CVE-2026-23956 HIGH

CVE-2026-23956: seroval affected by Denial of Service via RegExp serialization

Vendor Lxsmnsyc
Product seroval
Weakness CWE-1333
Published January 22, 2026
Last update May 20, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 22, 2026 CVE published
May 20, 2026 Record updated