CVE-2026-23957

HIGH7.5EPSS 0.04%

Seroval affected by Denial of Service via Array serialization

Published: 1/21/2026Modified: 2/3/2026

Description

Overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to **significantly increase processing time**. **Mitigation**: `Seroval` no longer encodes array lengths. Instead, it computes length using `Array.prototype.length` during deserialization.

Affected packages (1)

npm/serovalfrom 0, < 1.4.1

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	HIGH7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (4)

ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-23957
PATCHhttps://github.com/lxsmnsyc/seroval
WEBhttps://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060
WEBhttps://github.com/lxsmnsyc/seroval/security/advisories/GHSA-66fc-rw6m-c2q6