seroval affected by Denial of Service via RegExp serialization

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-23956
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-01-22 02:15:52 UTC
Updated2026-05-20 02:16:35 UTC
Descriptionseroval 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.000680000 probability, percentile 0.209630000 (date 2026-05-27)

Problem Types: CWE-1333 | CWE-1333 CWE-1333: Inefficient Regular Expression Complexity

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Lxsmnsyc Seroval All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Lxsmnsyc Seroval affected >= 0.2.0, < 1.4.1 Not specified

References

ReferenceSourceLinkTags
github.com/lxsmnsyc/seroval/security/advisories/GHSA-hx9m-jf43-8ffr [email protected] github.com Mitigation, Vendor Advisory
github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060 [email protected] github.com Patch
github.com/lxsmnsyc/seroval/blob/v0.2.0/packages/seroval/src/index.ts [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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