CVE-2026-23956: CWE-1333: Inefficient Regular Expression Complexity in lxsmnsyc seroval
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.
AI Analysis
Technical Summary
The vulnerability in lxsmnsyc seroval affects versions from 0.2.0 up to but not including 1.4.1. Seroval extends JS value stringification beyond JSON.stringify capabilities, including RegExp serialization. Overriding RegExp serialization with very large patterns can cause memory exhaustion during deserialization. Additionally, patterns that trigger catastrophic backtracking can cause a ReDoS attack, impacting availability. The issue is tracked as CWE-1333 (Inefficient Regular Expression Complexity). The vendor fixed this vulnerability in version 1.4.1.
Potential Impact
Exploitation of this vulnerability can cause denial of service by exhausting JavaScript runtime memory or triggering catastrophic backtracking in regular expressions, leading to application unavailability. There is no impact on confidentiality or integrity reported. No known exploits in the wild have been identified.
Mitigation Recommendations
Upgrade to version 1.4.1 or later of lxsmnsyc seroval, where this vulnerability has been fixed. No other mitigations are indicated or necessary once the update is applied.
CVE-2026-23956: CWE-1333: Inefficient Regular Expression Complexity in lxsmnsyc seroval
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.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in lxsmnsyc seroval affects versions from 0.2.0 up to but not including 1.4.1. Seroval extends JS value stringification beyond JSON.stringify capabilities, including RegExp serialization. Overriding RegExp serialization with very large patterns can cause memory exhaustion during deserialization. Additionally, patterns that trigger catastrophic backtracking can cause a ReDoS attack, impacting availability. The issue is tracked as CWE-1333 (Inefficient Regular Expression Complexity). The vendor fixed this vulnerability in version 1.4.1.
Potential Impact
Exploitation of this vulnerability can cause denial of service by exhausting JavaScript runtime memory or triggering catastrophic backtracking in regular expressions, leading to application unavailability. There is no impact on confidentiality or integrity reported. No known exploits in the wild have been identified.
Mitigation Recommendations
Upgrade to version 1.4.1 or later of lxsmnsyc seroval, where this vulnerability has been fixed. No other mitigations are indicated or necessary once the update is applied.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-01-19T14:49:06.312Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 697186044623b1157c0a2c65
Added to database: 01/22/2026, 02:05:56 UTC
Last enriched: 05/20/2026, 18:17:30 UTC
Last updated: 09/10/2026, 19:36:53 UTC
Views: 219
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