PT-2026-104567

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Description The Messaging Layer Security MLS, RFC 9420 implementation fails to bind an X.509 credential to a LeafNode signature key. The LeafNode.verify function validates a leaf signature against...

PT-2026-104566

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Description HQC leaks secret-derived data through two side channels during encapsulation and decapsulation. The GF2^8 arithmetic uses lookup tables indexed by field elements, causing the touched...

PT-2026-104569

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Description Validation of an MLS RFC 9420 external commit's proposal list in the validateExternalCachedProposals function of org.bouncycastle.mls.protocol.Group failed to verify that a removed leaf...

PT-2026-104570

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Description An issue exists in the BLS12 381BasicScheme.keyValidate function, affecting BLSPublicKeyParameters and the verify and aggregateVerify methods of BasicScheme, MessageAugmentation, and...

Linux Distros Unpatched Vulnerability : CVE-2026-18036

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, NTRU reduced secret values with the % operator in three helpers whose reference implementations are deliberately...

Linux Distros Unpatched Vulnerability : CVE-2026-18040

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, HQC leaked secret-derived data through two side channels: its GF2^8 arithmetic used lookup tables indexed by field...

Linux Distros Unpatched Vulnerability : CVE-2026-85515

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, a truncated OpenPGP encrypted message was accepted with no error reported, and on the SEIPD version 1 path with no...

PT-2026-104564

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Bouncy Castle for Java LTS versions prior to 2.73.13 Bouncy Castle for Java FIPS BC-FJA bcpg-fips versions prior to 1.0.14 Bouncy Castle for Java FIPS BC-FJA bcpg-fips versions prior to 2.0.14.1...

PT-2026-104561

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Bouncy Castle for Java LTS versions prior to 2.73.13 Bouncy Castle for Java FIPS BC-FJA bcpkix-fips versions prior to 1.0.13 Bouncy Castle for Java FIPS BC-FJA bcpkix-fips versions prior to 2.0.13...

PT-2026-104565

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Bouncy Castle for Java LTS versions prior to 2.73.13 Description Legacy PBES1 PKCS5 scheme 1 and PKCS12 PBE families in the raw JCA provider perform password-based key derivation using an iteration...

PT-2026-104568

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Description The high-level OpenPGP certificate API fails to verify if a component key of an issuing certificate has the required authority to certify when processing third-party certifications or...

PT-2026-104560

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Description The high-level OpenPGP API incorrectly accepts data signatures from a signing subkey when the Subkey Binding signature lacks an embedded Primary Key Binding cross-certification signatur...

Linux Distros Unpatched Vulnerability : CVE-2026-97873

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, the raw JCA provider's legacy PBES1 PKCS5 scheme 1 and PKCS12 PBE families ran their password-based key derivation with a...

PT-2026-104559

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java LTS versions prior to 2.73.13 Description One-shot native packet ciphers for AES-CBC, CCM, CFB, CTR, GCM, and GCM-SIV incorrectly use JNI's ReleaseByteArrayElements in mode 0 when releasing the caller's key, IV, and...

PT-2026-104563

Name of the Vulnerable Software and Affected Versions Bouncy Castle for Java versions prior to 1.86 Bouncy Castle for Java FIPS BC-FJA versions prior to bcpkix-fips 2.0.13 Bouncy Castle for Java FIPS BC-FJA versions prior to bcpkix-fips 2.1.13 Description Opt-in key-size validation for CMS...

Linux Distros Unpatched Vulnerability : CVE-2026-71890

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, validation of an MLS RFC 9420 external commit's proposal list,...

Linux Distros Unpatched Vulnerability : CVE-2026-71892

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, the opt-in key-size validation on CMS key-transport recipients,...

CVE-2026-71892: Incorrect Comparison

In Bouncy Castle for Java before 1.86, the opt-in key-size validation on CMS key-transport recipients, org.bouncycastle.cms.jcajce.JceKeyTransRecipient.setKeySizeValidationtrue, never ran for a message using RFC 9709 content-encryption key derivation id-alg-cek-hkdf-sha256. The branch that should...

Linux Distros Unpatched Vulnerability : CVE-2026-71891

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, BLS12381BasicScheme.keyValidate, and so BLSPublicKeyParameters and every BasicScheme, MessageAugmentation and...

CVE-2026-71887: Improper Verification of Cryptographic Signature

In Bouncy Castle for Java before 1.86, the high-level OpenPGP API accepted a data signature made by a signing subkey whose Subkey Binding signature carried no embedded Primary Key Binding cross-certification signature, in the case where that binding omits a Key Flags subpacket. RFC 9580 sec...