PT-2026-67019 · Legion Of The Bouncy Castle · Bc-Java

CVE-2026-12852 · Published 2026-08-03 · Updated 2026-08-03

Mitre

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber

In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bounds check.

Exploit

Fix

Weakness Enumeration

CWE-789

Related Identifiers

CVE-2026-12852

Affected Products

Bc-Java

References · 3

• 🔥 https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012852 · Exploit
• https://github.com/bcgit/bc-java/commit/a747038bb5bbd5e29fb2b7607ab38af1fd8d1790 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-12852 · Security Note