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TI-2026-19299 Aliases CVE-2026-23957GHSA-66fc-rw6m-c2q6

seroval is vulnerable to Denial of Service via array serialization

Priority LOW 39CWE-770Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, overriding encoded array lengths by replacing them with an excessively large value causes the deserialization process to significantly increase processing time. This issue has been fixed in version 1.4.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00439 38th 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
Yes
Technical impact
Partial

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-66fc-rw6m-c2q6
  • 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-66fc-rw6m-c2q6

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-66fc-rw6m-c2q6 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-2026-23957
  2. 2026-10-03 Alias added: GHSA-66fc-rw6m-c2q6

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-2026-19110 seroval Affected by Remote Code Execution via JSON Deserialization CVSS 3.1HIGH 7.5

Sources

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