CVE-2026-12852

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: 0.3%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bounds check.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 3, 2026

Last Modified

August 28, 2026

Advisory Details (2)

Auto-updated Aug 3, 2026
Patch available. Sources: github_commit.
github_commit

commit a747038bb5bb (bcgit/bc-java)

Fix landed in bcgit/bc-java commit a747038bb5bb — awaiting tagged release

https://github.com/bcgit/bc-java/commit/a747038bb5bbd5e29fb2b7607ab38af1fd8d1790
generic

Home · bcgit/bc-java Wiki · GitHub

https://github.com/bcgit/bc-java/wiki/CVE-2026-12852

Vendor Advisories for CVE-2026-12852(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 rangeFix by version rangeDependents
bouncycastle1.68-2 ... 1.80-3 (12 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
bouncycastle1.72-2 ... 1.86-1 (6 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
bouncycastle1.80-3, 1.86-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
bouncycastle1.80-3
  • every version up to 1.86-1: fixed in 1.86-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× 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 210 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-12852?
CVE-2026-12852 is a high vulnerability published on August 3, 2026. In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bounds check.
When was CVE-2026-12852 disclosed?
CVE-2026-12852 was first published 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-2026-12852 actively exploited?
CVE-2026-12852 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-12852?
CVE-2026-12852 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-12852?
A fix for CVE-2026-12852 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-12852 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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