CVE-2026-116580

Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check

High 7.3 Reserved 2026-10-26 · Published 2026-10-26 · Updated 2026-11-02

Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8.

Assigner
GitHub_M
State
Published

Seen in other sources

Scores

SourceCVSSScoreSeverityVector
GitHub_M3.17.3HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Weaknesses

Affected

VendorProductVersions
lxsmnsyc seroval < 1.6.8 (affected)

References

Full CVE JSON record (5.2)

API · GitHub · cve.org

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