{"schema_version":"1.7.2","id":"OESA-2026-3457","modified":"2026-08-20T10:00:02Z","published":"2026-08-20T10:00:02Z","upstream":["CVE-2026-69249"],"summary":"python-cryptography security update","details":"cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.\r\n\r\nSecurity Fix(es):\n\npython-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to 49.0.0, when resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents unbounded recursion and guarantees termination, an attacker-controlled certificate chain can lead the processing to easily take more than 5s to reject in testing. This amplification could form the basis for a resource exhaustion denial of service attack. The core issue arises in the recursive nature of build_chain_inner, which does not de-duplicate against previously analyzed candidates. As the correctness of validation is not affected, the integrity of a system cannot be compromised through this vector, only its availability. This issue is fixed in 49.0.0.(CVE-2026-69249)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"python-cryptography","purl":"pkg:rpm/openEuler/python-cryptography&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"42.0.2-10.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["python-cryptography-debuginfo-42.0.2-10.oe2403sp3.aarch64.rpm","python-cryptography-debugsource-42.0.2-10.oe2403sp3.aarch64.rpm","python3-cryptography-42.0.2-10.oe2403sp3.aarch64.rpm"],"noarch":["python-cryptography-help-42.0.2-10.oe2403sp3.noarch.rpm"],"src":["python-cryptography-42.0.2-10.oe2403sp3.src.rpm"],"x86_64":["python-cryptography-debuginfo-42.0.2-10.oe2403sp3.x86_64.rpm","python-cryptography-debugsource-42.0.2-10.oe2403sp3.x86_64.rpm","python3-cryptography-42.0.2-10.oe2403sp3.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3457"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-69249"}],"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}],"database_specific":{"severity":"High"}}