{"schema_version":"1.7.2","id":"OESA-2026-3636","modified":"2026-09-05T15:03:22Z","published":"2026-09-05T15:03:22Z","upstream":["CVE-2026-39373"],"summary":"python-jwcrypto security update","details":"Implements JWK, JWS, JWE specifications with python-cryptography\r\n\r\nSecurity Fix(es):\n\nJWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing patch for CVE-2024-28102  limits input token size to 250KB but does not validate the decompressed output size. An unauthenticated attacker can cause memory exhaustion on memory-constrained systems. A token under the 250KB input limit can decompress to approximately 100MB. This vulnerability is fixed in 1.5.7.(CVE-2026-39373)","affected":[{"package":{"ecosystem":"openEuler:22.03-LTS-SP4","name":"python-jwcrypto","purl":"pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-22.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.2-4.oe2203sp4"}]}],"ecosystem_specific":{"noarch":["python3-jwcrypto-1.4.2-4.oe2203sp4.noarch.rpm"],"src":["python-jwcrypto-1.4.2-4.oe2203sp4.src.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3636"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39373"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}],"database_specific":{"severity":"Medium"}}