GHSA-wp97-x4hv-qvhp: seroval (CVE-2026-116584)

Package	Ecosystem	Affected	Fixed in
seroval	npm	>=1.4.1, <1.6.8	1.6.8

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Seroval versions >=1.4.1 and <1.6.8 are affected. In `fromJSON` and `fromCrossJSON`, an array node's length was not checked, so a small crafted payload could control how much memory the decoder allocated and how long it looped. An unauthenticated attacker who can send input to a service that passes it to these functions can exhaust memory or block the thread, making the service unavailable. Upgrade to seroval 1.6.8, which rejects malformed array nodes; the source lists no workaround.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0037, the 30th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

26 Oct 2026, 20:52 UTC Confirmed by the CVE List
26 Oct 2026, 21:18 UTC Confirmed by NVD
31 Oct 2026, 13:32 UTC First seen by agentprime
31 Oct 2026, 13:32 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.