CVE-2026-58060: Bouncycastle Bc-Java

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

In Bouncy Castle for Java before 1.85, HSS public-key level count unbounded, enabling huge allocation on verify. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

Affected products

• Bouncycastle Bc-Java: from 1.65, before 1.85 (fixed in 1.85)
• Bouncycastle Bouncy Castle For Java LTS: up to and including 2.73.11
• Bouncycastle Fips Java API: before 2.0.2 (fixed in 2.0.2); from 2.1.0, before 2.1.3 (fixed in 2.1.3)

Published 2026-08-03. Last modified 2026-09-02.