Seroval: `fromJSON()` Promise thenable assimilation invokes plugin-produced callables (bypass of GHSA-mv8w-475r-vwqw)

Date Oct 5, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product npm ยท seroval
CVE CVE-2026-104846
High-risk advisory CVE-2026-104846

Summary

Seroval: `fromJSON()` Promise thenable assimilation invokes plugin-produced callables (bypass of GHSA-mv8w-475r-vwqw)

Why it matters

GitHub has published a reviewed security advisory for seroval. Prioritize it with other application dependency updates, especially because EPSS places it in the 26% percentile.

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. EPSS probability: 0.3%; percentile: 26%.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.