{"id":"DEBIAN-CVE-2026-102946","details":"joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.7.4, joserfc.jws.deserialize_json() accepts a JWS General JSON Serialization with an empty signatures array as authenticated. The verify_general_json() loop performs no iterations for the empty array and returns success because no signature check failed, allowing an attacker without a signing key to supply an arbitrary payload that relying applications may treat as authentic. The issue affects the General JSON Serialization path; compact JWS and JWT decoding, Flattened JSON serialization, and JWE JSON processing do not follow this vulnerable path. This issue is fixed in version 1.7.4.","modified":"2026-10-17T15:00:08.124237049Z","published":"2026-10-15T19:17:13.423Z","upstream":["CVE-2026-102946"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-102946"}],"affected":[{"package":{"name":"joserfc","ecosystem":"Debian:13","purl":"pkg:deb/debian/joserfc?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-1","1.2.0-1","1.2.2-1","1.3.1-1","1.3.2-1","1.3.4-1","1.4.0-1","1.4.1-1","1.4.3-1","1.5.0-1","1.6.0-1","1.6.1-1","1.6.2-1","1.6.3-1","1.6.4-1","1.6.5-1","1.6.8-1","1.7.0-1","1.7.1-1","1.7.2-1","1.7.3-1","1.7.4-1","1.7.5-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102946.json"}},{"package":{"name":"joserfc","ecosystem":"Debian:14","purl":"pkg:deb/debian/joserfc?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.4-1"}]}],"versions":["1.1.0-1","1.2.0-1","1.2.2-1","1.3.1-1","1.3.2-1","1.3.4-1","1.4.0-1","1.4.1-1","1.4.3-1","1.5.0-1","1.6.0-1","1.6.1-1","1.6.2-1","1.6.3-1","1.6.4-1","1.6.5-1","1.6.8-1","1.7.0-1","1.7.1-1","1.7.2-1","1.7.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-102946.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}