High severityOSV Advisory· Published Jan 21, 2026· Updated Jan 22, 2026
seroval Affected by Prototype Pollution via JSON Deserialization
CVE-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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
serovalnpm | < 1.4.1 | 1.4.1 |
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-hj76-42vx-jwp4ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-23736ghsaADVISORY
- github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060ghsax_refsource_MISCWEB
- github.com/lxsmnsyc/seroval/security/advisories/GHSA-hj76-42vx-jwp4ghsax_refsource_CONFIRMWEB
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