CVE-2026-59641CWE-345

CVE-2026-59641

Medium · published August 3, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
7.1
In the wild
Unconfirmed
What it is

In Bouncy Castle for Java before 1.85, S/MIME validator trusts signer-asserted signingTime for path validation. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcmail-fips and bcjmail-fips 1.0.7 (1.0.X series), 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).

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
0.00179 · 7.1th percentile
Weakness
CWE-345 · Insufficient Verification of Data Authenticity
Published
2026-08-03T05:16Z
Affected products (8)
ProductVersionsFixed in
bouncycastle/bc-java< 1.851.85
bouncycastle/bcjmail-fips< 1.0.71.0.7
bouncycastle/bcjmail-fips≥ 2.0.5, < 2.0.72.0.7
bouncycastle/bcjmail-fips≥ 2.1.6, < 2.1.72.1.7
bouncycastle/bcmail-fips< 1.0.71.0.7
bouncycastle/bcmail-fips≥ 2.0.5, < 2.0.72.0.7
bouncycastle/bcmail-fips≥ 2.1.6, < 2.1.72.1.7
bouncycastle/bouncy_castle_for_java_lts≤ 2.73.11—
References (3)
https://github.com/bcgit/bc-java/commit/2f81b22d559b3a1b026388e1ca78dd547384def8 · 91579145-5d7b-4cc5-b925-a0262ff19630https://github.com/bcgit/bc-java/commit/fd89fe918b37fea1c71e95fae50284a325b09721 · 91579145-5d7b-4cc5-b925-a0262ff19630https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059641 · 91579145-5d7b-4cc5-b925-a0262ff19630
EPSS history
Timeline
  • 03 AUG 00:54Z
    S/MIME validator trusts signer-asserted signingTime for path validation
    cvelistv5