Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
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::cleanup() used regular expressions with overlapping quantifiers for YAML directive, comment, and document marker cleanup, allowing crafted input to make parsing hang for an arbitrarily long time. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
🚨 HIGH: CVE-2026-45305 (CVSS 7.5) Symfony PHP framework vulnerable to ReDoS attack via crafted YAML input causing indefinite parsing hang. Affected: <5.4.52, <6.4.40, <7.4.12, <8.0.12 Patch immediately. #CVE #Vulnerability #PatchNow https://t.co/Vngzcgu361
Post summary
The tweet announces a high‑severity ReDoS vulnerability (CVE‑2026‑45305) in Symfony, lists the affected versions, and urges users to apply the patch immediately.
1 of 1 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | sensiolabs | symfony | - | - | - |