Security update for python-cryptography SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2026:20706-1 Final 1 1 2026-03-05T13:08:52Z current 2026-03-05T13:08:52Z 2026-03-05T13:08:52Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for python-cryptography This update for python-cryptography fixes the following issues: - CVE-2026-26007: missing validation can lead to security issues for signature verification (ECDSA) and shared key negotiation (ECDH) (bsc#1258074). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-SLE-Micro-6.0-607 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2026/suse-su-202620706-1/ Link for SUSE-SU-2026:20706-1 https://lists.suse.com/pipermail/sle-security-updates/2026-March/024719.html E-Mail link for SUSE-SU-2026:20706-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1258074 SUSE Bug 1258074 https://www.suse.com/security/cve/CVE-2026-26007/ SUSE CVE CVE-2026-26007 page SUSE Linux Micro 6.0 python311-cryptography-42.0.4-3.1 python311-cryptography-42.0.4-3.1 as a component of SUSE Linux Micro 6.0 cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to 46.0.5, the public_key_from_numbers (or EllipticCurvePublicNumbers.public_key()), EllipticCurvePublicNumbers.public_key(), load_der_public_key() and load_pem_public_key() functions do not verify that the point belongs to the expected prime-order subgroup of the curve. This missing validation allows an attacker to provide a public key point P from a small-order subgroup. This can lead to security issues in various situations, such as the most commonly used signature verification (ECDSA) and shared key negotiation (ECDH). When the victim computes the shared secret as S = [victim_private_key]P via ECDH, this leaks information about victim_private_key mod (small_subgroup_order). For curves with cofactor > 1, this reveals the least significant bits of the private key. When these weak public keys are used in ECDSA , it's easy to forge signatures on the small subgroup. Only SECT curves are impacted by this. This vulnerability is fixed in 46.0.5. CVE-2026-26007 SUSE Linux Micro 6.0:python311-cryptography-42.0.4-3.1 moderate To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2026/suse-su-202620706-1/ https://www.suse.com/security/cve/CVE-2026-26007.html CVE-2026-26007 https://bugzilla.suse.com/1258074 SUSE Bug 1258074