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

Quick assessment

Affected
lxsmnsyc seroval
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

seroval是Alexis H. Munsayac个人开发者的一个格式化Java库。 seroval 1.4.0及之前版本存在安全漏洞，该漏洞源于反序列化特制RegExp时可能耗尽内存或导致正则表达式拒绝服务。

CVSS 7.5 · High EPSS 0.55% · P44

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
lxsmnsyc seroval >= 0.2.0, < 1.4.1 affected
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I. Basic Information for CVE-2026-23956

Vulnerability Information
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Vulnerability Title
seroval affected by Denial of Service via RegExp serialization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
seroval 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
seroval是Alexis H. Munsayac个人开发者的一个格式化Java库。 seroval 1.4.0及之前版本存在安全漏洞，该漏洞源于反序列化特制RegExp时可能耗尽内存或导致正则表达式拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
lxsmnsyc seroval >= 0.2.0, < 1.4.1 -

II. Public POCs for CVE-2026-23956

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III. Intelligence Information for CVE-2026-23956

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Patches & Fixes for CVE-2026-23956 (2)

Same Patch Batch · lxsmnsyc · 2026-01-22 · 3 CVEs total

CVE-2026-23957 7.5 HIGH seroval is vulnerable to Denial of Service via array serialization
CVE-2026-24006 7.5 HIGH Seroval affected by Denial of Service via Deeply Nested Objects

IV. Related Vulnerabilities

Same product: seroval
Same vendor: lxsmnsyc
Same weakness: CWE-1333

V. Comments for CVE-2026-23956

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