CVE-2026-23956

HIGH

seroval 0.2.0-1.4.0 - Regular Expression Denial of Service via RegExp Serialization Override

Title source: llm
STIX 2.1

Description

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 0.2.0 through 1.4.0, overriding RegExp serialization with extremely large patterns can exhaust JavaScript runtime memory during deserialization. Additionally, overriding RegExp serialization with patterns that trigger catastrophic backtracking can lead to ReDoS (Regular Expression Denial of Service). This issue has been fixed in version 1.4.1.

References (3)

Core 3

Scores

CVSS v3 7.5
EPSS 0.0048
EPSS Percentile 37.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-1333
Status published
Products (3)
lxsmnsyc/seroval < 1.4.1 (2 CPE variants)
lxsmnsyc/seroval >= 0.2.0, < 1.4.1
npm/seroval 0.2.0 - 1.4.1npm
Published Jan 22, 2026
Tracked Since Feb 18, 2026