What is CVE-2026-116581?

CVE-2026-116581 is a high-severity vulnerability in Lxsmnsyc Seroval, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2026-10-26.

How severe is CVE-2026-116581?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Lxsmnsyc Seroval

CVE-2026-116581

Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON and fromCrossJSON do not validate a sequence node's done index. A crafted done index can create an iterator that never finishes when application code consumes it to completion. An unauthenticated request to a service that deserializes untrusted input can therefore block the event loop, exhaust process memory, or make the service unavailable. This issue is fixed in version 1.6.8.

Published 2026-10-26 · last modified 2026-10-26.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Lxsmnsyc Seroval — versions < 1.6.8

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-116581?: CVE-2026-116581 is a high-severity vulnerability in Lxsmnsyc Seroval, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 7.5/10. Published 2026-10-26.
How severe is CVE-2026-116581?: High severity. CVSS v3 base score is 7.5 out of 10.