Fluid Attacks Database

Description

In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. 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
rpm rhel9	jmc	-	-
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-2026-128162. NVD-2026-128163. OSV-2026-128164. OSV-DEBIAN-2026-128165. GCVE-2026-128166. https://github.com/bcgit/bc-java/wiki/CVE-2026-128167. SECURITY-TRACKER-CVE-2026-12816

References

1. https://github.com/bcgit/bc-java/commit/6d9e4bbaee9409713ada167e5f901554cbb084ac

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