CVE-2026-59639

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-03. 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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: 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, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 28, 2026

Advisory Details (2)

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

commit 99ddc6dcc678 (bcgit/bc-java)

Fix landed in bcgit/bc-java commit 99ddc6dcc678 — awaiting tagged release

https://github.com/bcgit/bc-java/commit/99ddc6dcc6782e6a76b0dd587c77e62eb7096ad0
generic

Home · bcgit/bc-java Wiki · GitHub

https://github.com/bcgit/bc-java/wiki/CVE-2026-59639

Vendor Advisories for CVE-2026-59639(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 24× in last 7d / 99× 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 176 total refreshes for this CVE.

  1. 2026-09-19 17:56 UTCEG score recompute
  2. 2026-09-19 17:56 UTCGHSA enrichment
  3. 2026-09-19 03:52 UTCEG score recompute
  4. 2026-09-19 03:52 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 13:20 UTCGHSA enrichment
  7. 2026-09-18 01:13 UTCEG score recompute
  8. 2026-09-18 01:13 UTCGHSA enrichment
  9. 2026-09-17 19:31 UTCEPSS rescore
  10. 2026-09-17 01:16 UTCEG score recompute
  11. 2026-09-17 01:16 UTCGHSA enrichment
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:20 UTCEG score recompute
  14. 2026-09-16 05:20 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 17:09 UTCEG score recompute
  17. 2026-09-15 17:09 UTCGHSA enrichment
  18. 2026-09-15 03:11 UTCEPSS rescore
  19. 2026-09-15 02:05 UTCGHSA enrichment
  20. 2026-09-14 08:55 UTCGHSA enrichment
  21. 2026-09-13 20:49 UTCEG score recompute
  22. 2026-09-13 20:49 UTCGHSA enrichment
  23. 2026-09-13 16:47 UTCEPSS rescore
  24. 2026-09-13 08:43 UTCGHSA enrichment
  25. 2026-09-12 20:37 UTCEG score recompute
Show 75 more
  1. 2026-09-12 20:37 UTCGHSA enrichment
  2. 2026-09-12 08:30 UTCGHSA enrichment
  3. 2026-09-11 20:24 UTCEG score recompute
  4. 2026-09-11 20:24 UTCGHSA enrichment
  5. 2026-09-11 08:01 UTCGHSA enrichment
  6. 2026-09-10 19:55 UTCEG score recompute
  7. 2026-09-10 19:55 UTCGHSA enrichment
  8. 2026-09-10 09:35 UTCEPSS rescore
  9. 2026-09-10 07:49 UTCGHSA enrichment
  10. 2026-09-09 19:42 UTCGHSA enrichment
  11. 2026-09-09 06:51 UTCEG score recompute
  12. 2026-09-09 06:51 UTCGHSA enrichment
  13. 2026-09-08 22:01 UTCEPSS rescore
  14. 2026-09-07 19:04 UTCEG score recompute
  15. 2026-09-07 19:04 UTCGHSA enrichment
  16. 2026-09-07 16:01 UTCEPSS rescore
  17. 2026-09-06 18:54 UTCEG score recompute
  18. 2026-09-06 18:54 UTCGHSA enrichment
  19. 2026-09-06 13:47 UTCEPSS rescore
  20. 2026-09-06 06:47 UTCGHSA enrichment
  21. 2026-09-05 18:41 UTCEG score recompute
  22. 2026-09-05 18:41 UTCGHSA enrichment
  23. 2026-09-05 04:31 UTCEG score recompute
  24. 2026-09-05 04:31 UTCGHSA enrichment
  25. 2026-09-04 10:19 UTCEG score recompute
  26. 2026-09-04 10:18 UTCGHSA enrichment
  27. 2026-09-04 05:07 UTCEPSS rescore
  28. 2026-09-03 21:09 UTCGHSA enrichment
  29. 2026-09-03 08:59 UTCEG score recompute
  30. 2026-09-03 08:59 UTCGHSA enrichment
  31. 2026-09-02 14:12 UTCEPSS rescore
  32. 2026-09-01 22:21 UTCEG score recompute
  33. 2026-09-01 22:21 UTCGHSA enrichment
  34. 2026-09-01 13:54 UTCEPSS rescore
  35. 2026-09-01 04:40 UTCEPSS rescore
  36. 2026-08-31 23:16 UTCGHSA enrichment
  37. 2026-08-30 22:19 UTCEG score recompute
  38. 2026-08-30 22:19 UTCGHSA enrichment
  39. 2026-08-30 19:17 UTCEPSS rescore
  40. 2026-08-30 10:13 UTCEG score recompute
  41. 2026-08-30 10:13 UTCGHSA enrichment
  42. 2026-08-30 01:22 UTCEPSS rescore
  43. 2026-08-29 22:07 UTCEG score recompute
  44. 2026-08-29 22:07 UTCGHSA enrichment
  45. 2026-08-28 21:42 UTCEPSS rescore
  46. 2026-08-28 15:58 UTCEG score recompute▼ 1.20
  47. 2026-08-28 15:58 UTCGHSA enrichment
  48. 2026-08-28 15:48 UTCNVD updateCVSS v3 → 7.5
  49. 2026-08-27 22:45 UTCEG score recompute
  50. 2026-08-27 22:45 UTCGHSA enrichment
  51. 2026-08-27 14:25 UTCEPSS rescore
  52. 2026-08-27 10:39 UTCGHSA enrichment
  53. 2026-08-26 22:33 UTCEG score recompute
  54. 2026-08-26 22:33 UTCGHSA enrichment
  55. 2026-08-26 14:46 UTCEPSS rescore
  56. 2026-08-26 10:27 UTCGHSA enrichment
  57. 2026-08-25 21:56 UTCEG score recompute
  58. 2026-08-25 21:56 UTCGHSA enrichment
  59. 2026-08-25 13:49 UTCEPSS rescore
  60. 2026-08-25 09:10 UTCGHSA enrichment
  61. 2026-08-24 21:04 UTCEG score recompute
  62. 2026-08-24 21:04 UTCGHSA enrichment
  63. 2026-08-24 08:58 UTCGHSA enrichment
  64. 2026-08-23 20:52 UTCGHSA enrichment
  65. 2026-08-23 08:46 UTCEG score recompute
  66. 2026-08-23 08:46 UTCGHSA enrichment
  67. 2026-08-23 00:19 UTCEPSS rescore
  68. 2026-08-22 20:40 UTCGHSA enrichment
  69. 2026-08-22 08:34 UTCEG score recompute
  70. 2026-08-22 08:34 UTCGHSA enrichment
  71. 2026-08-21 23:49 UTCEPSS rescore
  72. 2026-08-21 20:28 UTCGHSA enrichment
  73. 2026-08-21 08:22 UTCEG score recompute
  74. 2026-08-21 08:22 UTCGHSA enrichment
  75. 2026-08-20 22:55 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59639?
CVE-2026-59639 is a high vulnerability published on August 3, 2026. In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X…
When was CVE-2026-59639 disclosed?
CVE-2026-59639 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-2026-59639 actively exploited?
CVE-2026-59639 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 94.0% of all scored CVEs.
What is the CVSS score of CVE-2026-59639?
CVE-2026-59639 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-59639?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59639, 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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