CVE-2026-59641

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory (severity: HIGH) published 2026-08-03. NVD baseline CVSS 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: 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, S/MIME validator trusts signer-asserted signingTime for path validation. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcmail-fips and bcjmail-fips 1.0.7 (1.0.X series), 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
4%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 28, 2026

Advisory Details (3)

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

commit fd89fe918b37 (bcgit/bc-java)

Fix landed in bcgit/bc-java commit fd89fe918b37 — awaiting tagged release

https://github.com/bcgit/bc-java/commit/fd89fe918b37fea1c71e95fae50284a325b09721
github_commit

commit 2f81b22d559b (bcgit/bc-java)

Fix landed in bcgit/bc-java commit 2f81b22d559b — awaiting tagged release

https://github.com/bcgit/bc-java/commit/2f81b22d559b3a1b026388e1ca78dd547384def8
generic

Home · bcgit/bc-java Wiki · GitHub

https://github.com/bcgit/bc-java/wiki/CVE-2026-59641

Vendor Advisories for CVE-2026-59641(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 17× in last 7d / 82× 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 160 total refreshes for this CVE.

  1. 2026-09-19 03:52 UTCEG score recompute
  2. 2026-09-19 03:52 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 01:13 UTCEG score recompute
  5. 2026-09-18 01:13 UTCGHSA enrichment
  6. 2026-09-17 19:31 UTCEPSS rescore
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 11:18 UTCEG score recompute
  9. 2026-09-16 11:18 UTCGHSA enrichment
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 09:31 UTCEG score recompute
  12. 2026-09-15 09:31 UTCGHSA enrichment
  13. 2026-09-15 03:11 UTCEPSS rescore
  14. 2026-09-14 09:06 UTCEG score recompute
  15. 2026-09-14 09:06 UTCGHSA enrichment
  16. 2026-09-13 16:47 UTCEPSS rescore
  17. 2026-09-13 08:41 UTCGHSA enrichment
  18. 2026-09-12 08:16 UTCEG score recompute
  19. 2026-09-12 08:16 UTCGHSA enrichment
  20. 2026-09-11 14:53 UTCEPSS rescore
  21. 2026-09-11 07:44 UTCEG score recompute
  22. 2026-09-11 07:44 UTCGHSA enrichment
  23. 2026-09-10 09:35 UTCEPSS rescore
  24. 2026-09-10 07:18 UTCGHSA enrichment
  25. 2026-09-09 06:51 UTCEG score recompute
Show 75 more
  1. 2026-09-09 06:51 UTCGHSA enrichment
  2. 2026-09-08 22:01 UTCEPSS rescore
  3. 2026-09-07 19:04 UTCEG score recompute
  4. 2026-09-07 19:04 UTCGHSA enrichment
  5. 2026-09-07 16:01 UTCEPSS rescore
  6. 2026-09-06 13:47 UTCEPSS rescore
  7. 2026-09-06 11:51 UTCEG score recompute
  8. 2026-09-06 11:51 UTCGHSA enrichment
  9. 2026-09-05 11:26 UTCEG score recompute
  10. 2026-09-05 11:26 UTCGHSA enrichment
  11. 2026-09-04 10:19 UTCEG score recompute
  12. 2026-09-04 10:18 UTCGHSA enrichment
  13. 2026-09-04 05:07 UTCEPSS rescore
  14. 2026-09-03 08:59 UTCEG score recompute
  15. 2026-09-03 08:59 UTCGHSA enrichment
  16. 2026-09-02 14:12 UTCEPSS rescore
  17. 2026-09-01 23:41 UTCEG score recompute
  18. 2026-09-01 23:41 UTCGHSA enrichment
  19. 2026-09-01 13:54 UTCEPSS rescore
  20. 2026-09-01 04:40 UTCEPSS rescore
  21. 2026-08-31 23:16 UTCGHSA enrichment
  22. 2026-08-30 22:33 UTCEG score recompute
  23. 2026-08-30 22:33 UTCGHSA enrichment
  24. 2026-08-30 19:17 UTCEPSS rescore
  25. 2026-08-30 01:22 UTCEPSS rescore
  26. 2026-08-29 22:08 UTCEG score recompute
  27. 2026-08-29 22:08 UTCGHSA enrichment
  28. 2026-08-28 21:42 UTCEPSS rescore
  29. 2026-08-28 18:15 UTCEG score recompute▼ 3.40
  30. 2026-08-28 18:15 UTCGHSA enrichment
  31. 2026-08-28 18:13 UTCNVD updateCVSS v3 → 5.3 · severity → MEDIUM
  32. 2026-08-27 21:16 UTCEG score recompute
  33. 2026-08-27 21:16 UTCGHSA enrichment
  34. 2026-08-27 14:25 UTCEPSS rescore
  35. 2026-08-27 09:42 UTCGHSA enrichment
  36. 2026-08-26 22:07 UTCEG score recompute
  37. 2026-08-26 22:07 UTCGHSA enrichment
  38. 2026-08-26 14:46 UTCEPSS rescore
  39. 2026-08-26 10:27 UTCGHSA enrichment
  40. 2026-08-25 21:59 UTCEG score recompute
  41. 2026-08-25 21:59 UTCGHSA enrichment
  42. 2026-08-25 13:49 UTCEPSS rescore
  43. 2026-08-25 10:21 UTCGHSA enrichment
  44. 2026-08-24 22:46 UTCEG score recompute
  45. 2026-08-24 22:46 UTCGHSA enrichment
  46. 2026-08-24 11:11 UTCEG score recompute
  47. 2026-08-24 11:11 UTCGHSA enrichment
  48. 2026-08-23 23:37 UTCGHSA enrichment
  49. 2026-08-23 12:02 UTCGHSA enrichment
  50. 2026-08-23 00:28 UTCGHSA enrichment
  51. 2026-08-22 12:52 UTCGHSA enrichment
  52. 2026-08-22 01:16 UTCEG score recompute
  53. 2026-08-22 01:16 UTCGHSA enrichment
  54. 2026-08-21 23:49 UTCEPSS rescore
  55. 2026-08-21 13:40 UTCGHSA enrichment
  56. 2026-08-21 01:57 UTCEG score recompute
  57. 2026-08-21 01:57 UTCGHSA enrichment
  58. 2026-08-20 22:55 UTCEPSS rescore
  59. 2026-08-20 14:22 UTCGHSA enrichment
  60. 2026-08-20 02:43 UTCEG score recompute
  61. 2026-08-20 02:43 UTCGHSA enrichment
  62. 2026-08-19 17:04 UTCEPSS rescore
  63. 2026-08-19 14:59 UTCGHSA enrichment
  64. 2026-08-19 03:25 UTCGHSA enrichment
  65. 2026-08-18 15:49 UTCGHSA enrichment
  66. 2026-08-18 03:34 UTCGHSA enrichment
  67. 2026-08-17 15:37 UTCEG score recompute
  68. 2026-08-17 15:37 UTCGHSA enrichment
  69. 2026-08-17 13:47 UTCEPSS rescore
  70. 2026-08-17 04:03 UTCGHSA enrichment
  71. 2026-08-16 16:28 UTCEG score recompute
  72. 2026-08-16 16:28 UTCGHSA enrichment
  73. 2026-08-16 14:56 UTCEPSS rescore
  74. 2026-08-16 04:54 UTCEG score recompute
  75. 2026-08-16 04:54 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59641?
CVE-2026-59641 is a medium vulnerability published on August 3, 2026. In Bouncy Castle for Java before 1.85, S/MIME validator trusts signer-asserted signingTime for path validation. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcmail-fips and bcjmail-fips 1.0.7 (1.0.X series), 2.0.7 (2.0.X series)…
When was CVE-2026-59641 disclosed?
CVE-2026-59641 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59641 actively exploited?
CVE-2026-59641 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 95.7% of all scored CVEs.
What is the CVSS score of CVE-2026-59641?
CVE-2026-59641 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-59641?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59641, 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-2026-59641

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