{"id":"CVE-2026-33204","summary":"SimpleJWT has an Unauthenticated Denial of Service via JWE header tampering","details":"SimpleJWT is a simple JSON web token library written in PHP. Prior to version 1.1.1, an unauthenticated attacker can perform a Denial of Service via JWE header tampering when PBES2 algorithms are used. Applications that call JWE::decrypt() on attacker-controlled JWEs using PBES2 algorithms are affected. This issue has been patched in version 1.1.1.","aliases":["GHSA-xw36-67f8-339x"],"modified":"2026-08-12T03:51:49.411555111Z","published":"2026-03-20T22:37:13.411Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33204.json"},"references":[{"type":"WEB","url":"https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33204.json"},{"type":"ADVISORY","url":"https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33204"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/kelvinmo/simplejwt","events":[{"introduced":"0"},{"fixed":"c633d9d85837e60bdd4c65b4e3a3da12d22c0605"}],"database_specific":{"cpe":"cpe:2.3:a:kelvinmo:simplejwt:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.1.1"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["v1.1.0","v1.0.1","v1.0.0","v0.9.0","v0.8.0","v0.7.0","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.6.0-rc.2","v0.6.0-rc.1","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.1","v0.4.0","v0.3.1","v0.3.0","v0.2.5","v0.2.4","v0.2.3","v0.2.2","v0.1.6","v0.1.5","v0.1.4","v0.1.3","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33204.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:N/I:N/A:H"}]}