CVE-2026-13506

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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

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
0.4%
EPSS %ILE
36th
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 77454da9b3dc (bcgit/bc-java)

Fix landed in bcgit/bc-java commit 77454da9b3dc — awaiting tagged release

https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84
generic

Home · bcgit/bc-java Wiki · GitHub

https://github.com/bcgit/bc-java/wiki/CVE-2026-13506

Vendor Advisories for CVE-2026-13506(1)

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

Affected Packages

(8 across 5 ecosystems)
Maven(4)
PackageVulnerable rangeFix by version rangeDependents
org.bouncycastle:bc-fips2.1.0, 2.1.1, 2.1.2
  • every version up to 1.0.2.7: fixed in 1.0.2.7
  • 2.0.0 up to 2.0.2: fixed in 2.0.2
  • 2.1.0 up to 2.1.3: fixed in 2.1.3
—
org.bouncycastle:bcprov-jdk15to181.63 ... 1.84 (23 versions)
  • every version up to 1.85: fixed in 1.85
—
org.bouncycastle:bcprov-jdk18on1.71 ... 1.84 (18 versions)
  • every version up to 1.85: fixed in 1.85
—
org.bouncycastle:bcprov-lts8on2.73.0 ... 2.73.9 (12 versions)
  • every version up to 2.73.12: fixed in 2.73.12
—
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 12× in last 7d / 63× 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 186 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-13506?
CVE-2026-13506 is a high vulnerability published on August 3, 2026. In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).
When was CVE-2026-13506 disclosed?
CVE-2026-13506 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-2026-13506 actively exploited?
CVE-2026-13506 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13506?
CVE-2026-13506 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-13506?
A fix for CVE-2026-13506 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-13506 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-13506

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