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CVE-2026-59640

OpenPGP CFB quick-check oracle active on symmetric/session-key paths

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).

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Bouncycastle Legion Of The Bouncy Castle Inc.
Products
Bc-java Bcpg-fips Bouncy Castle For Java Lts and 3 more
CVE-2026-59639

CMS verifySignatures returns true for SignedData with zero signers

In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Bouncycastle Legion Of The Bouncy Castle Inc.
Products
Bc-java Bcpkix-fips Bouncy Castle For Java Lts and 3 more
CVE-2026-15055

PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input

In Bouncy Castle for Java before 1.85, PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12 (2.0.X series) and 2.1.12 (2.1.X series).

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Bouncycastle Legion Of The Bouncy Castle Inc.
Products
Bc-java Bcpkix-fips Bouncy Castle For Java Lts and 3 more
CVE-2026-8149

GCM chunking can lead to bad tag exception on decryption

A vulnerability in Legion of the Bouncy Castle Inc. BC-LTS bcprov-lts8on on X86_64, AVX, AVX-512f, Linux, Legion of the Bouncy Castle Inc. BC-FJA bc-fips on Linux, X86_64, AVX, AVX-512f. This vulnerability is associated with program files gcm128w, gcm512w, gcm128w.C, gcm512w.C. This issue affects BC-LTS: from 2.73.0 before 2.73.11; BC-FJA: from 2.1.0 before 2.1.3.

CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Vendors
Bouncycastle
Products
Bc-fja
CVE-2024-29857

org.bouncycastle: Importing an EC certificate with crafted F2m parameters may lead to Denial of Service

An issue was discovered in ECCurve.java and ECCurve.cs in Bouncy Castle Java (BC Java) before 1.78, BC Java LTS before 2.73.6, BC-FJA before 1.0.2.5, and BC C# .Net before 2.3.1. Importing an EC certificate with crafted F2m parameters can lead to excessive CPU consumption during the evaluation of the curve parameters.

CVSS 3.1 · 7.5 High EPSS 1.1% KEV · Not listed
Vendors
Bouncycastle Redhat
Products
Bc-fja Bc-java Bc C .net and 5 more