{"api_version":"1","generated_at":"2026-10-21T23:06:37+00:00","cve":"CVE-2026-82416","urls":{"html":"https://cve.report/CVE-2026-82416","api":"https://cve.report/api/cve/CVE-2026-82416.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-82416","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-82416"},"summary":{"title":"FrankenPHP: Cross-request PHP session ID leak in worker mode when the session extension is a shared module","description":"FrankenPHP is a modern application server for PHP. Prior to 1.12.5, FrankenPHP worker mode can retain PHP session state between requests when the session extension is loaded as a shared module and is unavailable through HAVE_PHP_SESSION at compile time. In this build configuration, frankenphp_reset_session_state() is compiled out, PS(id) can survive a request boundary, and a subsequent session_start() can ignore the new request's cookie because an identifier is already present. Under concurrent requests, session_id() can therefore return another client's identifier or a stale identifier from a previous request on the same worker thread, causing cross-user session exposure, possible session hijacking, and intermittent logout behavior. Builds with the session extension statically linked, including the official static binaries and Docker images, are not affected. This issue is fixed in version 1.12.5.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-10-13 17:17:47","updated_at":"2026-10-16 20:04:29"},"problem_types":["CWE-362","CWE-488","CWE-362 CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","CWE-488 CWE-488: Exposure of Data Element to Wrong Session"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","version":"3.1"}}],"references":[{"url":"https://github.com/php/frankenphp/pull/2523","name":"https://github.com/php/frankenphp/pull/2523","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/php/frankenphp/releases/tag/caddy/v1.12.5","name":"https://github.com/php/frankenphp/releases/tag/caddy/v1.12.5","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/php/frankenphp/commit/be24d82531675f90862b8cde1e9fc7e9ee855aa5","name":"https://github.com/php/frankenphp/commit/be24d82531675f90862b8cde1e9fc7e9ee855aa5","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/php/frankenphp/security/advisories/GHSA-v3ph-cgqh-r8p5","name":"https://github.com/php/frankenphp/security/advisories/GHSA-v3ph-cgqh-r8p5","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-82416","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82416","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"php","product":"frankenphp","version":"affected < 1.12.5","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"82416","cve":"CVE-2026-82416","epss":"0.002270000","percentile":"0.125650000","score_date":"2026-10-16","updated_at":"2026-10-17 00:14:15"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-82416","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-10-13T20:14:13.860672Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-10-13T20:22:02.706Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"product":"frankenphp","vendor":"php","versions":[{"status":"affected","version":"< 1.12.5"}]}],"descriptions":[{"lang":"en","value":"FrankenPHP is a modern application server for PHP. Prior to 1.12.5, FrankenPHP worker mode can retain PHP session state between requests when the session extension is loaded as a shared module and is unavailable through HAVE_PHP_SESSION at compile time. In this build configuration, frankenphp_reset_session_state() is compiled out, PS(id) can survive a request boundary, and a subsequent session_start() can ignore the new request's cookie because an identifier is already present. Under concurrent requests, session_id() can therefore return another client's identifier or a stale identifier from a previous request on the same worker thread, causing cross-user session exposure, possible session hijacking, and intermittent logout behavior. Builds with the session extension statically linked, including the official static binaries and Docker images, are not affected. This issue is fixed in version 1.12.5."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.7,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-362","description":"CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-488","description":"CWE-488: Exposure of Data Element to Wrong Session","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-10-13T16:20:53.439Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/php/frankenphp/security/advisories/GHSA-v3ph-cgqh-r8p5","tags":["x_refsource_CONFIRM"],"url":"https://github.com/php/frankenphp/security/advisories/GHSA-v3ph-cgqh-r8p5"},{"name":"https://github.com/php/frankenphp/pull/2523","tags":["x_refsource_MISC"],"url":"https://github.com/php/frankenphp/pull/2523"},{"name":"https://github.com/php/frankenphp/commit/be24d82531675f90862b8cde1e9fc7e9ee855aa5","tags":["x_refsource_MISC"],"url":"https://github.com/php/frankenphp/commit/be24d82531675f90862b8cde1e9fc7e9ee855aa5"},{"name":"https://github.com/php/frankenphp/releases/tag/caddy/v1.12.5","tags":["x_refsource_MISC"],"url":"https://github.com/php/frankenphp/releases/tag/caddy/v1.12.5"}],"source":{"advisory":"GHSA-v3ph-cgqh-r8p5","discovery":"UNKNOWN"},"title":"FrankenPHP: Cross-request PHP session ID leak in worker mode when the session extension is a shared module"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-82416","datePublished":"2026-10-13T16:20:53.439Z","dateReserved":"2026-08-28T22:00:43.514Z","dateUpdated":"2026-10-13T20:22:02.706Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-13 17:17:47","lastModifiedDate":"2026-10-16 20:04:29","problem_types":["CWE-362","CWE-488","CWE-362 CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')","CWE-488 CWE-488: Exposure of Data Element to Wrong Session"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","baseScore":7.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"LOW"},"exploitabilityScore":2.2,"impactScore":5.5}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-13T20:14:13.860672Z","id":"CVE-2026-82416","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"82416","Ordinal":"1","Title":"FrankenPHP: Cross-request PHP session ID leak in worker mode whe","CVE":"CVE-2026-82416","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"82416","Ordinal":"1","NoteData":"FrankenPHP is a modern application server for PHP. Prior to 1.12.5, FrankenPHP worker mode can retain PHP session state between requests when the session extension is loaded as a shared module and is unavailable through HAVE_PHP_SESSION at compile time. In this build configuration, frankenphp_reset_session_state() is compiled out, PS(id) can survive a request boundary, and a subsequent session_start() can ignore the new request's cookie because an identifier is already present. Under concurrent requests, session_id() can therefore return another client's identifier or a stale identifier from a previous request on the same worker thread, causing cross-user session exposure, possible session hijacking, and intermittent logout behavior. Builds with the session extension statically linked, including the official static binaries and Docker images, are not affected. This issue is fixed in version 1.12.5.","Type":"Description","Title":"FrankenPHP: Cross-request PHP session ID leak in worker mode whe"}]}}}