CVE-2026-23736CRITICAL 9.8EPSS p15.7%

CVE-2026-23736CVE-2026-23736

Description

seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.25% probability of exploitation · percentile 15.7% · 2026-06-19T12:03:05Z
Published2026-01-21
Last modified2026-02-27

Underlying weaknesses· 1

CWE-1321

References

  1. https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060
  2. https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hj76-42vx-jwp4

1

TypeTargetConfidenceTier
WeaknessImproperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')cwe-13210%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.