OpenPGP inline-signature policy failures silently ignored
Priority MEDIUM 43CWE-347Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-347.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00242 15th percentileScored 2026-11-07
Fix Partial BC-JAVA (Legion of the Bouncy Castle Inc.): 1.85BC-FJA (Legion of the Bouncy Castle Inc.): 2.0.13Red Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA | 1.81 to before 1.85 | 1.85 | Patch available | CNA |
| Legion of the Bouncy Castle Inc. | BC-FJA | 2.0.12 to before 2.0.13 | 2.0.13 | Patch available | CNA |
- BC-JAVA VendorLegion of the Bouncy Castle Inc. Affected 1.81 to before 1.85 Fixed in 1.85 Patch available CNA
- BC-FJA VendorLegion of the Bouncy Castle Inc. Affected 2.0.12 to before 2.0.13 Fixed in 2.0.13 Patch available CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:* | before 1.85 | Vulnerable | Legion of the Bouncy Castle Inc. |
| cpe:2.3:a:bouncycastle:bcpg-fips:*:*:*:*:*:*:*:* | before 2.0.13 | Vulnerable | Legion of the Bouncy Castle Inc. |
- cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:* Versions before 1.85 Vulnerable ·Legion of the Bouncy Castle Inc.
- cpe:2.3:a:bouncycastle:bcpg-fips:*:*:*:*:*:*:*:* Versions before 2.0.13 Vulnerable ·Legion of the Bouncy Castle Inc.
Remediation
- Fix · CNA BC-JAVA (Legion of the Bouncy Castle Inc.) Fixed in 1.85
- Fix · CNA BC-FJA (Legion of the Bouncy Castle Inc.) Fixed in 2.0.13
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Legion of the Bouncy Castle BC-JAVA 1.85
32 records Highest priority Priority MEDIUM 23 MEDIUM, 9 LOW
Other records, highest priority first
- TI-2026-42545 MTI/A0 DH agreement exponentiates unvalidated peer valuePriority MEDIUM 48
- TI-2026-42533 JSSE hostname verifier CN-fallback enabled by default despite documented opt-inPriority MEDIUM 48
- TI-2026-41816 Stapled OCSP response accepted without binding to the checked certificatePriority MEDIUM 48
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-59643
- 2026-10-03 Alias added: GHSA-r7xx-x336-xqqr
References
More Legion of the Bouncy Castle Inc. Bc-java vulnerabilities
- TI-2018-15967 Legion of the Bouncy Castle Legion of the Bouncy Castle Java Cryptography APIs 1.58 up to… CVSS 3.1CRITICAL 9.8
- TI-2017-09736 BouncyCastle JCE TLS Bleichenbacher/ROBOT CVSS 3.0HIGH 7.5
- TI-2026-42545 MTI/A0 DH agreement exponentiates unvalidated peer value CVSS 4.0CRITICAL 9.3
- TI-2026-42533 JSSE hostname verifier CN-fallback enabled by default despite documented opt-in CVSS 4.0CRITICAL 9.3
- TI-2026-41816 Stapled OCSP response accepted without binding to the checked certificate CVSS 4.0CRITICAL 9.3
- TI-2026-07701 Name Constraints bypass via trailing dot in rfc822Name and URI CVSS 4.0CRITICAL 9.3
Sources
- CVE-2026-59643 · CVE Program
- CVE-2026-59643 · NVD
- FIRST EPSS
- GHSA-r7xx-x336-xqqr · GitHub Advisory Database · CC BY 4.0
- CVE-2026-59643 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences