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…

PriorityP427medium5.3CVSS 3.1

AVNACLPRNUINSUCNILAN

EPSS

0.14%

3.9th percentile

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.

Affected

4 ranges

Vendor	Product	Version range	Fixed in
bouncycastle	bc-java	< 1.85	1.85
bouncycastle	bouncy_castle_for_java_lts	<= 2.73.11	—
legion_of_the_bouncy_castle_inc	bc-java	< 1.85	1.85
legion_of_the_bouncy_castle_inc	bc-lts-java	>= 2.73.0 < 2.73.12	2.73.12

CVSS provenance

nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber

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