FrankenPHP: Cross-request PHP session ID leak in worker mode when the session extension is a shared module
High-risk advisory
CVE-2026-82416
Summary
FrankenPHP: Cross-request PHP session ID leak in worker mode when the session extension is a shared module
Why it matters
GitHub has published a reviewed security advisory for github.com/dunglas/frankenphp. Prioritize it with other application dependency updates, especially because EPSS places it in the 13% percentile.
Operator check
Check whether github.com/dunglas/frankenphp is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.2%; percentile: 13%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.