CVE-2026-12185

High

Description

In Bouncy Castle for Java before 1.85, BKS/UBER keystore allocates from untrusted lengths before integrity check. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

SeverityHigh

CVSS8.6

Exploit probability—

ProductBouncycastle Bouncy Castle For Java Lts

PublishedAug 3, 2026

First seenAug 3, 2026

Weakness typeCWE-789CWE-789

How to fix

Update

bouncycastle bc-java1.85 or later

Patches

github.com/bcgit/bc-java/commit/7bbd7fe5f44132e5b6140a2914435c12430eeb3d

Vendor advisories

github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012185

Affected products

Product	Affected versions	Fixed in
bouncycastle bouncy_castle_for_java_lts	v ≤ 2.73.11	—
bouncycastle bc-java	v < 1.85	1.85

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