What is CVE-2026-23957?

CVE-2026-23957 is a high-severity vulnerability in Lxsmnsyc Seroval, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-22.

How severe is CVE-2026-23957?

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

Resource exhaustion in Lxsmnsyc Seroval

CVE-2026-23957

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.

EPSS: 0.004 (32.2th percentile) — read the EPSS interpretation.

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.

Affected products

Lxsmnsyc Seroval — versions < 1.4.1

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-23957?: CVE-2026-23957 is a high-severity vulnerability in Lxsmnsyc Seroval, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-01-22.
How severe is CVE-2026-23957?: High severity. CVSS v3 base score is 7.5 out of 10.