{"id":"CVE-2026-82531","summary":"Smarty before 4.5.8 and 5.x before 5.8.5 PHP Code Injection via extends: Inheritance Cache","details":"Smarty before 4.5.8 and 5.x before 5.8.5 contains a code injection vulnerability where the top-level nocache_hash is never restored during extends:/multi-component template inheritance, leaving it null. Attackers can supply assigned data containing a forged SmartyNocache marker that is copied verbatim into the regenerated PHP cache file, executing arbitrary PHP on include for remote code execution.","aliases":["GHSA-3w63-v7pm-cq9x"],"modified":"2026-10-08T02:52:06.772823200Z","published":"2026-10-06T12:18:31.801Z","database_specific":{"cwe_ids":["CWE-94"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82531.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"4.5.8"},{"introduced":"5.0.0"},{"fixed":"5.8.5"}]},{"extracted_events":[{"fixed":"4.5.8"},{"introduced":"5.0.0"},{"fixed":"5.8.5"}],"source":"CPE_FIELD"},{"extracted_events":[{"fixed":"4.5.8"},{"introduced":"5.x"},{"fixed":"5.8.5"}],"source":"DESCRIPTION"}],"cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82531.json"},{"type":"ADVISORY","url":"https://github.com/smarty-php/smarty/releases/tag/v4.5.8"},{"type":"ADVISORY","url":"https://github.com/smarty-php/smarty/releases/tag/v5.8.5"},{"type":"ADVISORY","url":"https://github.com/smarty-php/smarty/security/advisories/GHSA-3w63-v7pm-cq9x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82531"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/smarty-before-4.5.8-and-5-x-before-5.8.5-php-code-injection-via-extends-inheritance-cache"},{"type":"FIX","url":"https://github.com/smarty-php/smarty/commit/1cba51cb813563eb61d963c83d28cd59f26b858d"},{"type":"FIX","url":"https://github.com/smarty-php/smarty/commit/c0fdd4824aca4f67e814b50703cfee1dfde41414"},{"type":"PACKAGE","url":"https://github.com/smarty-php/smarty"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/smarty-php/smarty","events":[{"introduced":"0"},{"fixed":"1cba51cb813563eb61d963c83d28cd59f26b858d"},{"fixed":"c0fdd4824aca4f67e814b50703cfee1dfde41414"},{"fixed":"042d310bdfbc67aa9138418d838d689b34f4c87e"},{"fixed":"0ae663525dcbc9e996feb2a867e43bc85f960938"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v4.5.7","v5.8.4","v5.8.3","v5.8.2","v5.8.1","v4.5.6","v5.8.0","v5.7.0","v5.6.0","v5.5.2","v5.5.1","v5.5.0","v5.4.5","v5.4.4","v4.5.5","v5.4.3","v5.4.2","v5.4.1","v4.5.4","v5.4.0","v4.5.3","v5.3.1","v5.3.0","v5.2.0","v5.1.0","v4.5.2","v4.5.1","v5.0.0","v4.5.0","v4.4.1","v4.4.0","checkout","v5.0.0-rc3","v4.3.5","v5.0.0-rc2","v4.3.4","v4.3.3","v5.0.0-rc1","v4.3.2","v4.3.1","v4.3.0","v4.2.1","v4.2.0","v4.1.1","v4.1.0","v4.0.4","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v3.1.40","v4.0.0-rc.0","v3.1.39","v3.1.38","v3.1.37.1","v3.1.37","v3.1.36","v3.1.35","v3.1.34","v3.1.33","v3.1.32","v3.1.31","v3.1.30","v3.1.29","v3.1.28","v2.6.28","v3.1.27","v3.1.26","v3.1.25","v3.1.24","v3.1.23","v3.1.21","v3.1.20","v3.1.19","v3.1.18","v3.1.17","v3.1.16","v3.1.15","v3.1.14","v3.1.13","v3.1.12","v3.1.11","v2.6.27","v2.6.26","v2.6.25","v2.6.24"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82531.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}