Symfony: ReDoS in HeaderUtils::split() Reachable Through the Cache-Control Request Header
High-risk advisory
CVE-2026-108082
Summary
Symfony: ReDoS in HeaderUtils::split() Reachable Through the Cache-Control Request Header
Why it matters
GitHub has published a reviewed security advisory for symfony/http-foundation. Prioritize it with other application dependency updates, especially because EPSS places it in the 41% percentile.
Operator check
Check whether symfony/http-foundation is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 8.7. EPSS probability: 0.5%; percentile: 41%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.