CVE-2026-45304
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Symfony: YAML Parser Exponential Memory Allocation via Recursive Collection-Alias Expansion ("Billion Laughs")
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, Symfony\Component\Yaml\Parser resolved YAML collection aliases recursively, allowing a small untrusted YAML input to expand into a multi-gigabyte structure and exhaust memory. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
symfony
- Vendor
- symfony
- Product
- symfony
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| < 5.4.52 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 6.0.0-BETA1, < 6.4.40 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 7.0.0-BETA1, < 7.4.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 8.0.0-BETA1, < 8.0.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
yaml
- Vendor
- symfony
- Product
- yaml
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| < 5.4.52 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 6.0.0-BETA1, < 6.4.40 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 7.0.0-BETA1, < 7.4.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| >= 8.0.0-BETA1, < 8.0.12 | affected | Unavailable | Unavailable | Unavailable | None listed |