CVE-2026-63573

Observable discrepancy in the CMS RSA PKCS1 v1.5 key-transport unwrap KeyTransRecipientInformation.UnwrapKey in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who holds a captured CMS EnvelopedData message, and who can submit many modified messages to an...

CVE-2026-63573

A Bleichenbacher-style adaptive chosen-ciphertext attack exists in Legion of the Bouncy Castle Inc. bc-csharp versions before 2.7.0 . The vulnerability is located in the CMS RSA PKCS#1 v1.5 key-transport unwrap (KeyTransRecipientInformation.UnwrapKey) component. Because the system rejects ciphert...

EUVD-2026-91224

Observable discrepancy in the CMS RSA PKCS1 v1.5 key-transport unwrap KeyTransRecipientInformation.UnwrapKey in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who holds a captured CMS EnvelopedData message, and who can submit many modified messages to an...

CVE-2026-63573 Bleichenbacher padding oracle in CMS RSA PKCS#1 v1.5 key-transport unwrap

Observable discrepancy in the CMS RSA PKCS1 v1.5 key-transport unwrap KeyTransRecipientInformation.UnwrapKey in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who holds a captured CMS EnvelopedData message, and who can submit many modified messages to an...

PT-2026-104132

Observable discrepancy in the CMS RSA PKCS1 v1.5 key-transport unwrap KeyTransRecipientInformation.UnwrapKey in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who holds a captured CMS EnvelopedData message, and who can submit many modified messages to an...

Rocky Linux 9 [CIQ] Security Update: opensc / opensc-debuginfo / opensc-debugsource (crlsa-2024_0966)

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20240966 advisory. OpenSC: Side-channel leaks while stripping encryption PKCS1 padding CVE-2023-5992 Tenable has extracted the preceding description block directly from the CIQ securi...

Rocky Linux 8 [CIQ] Security Update: opensc / opensc-debuginfo / opensc-debugsource (crlsa-2024_0967)

The Rocky Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-20240967 advisory. OpenSC: Side-channel leaks while stripping encryption PKCS1 padding CVE-2023-5992 Tenable has extracted the preceding description block directly from the CIQ securi...

AlmaLinux 9.2 [TuxCare] Security Update: opencryptoki / opencryptoki-devel / opencryptoki-icsftok / etc (ALMALINUX9.2:CLSA-2026:1784542737)

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1784542737 advisory. - A timing side-channel vulnerability has been discovered in the opencryptoki package while processing RSA PKCS1 v1.5 padded ciphertexts. Thi...

librenswan: IKEv1 Denial of Service via RSA-SHA1 (PKCS#1 Version 1.5 Encrypted) authentication payload

A flaw was found in Libreswan's implementation of IKEv1 authentication via raw RSA signatures. When processing an IKEv1 packet using PKCS 1 v1.5 RSA encryption, the RSAauthenticatehashsignaturerawrsa function fails to properly validate the length of the authentication hash. A remote,...

org.bouncycastle/bc-java: org.bouncycastle/bc-lts-java: Bouncy Castle for Java: Cryptographic signature bypass in RSA PKCS#1 verification

A flaw was found in Bouncy Castle for Java. During the RSA PKCS1 verification process, the last two hash bytes are incorrectly skipped when a NULL-omitted path is utilized. This vulnerability could allow an attacker to bypass cryptographic signature verification, potentially leading to the...

Security Bulletin: QRadar App SDK for IBM QRadar SIEM contains components with known vulnerabilities

Summary The product includes vulnerable components e.g., framework libraries that could be identified and exploited with automated tools. Investigation Assistant App for IBM QRadar App SDK has addressed the applicable CVEs in an update. Vulnerability Details CVEID:CVE-2026-69247 DESCRIPTION:...

Security Bulletin: IBM Watson Discovery for IBM Cloud Pak for Data affected by vulnerability in cryptography

Summary IBM Watson Discovery for IBM Cloud Pak for Data affected by vulnerability in cryptography Vulnerability Details CVEID:CVE-2026-69247 DESCRIPTION: cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 44.0.0 until 50.0.0,...

CVE-2026-12860

A flaw was found in Bouncy Castle for Java. During the RSA PKCS1 verification process, the last two hash bytes are incorrectly skipped when a NULL-omitted path is utilized. This vulnerability could allow an attacker to bypass cryptographic signature verification, potentially leading to the...

EUVD-2026-75708

In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS 1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key...

CVE-2026-89086

CVE-2026-89086 affects the jose package for OCaml, versions before 0.11.0. The vulnerability lies in RSA signature validation: library calls only confirm that PKCS #1 decoding succeeds and then declare the signature valid, skipping the required steps that involve the public key . This means a mal...

CVE-2026-89086

In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS 1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key...

CVE-2026-89086

In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS 1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key...

CVE-2026-89086

In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS 1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key...

PT-2026-89582

Name of the Vulnerable Software and Affected Versions jose versions prior to 0.11.0 Description The jose package for OCaml fails to properly validate RSA signatures. The library only confirms that PKCS 1 decoding succeeds but does not perform the necessary verification steps using the public key,...

MikroTik RouterOS 7.0.x < 7.23.4 / 7.24.x < 7.24.2 X.509 Signature Validation Bypass (CVE-2026-67278)

According to its self-reported version, the remote networking device is running a version of MikroTik RouterOS 7.0.x prior to 7.23.4, or 7.24.x prior to 7.24.2. It is, therefore, affected by a certificate validation vulnerability. MikroTik RouterOS accepts malformed RSA/PKCS1 v1.5 signatures duri...