CVE-2026-12860 HIGH

CVE-2026-12860: RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path

Vendor Legion Of The Bouncy Castle Inc.
Product BC-JAVA
Weakness CWE-347
Published August 3, 2026
Last update August 3, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 3, 2026 CVE published
August 3, 2026 Record updated

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