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TI-2026-19110 Aliases CVE-2026-23737GHSA-3rxj-6cgf-8cfw

seroval Affected by Remote Code Execution via JSON Deserialization

Priority LOW 36CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, improper input handling in the JSON deserialization component can lead to arbitrary JavaScript code execution. Exploitation is possible via overriding constant value and error deserialization, allowing indirect access to unsafe JS evaluation. At minimum, attackers need the ability to perform 4 separate requests on the same function, and partial knowledge of how the serialized data is used during later runtime processing. This vulnerability affects the fromJSON and fromCrossJSON functions in a client-to-server transmission scenario. This issue has been fixed in version 1.4.0.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00582 48th percentileScored 2026-11-07
Fix Fixed seroval (lxsmnsyc): 1.4.1seroval (npm): 1.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lxsmnsycserovalbefore 1.4.11.4.1Patch availableCNA
—seroval (npm)before 1.4.11.4.1Patch availableGHSA-3rxj-6cgf-8cfw
  • seroval Vendorlxsmnsyc Affected before 1.4.1 Fixed in 1.4.1 Patch available CNA
  • seroval (npm) Vendor— Affected before 1.4.1 Fixed in 1.4.1 Patch available GHSA-3rxj-6cgf-8cfw

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:lxsmnsyc:seroval:*:*:*:*:*:node.js:*:*before 1.4.1Vulnerablelxsmnsyc
  • cpe:2.3:a:lxsmnsyc:seroval:*:*:*:*:*:node.js:*:* Versions before 1.4.1 Vulnerable ·lxsmnsyc

Remediation

  • Fix · CNA seroval (lxsmnsyc) Fixed in 1.4.1
  • Fix · GHSA-3rxj-6cgf-8cfw seroval (npm) Fixed in 1.4.1 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23737
  2. 2026-10-03 Alias added: GHSA-3rxj-6cgf-8cfw

References

Patch 1

Advisory 2

Other 1

  • TI-2026-19109 seroval Affected by Prototype Pollution via JSON Deserialization CVSS 3.1CRITICAL 9.8
  • TI-2026-19298 seroval affected by Denial of Service via RegExp serialization CVSS 3.1HIGH 7.5
  • TI-2026-19345 Seroval affected by Denial of Service via Deeply Nested Objects CVSS 3.1HIGH 7.5
  • TI-2026-19299 seroval is vulnerable to Denial of Service via array serialization CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences