Phalcon Volt compiler `join` filter compile-time PHP code injection (SSTI leads to RCE)
High-risk advisory
CVE-2026-59989
Summary
Phalcon Volt compiler `join` filter compile-time PHP code injection (SSTI leads to RCE)
Why it matters
GitHub has published a reviewed security advisory for phalcon/cphalcon. Prioritize it with other application dependency updates.
Operator check
Check whether phalcon/cphalcon is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.