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CVE-2026-12802

CMS AuthEnvelopedData fails to enforce tag-length on decryption

In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption. 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-2026-59647

CRMF/CMP password-MAC honours unbounded iteration count

In Bouncy Castle for Java before 1.85, CRMF/CMP password-MAC honours unbounded iteration count. 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 · 6.9 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-2026-59642

CMS AuthenticatedData content not bound to MAC when authAttrs present

In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. 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-2026-59639

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