Composer symfony/yaml has 6 known advisories in the phpwarden feed. Feed 2026.10.29.1, updated 2026-10-28.
| CVE | Title | Severity | CVSS | Affected | Fixed in |
|---|---|---|---|---|---|
| CVE-2013-1348 | Symphony Vulnerable to PHP Code Injection via YAML Parsing | high | 0.0 | >=2.0.0 and <2.0.22 | 2.0.22 |
| CVE-2013-1397 | Symfony Arbitrary PHP code Execution | high | 0.0 | >=2.0.0 and <2.0.22 or >=2.1.0 and <2.1.7 or >=2.2.0-BETA1 and <2.2.0-BETA2 | 2.0.22, 2.1.7, 2.2.0-BETA2 |
| CVE-2026-45304 | Symfony's YAML Parser Vulnerable to Exponential Memory Allocation via Recursive Collection-Alias Expansion ("Billion Laughs") | low | 0.0 | <5.4.52 or >=6.0.0 and <6.4.40 or >=7.0.0 and <7.4.12 or >=8.0.0 and <8.0.12 or >=2.0.0 and <3.0.0 or >=3.0.0 and <4.0.0 or >=4.0.0 and <5.0.0 or >=5.0.0 and <5.1.0 or >=5.1.0 and <5.2.0 or >=5.2.0 and <5.3.0 or >=5.3.0 and <5.4.0 or >=5.4.0 and <5.4.52 or >=6.0.0 and <6.1.0 or >=6.1.0 and <6.2.0 or >=6.2.0 and <6.3.0 or >=6.3.0 and <6.4.0 or >=6.4.0 and <6.4.40 or >=7.0.0 and <7.1.0 or >=7.1.0 and <7.2.0 or >=7.2.0 and <7.3.0 or >=7.3.0 and <7.4.0 or >=7.4.0 and <7.4.12 | 5.4.52, 6.4.40, 7.4.12, 8.0.12 |
| CVE-2026-45305 | Symfony's YAML Parser has a ReDoS via Catastrophic Backtracking in Parser::cleanup() Regex | low | 0.0 | <5.4.52 or >=6.0.0 and <6.4.40 or >=7.0.0 and <7.4.12 or >=8.0.0 and <8.0.12 or >=2.0.0 and <3.0.0 or >=3.0.0 and <4.0.0 or >=4.0.0 and <5.0.0 or >=5.0.0 and <5.1.0 or >=5.1.0 and <5.2.0 or >=5.2.0 and <5.3.0 or >=5.3.0 and <5.4.0 or >=5.4.0 and <5.4.52 or >=6.0.0 and <6.1.0 or >=6.1.0 and <6.2.0 or >=6.2.0 and <6.3.0 or >=6.3.0 and <6.4.0 or >=6.4.0 and <6.4.40 or >=7.0.0 and <7.1.0 or >=7.1.0 and <7.2.0 or >=7.2.0 and <7.3.0 or >=7.3.0 and <7.4.0 or >=7.4.0 and <7.4.12 | 5.4.52, 6.4.40, 7.4.12, 8.0.12 |
| CVE-2026-45133 | Symfony hardened the parser when handling untrusted input | low | 0.0 | <5.4.52 or >=6.0.0 and <6.4.40 or >=7.0.0 and <7.4.12 or >=8.0.0 and <8.0.12 or >=2.0.0 and <3.0.0 or >=3.0.0 and <4.0.0 or >=4.0.0 and <5.0.0 or >=5.0.0 and <5.1.0 or >=5.1.0 and <5.2.0 or >=5.2.0 and <5.3.0 or >=5.3.0 and <5.4.0 or >=5.4.0 and <5.4.52 or >=6.0.0 and <6.1.0 or >=6.1.0 and <6.2.0 or >=6.2.0 and <6.3.0 or >=6.3.0 and <6.4.0 or >=6.4.0 and <6.4.40 or >=7.0.0 and <7.1.0 or >=7.1.0 and <7.2.0 or >=7.2.0 and <7.3.0 or >=7.3.0 and <7.4.0 or >=7.4.0 and <7.4.12 | 5.4.52, 6.4.40, 7.4.12, 8.0.12 |
| CVE-2026-109413 | Symfony: Unbounded Recursion in the YAML Inline Lexer Lets a Single Document Crash the Process | high | 0.0 | >=2.0.0 and <5.4.54 or >=6.0.0 and <6.4.45 or >=7.0.0 and <7.4.18 or >=8.0.0 and <8.1.6 or >=2.0.0 and <3.0.0 or >=3.0.0 and <4.0.0 or >=4.0.0 and <5.0.0 or >=5.0.0 and <5.1.0 or >=5.1.0 and <5.2.0 or >=5.2.0 and <5.3.0 or >=5.3.0 and <5.4.0 or >=5.4.0 and <5.4.54 or >=6.0.0 and <6.1.0 or >=6.1.0 and <6.2.0 or >=6.2.0 and <6.3.0 or >=6.3.0 and <6.4.0 or >=6.4.0 and <6.4.45 or >=7.0.0 and <7.1.0 or >=7.1.0 and <7.2.0 or >=7.2.0 and <7.3.0 or >=7.3.0 and <7.4.0 or >=7.4.0 and <7.4.18 or >=8.0.0 and <8.1.0 or >=8.1.0 and <8.1.6 | 5.4.54, 6.4.45, 7.4.18, 8.1.6 |
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