JavaScript Value Stringification Vulnerability in Seroval by lxsmnsyc
CVE-2026-116581

7.5HIGH

Key Information:

Vendor

Lxsmnsyc

Status
Seroval
Vendor
CVE Published:
26 October 2026

What is CVE-2026-116581?

Seroval, a library that enhances JavaScript stringification capabilities, had a flaw prior to version 1.6.8. Specifically, the functions fromJSON and fromCrossJSON failed to validate the 'done' index of sequence nodes. This oversight allows for the creation of an iterator that can become indefinitely unresolved when utilized in application code. Consequently, an unauthenticated request targeting a service that decodes untrusted inputs can lead to significant issues, which may include blocking the event loop, depleting process memory, or rendering the service unavailable. Users are advised to upgrade to version 1.6.8 or later to mitigate these risks.

Affected Version(s)

seroval < 1.6.8

References

https://github.com/lxsmnsyc/seroval/security/advisories/G...
x_refsource_CONFIRM
https://github.com/lxsmnsyc/seroval/commit/e176f9267e59dd...
x_refsource_MISC
https://github.com/lxsmnsyc/seroval/releases/tag/seroval@...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.