symfony: Symfony is a PHP framework for web and console applications and a set of reusable PHP components
CVE-2026-45133 is fixed in symfony on 1 platform, first by DEBIAN-CVE-2026-45133, released May 27, 2026. It is not reported as exploited. Patch Radar priority: High.
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, when the parser is exposed to attacker-controlled input, deeply nested mappings or sequences cause both the block-level (Parser::parseBlock()) and inline (Inline::parseSequence() / Inline::parseMapping()) parsers to recurse without a depth limit. A crafted document exhausts the PHP stack and crashes the worker. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| symfony · Debian 12.15 (bookworm) | 5.4.53+dfsg-0+deb12u1 | DEBIAN-CVE-2026-45133 | May 27, 2026 |
| symfony · Debian 13.5 (trixie) | 6.4.41+dfsg-0+deb13u1 | DEBIAN-CVE-2026-45133 | May 27, 2026 |
| symfony · Debian 14 | 7.4.12+dfsg-1 | DEBIAN-CVE-2026-45133 | May 27, 2026 |
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