13:03 UTCGHSA enrichment
  5. 2026-08-14 01:45 UTCEG score recompute
  6. 2026-08-14 01:45 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 14:27 UTCGHSA enrichment
  9. 2026-08-13 03:05 UTCGHSA enrichment
  10. 2026-08-12 15:47 UTCEG score recompute
  11. 2026-08-12 15:47 UTCGHSA enrichment
  12. 2026-08-12 13:51 UTCEPSS rescore
  13. 2026-08-12 04:29 UTCGHSA enrichment
  14. 2026-08-11 17:06 UTCEG score recompute
  15. 2026-08-11 17:06 UTCGHSA enrichment
  16. 2026-08-11 05:48 UTCEG score recompute
  17. 2026-08-11 05:48 UTCGHSA enrichment
  18. 2026-08-11 00:00 UTCEPSS rescore
  19. 2026-08-10 18:30 UTCGHSA enrichment
  20. 2026-08-10 07:12 UTCGHSA enrichment
  21. 2026-08-09 19:54 UTCEG score recompute
  22. 2026-08-09 19:54 UTCGHSA enrichment
  23. 2026-08-09 13:46 UTCEPSS rescore
  24. 2026-08-09 08:36 UTCGHSA enrichment
  25. 2026-08-08 21:18 UTCEG score recompute
  26. 2026-08-08 21:18 UTCGHSA enrichment
  27. 2026-08-08 16:37 UTCEPSS rescore
  28. 2026-08-08 09:59 UTCGHSA enrichment
  29. 2026-08-07 22:41 UTCEG score recompute
  30. 2026-08-07 22:41 UTCGHSA enrichment
  31. 2026-08-07 11:23 UTCGHSA enrichment
  32. 2026-08-07 00:05 UTCEG score recompute
  33. 2026-08-07 00:04 UTCGHSA enrichment
  34. 2026-08-06 13:47 UTCEPSS rescore
  35. 2026-08-06 12:47 UTCGHSA enrichment
  36. 2026-08-06 01:28 UTCEG score recompute
  37. 2026-08-06 01:28 UTCGHSA enrichment
  38. 2026-08-05 19:17 UTCEPSS rescore
  39. 2026-08-05 14:10 UTCGHSA enrichment
  40. 2026-08-05 02:15 UTCEG score recompute
  41. 2026-08-05 02:15 UTCGHSA enrichment
  42. 2026-08-04 15:10 UTCEPSS rescore
  43. 2026-08-04 14:54 UTCGHSA enrichment
  44. 2026-08-04 14:13 UTCEG score recompute
  45. 2026-08-04 14:13 UTCGHSA enrichment
  46. 2026-08-04 10:39 UTCEPSS rescore
  47. 2026-08-04 02:52 UTCGHSA enrichment
  48. 2026-08-03 15:34 UTCEG score recompute
  49. 2026-08-03 15:34 UTCGHSA enrichment
  50. 2026-08-03 14:29 UTCEG score recompute
  51. 2026-08-03 14:29 UTCGHSA enrichment
  52. 2026-08-03 06:23 UTCEG score recompute
  53. 2026-08-03 06:23 UTCGHSA enrichment
  54. 2026-08-03 05:25 UTCEG score recompute
  55. 2026-08-03 05:25 UTCGHSA enrichment
  56. 2026-08-03 01:21 UTCEG score recompute
  57. 2026-08-03 01:04 UTCEG score recompute
  58. 2026-08-03 01:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-59644?
CVE-2026-59644 is a high vulnerability published on August 3, 2026. In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.
When was CVE-2026-59644 disclosed?
CVE-2026-59644 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59644 actively exploited?
CVE-2026-59644 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 81.7% of all scored CVEs.
What is the CVSS score of CVE-2026-59644?
CVE-2026-59644 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-59644?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59644, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-59644

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