{"id":"CVE-2026-105863","state":"PUBLISHED","title":"Payload authentication token field handling issue","description":"Payload is a free and open source headless content management system. In versions after 3.0.0 and before 3.90.0, a custom field option that maps a field to a reserved authentication claim name can place unintended values in the authentication token issued at login. This issue is fixed in version 3.90.0.","publishedAt":"2026-10-06T16:39:44.912Z","updatedAt":"2026-10-09T01:15:33.512Z","severity":{"score":9.2,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["payloadcms payload"],"affected":[{"vendor":"payloadcms","product":"payload","versions":[{"version":">= 3.0.0, < 3.90.0","status":"affected"},{"version":">= 4.0.0-canary.0, < 4.0.0-canary.34","status":"affected"}]}],"references":["https://github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq","https://github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c","https://github.com/payloadcms/payload/releases/tag/v3.90.0"],"weaknesses":["CWE-290","CWE-915"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/105xxx/CVE-2026-105863.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105863","state":"PUBLISHED","datePublished":"2026-10-06T16:39:44.912Z","dateUpdated":"2026-10-09T01:15:33.512Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-05T23:06:29.748Z"},"containers":{"cna":{"title":"Payload authentication token field handling issue","descriptions":[{"lang":"en","value":"Payload is a free and open source headless content management system. In versions after 3.0.0 and before 3.90.0, a custom field option that maps a field to a reserved authentication claim name can place unintended values in the authentication token issued at login. This issue is fixed in version 3.90.0."}],"affected":[{"vendor":"payloadcms","product":"payload","versions":[{"version":">= 3.0.0, < 3.90.0","status":"affected"},{"version":">= 4.0.0-canary.0, < 4.0.0-canary.34","status":"affected"}]}],"references":[{"url":"https://github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq","name":"https://github.com/payloadcms/payload/security/advisories/GHSA-66wr-7vmr-p5jq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c","name":"https://github.com/payloadcms/payload/commit/56cd5cd050a57daebf33159e41e5ff9d4a45239c","tags":["x_refsource_MISC"]},{"url":"https://github.com/payloadcms/payload/releases/tag/v3.90.0","name":"https://github.com/payloadcms/payload/releases/tag/v3.90.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":9.2,"baseSeverity":"CRITICAL","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-290","lang":"en","description":"CWE-290: Authentication Bypass by Spoofing","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-915","lang":"en","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-06T16:39:44.912Z"},"source":{"advisory":"GHSA-66wr-7vmr-p5jq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-09T01:15:22.805238Z","id":"CVE-2026-105863","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-09T01:15:33.512Z"}}]}}}