CVE-2026-59640

MediumCVSS 5.3/10Last modified Aug 28, 2026

Description

In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-203

Affected software

VendorProductVersions
Legion of the Bouncy Castle Inc.BC-JAVA< 1.85
Legion of the Bouncy Castle Inc.BC-LTS-JAVA>= 2.73.0, < 2.73.12
Legion of the Bouncy Castle Inc.BC-FJA>= 1.0.0, < 1.0.13; >= 2.0.0, < 2.0.13; >= 2.1.0, < 2.1.13

References

Timeline

Published
Aug 3, 2026
Last modified
Aug 28, 2026
NVD status
Analyzed

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CVE-2026-59640: Medium severity, CVSS 5.3 | Vulnix