CVE-2026-12860

MEDIUM 5.3CVE-2026-12860 · Published 03/08/2026 · updated 28/08/2026

In short

CVE-2026-12860 is a MEDIUM (CVSS 5.3) vulnerability affecting bc-java (bouncycastle), bouncy castle for java lts (bouncycastle).
Chance of exploitation in the next 30 days (EPSS): 0.17%, higher than 6.5% of all vulnerabilities.
Fix: update to 1.85 or later.

Package	Affected versions	Patched versions
bc-java bouncycastle	`< 1.85`	`1.85`
bouncy castle for java lts bouncycastle	`≤ 2.73.11`	No fix yet

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.

References

bcgit/bc-java commit ea5970e · Patch
bcgit/bc-java · Third Party Advisory

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Package

Affected versions

Patched versions

bc-java

bouncycastle

< 1.85

1.85

bouncy castle for java lts

bouncycastle

≤ 2.73.11

No fix yet

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