{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"Medium" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"python-jwcrypto security update", "category":"general", "title":"Synopsis" }, { "text":"An update for python-jwcrypto is now available for openEuler-24.03-LTS-SP2", "category":"general", "title":"Summary" }, { "text":"Implements JWK, JWS, JWE specifications with python-cryptography\n\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)", "category":"general", "title":"Description" }, { "text":"An update for python-jwcrypto is now available for master/openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP4/openEuler-24.03-LTS/openEuler-24.03-LTS-Next/openEuler-24.03-LTS-SP1/openEuler-24.03-LTS-SP2/openEuler-24.03-LTS-SP3.\n\nopenEuler Security has rated this update as having a security impact of medium. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.", "category":"general", "title":"Topic" }, { "text":"Medium", "category":"general", "title":"Severity" }, { "text":"python-jwcrypto", "category":"general", "title":"Affected Component" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"openEuler-SA-2026-1923", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1923" }, { "summary":"CVE-2026-39373", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-39373&packageName=python-jwcrypto" }, { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39373" }, { "summary":"openEuler-SA-2026-1923 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/advisories/2026/csaf-openeuler-sa-2026-1923.json" } ], "title":"An update for python-jwcrypto is now available for openEuler-24.03-LTS-SP2", "tracking":{ "initial_release_date":"2026-04-17T21:04:22+08:00", "revision_history":[ { "date":"2026-04-17T21:04:22+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-04-17T21:04:22+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-04-17T21:04:22+08:00", "id":"openEuler-SA-2026-1923", "version":"1.0.0", "status":"final" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"openEuler-24.03-LTS-SP2", "name":"openEuler-24.03-LTS-SP2" }, "name":"openEuler-24.03-LTS-SP2", "category":"product_version" } ], "category":"product_name" }, { "name":"src", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"python-jwcrypto-1.5.0-4.oe2403sp2.src.rpm", "name":"python-jwcrypto-1.5.0-4.oe2403sp2.src.rpm" }, "name":"python-jwcrypto-1.5.0-4.oe2403sp2.src.rpm", "category":"product_version" } ], "category":"architecture" }, { "name":"noarch", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch.rpm", "name":"python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch.rpm" }, "name":"python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP2" }, "product_id":"python3-jwcrypto-1.5.0-4.oe2403sp2.noarch.rpm", "name":"python3-jwcrypto-1.5.0-4.oe2403sp2.noarch.rpm" }, "name":"python3-jwcrypto-1.5.0-4.oe2403sp2.noarch.rpm", "category":"product_version" } ], "category":"architecture" } ] } ], "relationships":[ { "relates_to_product_reference":"openEuler-24.03-LTS-SP2", "product_reference":"python-jwcrypto-1.5.0-4.oe2403sp2.src.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP2:python-jwcrypto-1.5.0-4.oe2403sp2.src", "name":"python-jwcrypto-1.5.0-4.oe2403sp2.src as a component of openEuler-24.03-LTS-SP2" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP2", "product_reference":"python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP2:python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch", "name":"python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch as a component of openEuler-24.03-LTS-SP2" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP2", "product_reference":"python3-jwcrypto-1.5.0-4.oe2403sp2.noarch.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP2:python3-jwcrypto-1.5.0-4.oe2403sp2.noarch", "name":"python3-jwcrypto-1.5.0-4.oe2403sp2.noarch as a component of openEuler-24.03-LTS-SP2" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-39373", "notes":[ { "text":"JWCrypto 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.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP2:python-jwcrypto-1.5.0-4.oe2403sp2.src", "openEuler-24.03-LTS-SP2:python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch", "openEuler-24.03-LTS-SP2:python3-jwcrypto-1.5.0-4.oe2403sp2.noarch" ] }, "remediations":[ { "product_ids":{"$ref":"$.vulnerabilities[0].product_status.fixed"}, "details":"python-jwcrypto security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1923" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"MEDIUM", "baseScore":5.3, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version":"3.1" }, "products":{"$ref":"$.vulnerabilities[0].product_status.fixed"} } ], "threats":[ { "details":"Medium", "category":"impact" } ], "title":"CVE-2026-39373" } ] }