{"api_version":"1","generated_at":"2026-04-23T11:24:36+00:00","cve":"CVE-2026-33204","urls":{"html":"https://cve.report/CVE-2026-33204","api":"https://cve.report/api/cve/CVE-2026-33204.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-33204","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-33204"},"summary":{"title":"SimpleJWT has an Unauthenticated Denial of Service via JWE header tampering","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-03-20 23:16:45","updated_at":"2026-04-10 01:25:08"},"problem_types":["CWE-400","CWE-400 CWE-400: Uncontrolled Resource Consumption"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1","name":"https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1","refsource":"security-advisories@github.com","tags":["Product","Release Notes"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x","name":"https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x","refsource":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33204","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33204","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"kelvinmo","product":"simplejwt","version":"affected < 1.1.1","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"33204","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"kelvinmo","cpe5":"simplejwt","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"33204","cve":"CVE-2026-33204","epss":"0.001150000","percentile":"0.301410000","score_date":"2026-04-15","updated_at":"2026-04-16 00:13:57"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-33204","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-03-24T15:33:43.475530Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-03-24T15:34:35.165Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"simplejwt","vendor":"kelvinmo","versions":[{"status":"affected","version":"< 1.1.1"}]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-03-20T22:37:13.411Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x","tags":["x_refsource_CONFIRM"],"url":"https://github.com/kelvinmo/simplejwt/security/advisories/GHSA-xw36-67f8-339x"},{"name":"https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1","tags":["x_refsource_MISC"],"url":"https://github.com/kelvinmo/simplejwt/releases/tag/v1.1.1"}],"source":{"advisory":"GHSA-xw36-67f8-339x","discovery":"UNKNOWN"},"title":"SimpleJWT has an Unauthenticated Denial of Service via JWE header tampering"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-33204","datePublished":"2026-03-20T22:37:13.411Z","dateReserved":"2026-03-17T23:23:58.312Z","dateUpdated":"2026-03-24T15:34:35.165Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-20 23:16:45","lastModifiedDate":"2026-04-10 01:25:08","problem_types":["CWE-400","CWE-400 CWE-400: Uncontrolled Resource Consumption"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:kelvinmo:simplejwt:*:*:*:*:*:*:*:*","versionEndExcluding":"1.1.1","matchCriteriaId":"FF560E9F-8D50-4B6F-84FF-B63FAB5BD2D0"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"33204","Ordinal":"1","Title":"SimpleJWT has an Unauthenticated Denial of Service via JWE heade","CVE":"CVE-2026-33204","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"33204","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"SimpleJWT has an Unauthenticated Denial of Service via JWE heade"}]}}}