CVE-2026-23957

Name: CVE-2026-23957
Creator: NVD / NIST
Published: 2026-01-22T02:15:52.47+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2026-23957 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.40%

31.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Lxsmnsyc	Seroval	< 1.4.1

References

https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060Patch
https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-66fc-rw6m-c2q6Mitigation, Vendor Advisory

Timeline

Published: Jan 22, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-23957?

How severe is CVE-2026-23957?

CVE-2026-23957 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2026-23957?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-23957?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST