Fluid Attacks Database

Description

In Bouncy Castle for Java before 1.85, RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
maven	org.bouncycastle:bcprov-jdk14	>=0 <1.85.0	1.85.0
maven	org.bouncycastle:bcprov-jdk15to18	>=0 <1.85.0	1.85.0
maven	org.bouncycastle:bcprov-jdk18on	>=0 <1.85.0	1.85.0
maven	org.bouncycastle:bcprov-lts8on	>=2.73.0 <2.73.12	2.73.12
debian 12	bouncycastle	=1.72-2 \|\| =1.77-1 \|\| =1.80-1 \|\| =1.80-2 \|\| =1.80-3 \|\| =1.86-1	-
debian 13	bouncycastle	=1.80-3 \|\| =1.86-1	-
debian 14	bouncycastle	=1.80-3 \|\| >=0 <1.86-1	1.86-1

Aliases

1. CVE-2026-128602. NVD-2026-128603. OSV-2026-128604. OSV-DEBIAN-2026-128605. GCVE-2026-128606. https://github.com/bcgit/bc-java/wiki/CVE-2026-128607. SECURITY-TRACKER-CVE-2026-12860

References

1. https://github.com/bcgit/bc-java/commit/ea5970ea9b2fb91d763b904692fd21089ca3e396

Does your application use this vulnerable software?

During the free trial, our tools assess your application, identify vulnerabilities, and provide recommendations for their remediation.