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Uncontrolled Recursion

CVE-2026-45133

High
8.2/10

Summary

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to version 5.4.52, 6.x prior to 6.4.40, 7.x prior to 7.4.12 and 8.x prior to 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.

  • LOW
  • NETWORK
  • NONE
  • UNCHANGED
  • NONE
  • NONE
  • NONE
  • HIGH

CWE-674 - Uncontrolled Recursion

The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.

References

Advisory Timeline

  • Published