CVE-2026-59651

BKS keystore accepts legacy version with 16-bit integrity MAC key

State: Published
Severity: 7.1 High
Published: Aug 3, 2026
Updated: Aug 3, 2026
Reserved: Jul 6, 2026

Description

In Bouncy Castle for Java before 1.85, BKS keystore accepts legacy version with 16-bit integrity MAC key. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber	bcorg

Weaknesses

CWE-326 Inadequate Encryption Strength

Affected Products

Product	Versions
BC-JAVALegion of the Bouncy Castle Inc.	before 1.85Affected
BC-LTS-JAVALegion of the Bouncy Castle Inc.	2.73.0 to before 2.73.12Affected

References

https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059651vendor-advisory
https://github.com/bcgit/bc-java/commit/faf5daa6e9b8460f862afc0af1cc0da365f7d4d2patch

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