CVE-2026-59641
Medium
Description
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).
SeverityMedium
CVSS5.3
Exploit probability—
ProductBouncycastle Bcjmail-fips
PublishedAug 3, 2026
First seenAug 3, 2026
Weakness typeCWE-345CWE-345
How to fix
Update
- bouncycastle bcjmail-fips1.0.7, 2.0.7, 2.1.7 or later
- bouncycastle bc-java1.85 or later
- bouncycastle bcmail-fips1.0.7, 2.0.7, 2.1.7 or later
Patches
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bouncycastle bcjmail-fips | v < 1.0.7, 2.0.5 ≤ v < 2.0.7, 2.1.6 ≤ v < 2.1.7 | 1.0.7, 2.0.7, 2.1.7 |
| bouncycastle bc-java | v < 1.85 | 1.85 |
| bouncycastle bcmail-fips | v < 1.0.7, 2.0.5 ≤ v < 2.0.7, 2.1.6 ≤ v < 2.1.7 | 1.0.7, 2.0.7, 2.1.7 |
| bouncycastle bouncy_castle_for_java_lts | v ≤ 2.73.11 | — |
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