CVE-2026-12860CWE-347

CVE-2026-12860

Medium · published August 3, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
6.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00171 · 6.2th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
Published
2026-08-03T08:16Z
Affected products (2)
ProductVersionsFixed in
bouncycastle/bc-java< 1.851.85
bouncycastle/bouncy_castle_for_java_lts≤ 2.73.11—
References (2)
https://github.com/bcgit/bc-java/commit/ea5970ea9b2fb91d763b904692fd21089ca3e396 · 91579145-5d7b-4cc5-b925-a0262ff19630https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9012860 · 91579145-5d7b-4cc5-b925-a0262ff19630
EPSS history
Timeline
  • 03 AUG 02:55Z
    RSA PKCS#1 verification skips last two hash bytes in NULL-omitted path
    cvelistv5