High severity7.5NVD Advisory· Published Jan 22, 2026· Updated Apr 6, 2026

CVE-2026-23957

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
serovalnpm	< 1.4.1	1.4.1

Affected products

Lxsmnsyc/Seroval
cpe:2.3:a:lxsmnsyc:seroval:*:*:*:*:*:node.js:*:*
Range: <1.4.1
ghsa-coords
pkg:npm/seroval
Range: < 1.4.1

Patches

Vulnerability mechanics

References

github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060nvdPatchWEB
github.com/advisories/GHSA-66fc-rw6m-c2q6ghsaADVISORY
github.com/lxsmnsyc/seroval/security/advisories/GHSA-66fc-rw6m-c2q6nvdMitigationVendor AdvisoryWEB
nvd.nist.gov/vuln/detail/CVE-2026-23957ghsaADVISORY

News mentions

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cvss	0.488
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000