CVE-2026-59643

OpenPGP inline-signature policy failures silently ignored

HIGH

7.5

CVSS Score

Published: August 3, 2026 at 12:51 AM UTC

Updated: September 10, 2026 at 07:18 PM UTC

4 products affected across 2 vendorsBc JavaBcpg FipsBC Java

Using BC-JAVA by Legion of the Bouncy Castle Inc.?

Get instant alerts when new vulnerabilities affect BC-JAVA - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

HIGH7.5

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

In Bouncy Castle for Java before 1.85, OpenPGP inline-signature policy failures silently ignored. This issue also affects Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 2.0.13.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Bc Java · Bouncycastle

95%

v < 1.85

Affected range stops below 1.85, so it looks safe — our inference, not a vendor statement

Bcpg Fips · Bouncycastle

95%

v < 2.0.13

Affected range stops below 2.0.13, so it looks safe — our inference, not a vendor statement

Bouncy Castle for Java FIPS (BC-FJA)· Legion of Bouncy Castlemaven

60%

2.0.12 ≤ v < 2.0.132.0.12

Affected range stops below 2.0.13, so it looks safe — our inference, not a vendor statement

BC Java · Legion of Bouncy Castlemaven

60%

1.81 ≤ v < 1.851.81

Affected range stops below 1.85, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Source: cverecord

https://github.com/bcgit/bc-java/wiki/CVE-2026-59643

Patch

Source: cverecord

https://github.com/bcgit/bc-java/commit/d3f8cc408b4a36d28e5a410c93436fe3d0fe726b

Vendor AdvisoryThird Party Advisory

Source: cverecord

https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059643

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-347

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card