seroval: `seroval.fromJSON()` Promise resolver type confusion invokes attacker-controlled methods during deserialization

Date Jul 24, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product npm ยท seroval
CVE CVE-2026-59940
High-risk advisory CVE-2026-59940

Summary

seroval: `seroval.fromJSON()` Promise resolver type confusion invokes attacker-controlled methods during deserialization

Why it matters

GitHub has published a reviewed security advisory for seroval. Prioritize it with other application dependency updates.

Operator check

Check whether seroval 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.