CVE-2026-71886

A flaw was found in Bouncy Castle. The OpenPGP certificate application programming interface API fails to verify whether a subkey possesses certification authority before validating third-party certifications or trust delegations. An attacker in possession of a restricted signing or encryption...

Astra Linux – Vulnerability in Thunderbird

An attacker may carry out a DoS attack to prevent a user from sending encrypted emails to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self-signature, and the Thunderbird user imports the crafted key, then Thunderbird may attempt to use the inval...

DEBIAN-CVE-2026-71887

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...

CVE-2026-71887

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...

UBUNTU-CVE-2026-71887

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...

CVE-2026-71886 OpenPGP certification accepted from a subkey without certification authority

In Bouncy Castle for Java before 1.86, the high-level OpenPGP certificate API accepted a third-party certification or trust delegation from any component key of the issuing certificate, without requiring that component to have been granted the authority to certify...

CVE-2026-71886 OpenPGP certification accepted from a subkey without certification authority

In Bouncy Castle for Java before 1.86, the high-level OpenPGP certificate API accepted a third-party certification or trust delegation from any component key of the issuing certificate, without requiring that component to have been granted the authority to certify...

CVE-2026-71886 OpenPGP certification accepted from a subkey without certification authority

In Bouncy Castle for Java before 1.86, the high-level OpenPGP certificate API accepted a third-party certification or trust delegation from any component key of the issuing certificate, without requiring that component to have been granted the authority to certify...

CVE-2026-71887 OpenPGP data signature accepted from a signing subkey without cross-certification

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...

CVE-2026-71887

The Bouncy Castle for Java high-level OpenPGP API (versions before 1.86 ) contains a vulnerability where it accepts data signatures from signing subkeys that lack a required embedded Primary Key Binding signature when the Key Flags subpacket is omitted. The flaw stems from inconsistent logic in O...

CVE-2026-71887 OpenPGP data signature accepted from a signing subkey without cross-certification

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...

EUVD-2026-91993

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...

CVE-2026-71887 OpenPGP data signature accepted from a signing subkey without cross-certification

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...

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...

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...

AlmaLinux 9.2 [TuxCare] Security Update: gnupg2 / gnupg2-smime (ALMALINUX9.2:CLSA-2026:1774612633)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1774612633 advisory. - In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has...

AlmaLinux 9.6 [TuxCare] Security Update: gnupg2 / gnupg2-smime (ALMALINUX9.6:CLSA-2026:1775119189)

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1775119189 advisory. - In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has...

Rocky Linux 9.6 [TuxCare] Security Update: gnupg2 / gnupg2-smime (ALMALINUX9.6:CLSA-2026:1775119189)

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1775119189 advisory. - In GnuPG before 2.5.5, if a user chooses to import a certificate with certain crafted subkey data that lacks a valid backsig or that has...

AlmaLinux 9.2 [TuxCare] Security Update: munge / munge-devel / munge-libs (ALMALINUX9.2:CLSA-2026:1772571803)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1772571803 advisory. - MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer...

Astra Linux – Vulnerability in Thunderbird

If a Thunderbird user has previously imported Alice’s OpenPGP key, and Alice has extended the validity period of her key, but Alice’s updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice’s key with an invalid subkey. In this case, Thunderbird...