{"id":"CVE-2026-46629","aliases":["DEBIAN-CVE-2026-46629","EUVD-2026-44568","GHSA-35wc-cvqg-78fp","UBUNTU-CVE-2026-46629"],"status":"published","title":"Twig: Unbounded formatter memoisation in twig/intl-extra keyed on template-controlled arguments","description":"Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\\Environment. This issue is fixed in version 3.26.0.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00542,"percentile":0.45901,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-05-21T21:23:53Z","modified":"2026-10-28T02:30:59Z","fixes":[{"ecosystem":"Packagist","package":"twig/intl-extra","fixed_in":["3.26.0"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:12","package":"php-twig","fixed_in":["3.5.1-1+deb12u3"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"php-twig","fixed_in":["3.27.0-0+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"php-twig","fixed_in":["3.26.0-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"twig/intl-extra","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.26.0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.1-1+deb12u3"}]}],"versions":["3.5.1-1","3.5.1-1+deb12u1","3.5.1-1+deb12u2"]},{"source":"osv","ecosystem":"Debian:13","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.27.0-0+deb13u1"}]}],"versions":["3.20.0-2","3.21.1-1","3.21.1-2","3.21.1-3","3.22.0-1","3.22.0-2","3.22.1-1","3.22.1-2","3.22.1-3","3.22.2-1","3.22.2-2","3.23.0-1","3.23.0-2","3.24.0-1","3.26.0-0+deb13u1","3.26.0-1"]},{"source":"osv","ecosystem":"Debian:14","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.26.0-1"}]}],"versions":["3.20.0-2","3.21.1-1","3.21.1-2","3.21.1-3","3.22.0-1","3.22.0-2","3.22.1-1","3.22.1-2","3.22.1-3","3.22.2-1","3.22.2-2","3.23.0-1","3.23.0-2","3.24.0-1"]},{"source":"osv","ecosystem":"Packagist","package":"twig/intl-extra","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.26.0"}]}],"versions":["v2.12.0","v2.12.1","v2.12.2","v2.12.3","v2.12.4","v2.12.5","v2.13.0","v2.13.1","v2.14.0","v2.14.1","v2.14.2","v2.14.3","v2.14.7","v2.14.8","v2.14.9","v2.15.0","v2.15.2","v2.15.4","v2.15.5","v2.15.6","v2.16.0","v3.0.0","v3.0.0-BETA1","v3.0.1","v3.0.2","v3.0.3","v3.0.4","v3.0.5","v3.1.0","v3.1.1","v3.10.0","v3.11.0","v3.12.0","v3.13.0","v3.15.0","v3.16.0","v3.17.0","v3.18.0","v3.19.0","v3.2.1","v3.20.0","v3.21.0","v3.22.0","v3.22.1","v3.23.0","v3.24.0","v3.3.0","v3.3.3","v3.3.4","v3.3.5","v3.4.0","v3.4.2","v3.5.0","v3.5.1","v3.6.0","v3.7.0","v3.7.1","v3.8.0","v3.9.0","v3.9.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.11.3-2","2.12.1-1","2.12.2-1","2.12.3-1","2.12.5-1","2.12.5-1ubuntu0.1~esm1","2.12.5-1ubuntu0.1~esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.2-1ubuntu3","3.3.4-1","3.3.6-1","3.3.7-1","3.3.8-2ubuntu4","3.3.8-2ubuntu4+esm1","3.3.8-2ubuntu4+esm2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.0-1","3.7.1-1","3.8.0-2","3.8.0-2ubuntu0.1~esm1","3.8.0-2ubuntu1","3.8.0-2ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.20.0-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.23.0-2build7","3.27.1-1","3.28.0-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"php-twig","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.20.0-2ubuntu1","3.23.0-2build5","3.23.0-2build7","3.23.0-2ubuntu0.1~esm1"]}],"products":[{"vendor":"symfony","product":"twig"},{"vendor":"twigphp","product":"twig"}],"references":[{"url":"https://github.com/twigphp/Twig/security/advisories/GHSA-35wc-cvqg-78fp","tags":["x_refsource_CONFIRM","Vendor Advisory","advisory","web"]},{"url":"https://github.com/twigphp/Twig/commit/6add9066fc5c0455eb764c1f3af6e4e4e3562419","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/twigphp/Twig/releases/tag/v3.26.0","tags":["x_refsource_MISC","Release Notes","web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/intl-extra/CVE-2026-46629.yaml","tags":["web"]},{"url":"https://symfony.com/cve-2026-46629","tags":["web"]},{"url":"https://github.com/advisories/GHSA-35wc-cvqg-78fp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46629.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46629","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-46629","tags":["advisory"]},{"url":"https://github.com/twigphp/Twig","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2026-46629","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46629","tags":["report"]},{"url":"https://symfony.com/blog/cve-2026-46629-unbounded-formatter-memoisation-in-twig-intl-extra-keyed-on-template-controlled-arguments","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-46629","title":"Twig: Unbounded formatter memoisation in twig/intl-extra keyed on template-controlled arguments","description":"Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\\Environment. This issue is fixed in version 3.26.0.","status":"published","published":"2026-07-14T21:22:15.595Z","modified":"2026-07-15T12:53:13.636Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T13:46:55.086623Z"}],"euvd":[{"id":"EUVD-2026-44568","description":"Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\\Environment. This issue is fixed in version 3.26.0.","status":"published","published":"2026-07-14T21:22:15Z","modified":"2026-07-15T12:53:13Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:19:53.226345Z"}],"ghsa":[{"id":"GHSA-35wc-cvqg-78fp","title":"twig/intl-extra: Unbounded formatter memoisation in keyed on template-controlled arguments","description":"### Description\n\n`IntlExtension` memoises every `\\IntlDateFormatter` and `\\NumberFormatter` it creates in instance-level arrays keyed on a hash that includes `locale`, `pattern`, `attrs` and other values that are ordinary named arguments of the `format_datetime` / `format_date` / `format_time` / `format_number` / `format_currency` filters. There is no size limit and no eviction.\n\nA template that iterates over many distinct `pattern` (or `locale`, or `grouping_used`, ...) values therefore allocates one ICU formatter object per distinct value and pins it for the entire lifetime of the `Twig\\Environment`. Because ICU allocates its backing buffers outside the Zend memory manager, this growth is not bounded by `memory_limit`. On long-running runtimes (RoadRunner, Swoole, FrankenPHP worker mode, ReactPHP) where the `Environment` outlives a single request, the cache also accumulates across requests.\n\n### Resolution\n\nThe formatter caches are now bounded in size (100 entries each) and evict on a FIFO basis.\n\n### Credits\n\nTwig would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.","status":"published","published":"2026-05-21T21:23:53Z","modified":"2026-05-21T21:23:53Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U","level":"low"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:40:13.628377Z"}],"nvd":[{"id":"CVE-2026-46629","description":"Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\\Environment. This issue is fixed in version 3.26.0.","status":"published","published":"2026-07-14T22:16:55.86Z","modified":"2026-10-24T22:10:00.21Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:12:29.879716Z"}],"osv":[{"id":"CVE-2026-46629","title":"Twig: Unbounded formatter memoisation in twig/intl-extra keyed on template-controlled arguments","description":"Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\\Environment. This issue is fixed in version 3.26.0.","status":"published","published":"2026-07-14T21:22:15.595Z","modified":"2026-10-28T02:30:59.037757788Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:45:06.231145Z"},{"id":"DEBIAN-CVE-2026-46629","description":"Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\\Environment. This issue is fixed in version 3.26.0.","status":"published","published":"2026-07-14T22:16:55.86Z","modified":"2026-10-25T09:47:31.778653069Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:56.444225Z"},{"id":"GHSA-35wc-cvqg-78fp","title":"twig/intl-extra: Unbounded formatter memoisation in keyed on template-controlled arguments","description":"### Description\n\n`IntlExtension` memoises every `\\IntlDateFormatter` and `\\NumberFormatter` it creates in instance-level arrays keyed on a hash that includes `locale`, `pattern`, `attrs` and other values that are ordinary named arguments of the `format_datetime` / `format_date` / `format_time` / `format_number` / `format_currency` filters. There is no size limit and no eviction.\n\nA template that iterates over many distinct `pattern` (or `locale`, or `grouping_used`, ...) values therefore allocates one ICU formatter object per distinct value and pins it for the entire lifetime of the `Twig\\Environment`. Because ICU allocates its backing buffers outside the Zend memory manager, this growth is not bounded by `memory_limit`. On long-running runtimes (RoadRunner, Swoole, FrankenPHP worker mode, ReactPHP) where the `Environment` outlives a single request, the cache also accumulates across requests.\n\n### Resolution\n\nThe formatter caches are now bounded in size (100 entries each) and evict on a FIFO basis.\n\n### Credits\n\nTwig would like to thank Claude Mythos Preview (via Project Glasswing) for reporting the issue and providing the fix.","status":"published","published":"2026-05-21T21:23:53Z","modified":"2026-09-10T03:51:04.305805496Z","cvss":[{"version":"4.0","score":2.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U","level":"low"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:46:35.406455Z"},{"id":"UBUNTU-CVE-2026-46629","description":"Twig is a template language for PHP. Prior to 3.26.0, twig/intl-extra memoises IntlDateFormatter and NumberFormatter instances in arrays keyed by template-controlled filter arguments such as locale, pattern, and attrs, allowing a template to allocate many ICU formatter objects that remain pinned for the lifetime of the Twig\\Environment. This issue is fixed in version 3.26.0.","status":"published","published":"2026-07-14T22:16:00Z","modified":"2026-10-17T12:58:24.978407829Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","level":"medium"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:30.797112Z"}]}}