CVE-2026-12860

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/bcgit/bc-java/commit/ea5970ea9b2fb91d763b904692fd21089ca3e396	Patch
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012860	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:bouncycastle:bc-java::::::::
	cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts::::::::

History

No history.

Information

Published : 2026-08-03 04:16

Updated : 2026-08-28 16:35

NVD link : CVE-2026-12860

Mitre link : CVE-2026-12860

CVE.ORG link : CVE-2026-12860

JSON object : View

Products Affected

bouncycastle

bouncy_castle_for_java_lts
bc-java

CWE

CWE-347

Improper Verification of Cryptographic Signature

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