CVE-2026-23736: seroval Affected by Prototype Pollution via JSON Deserialization
Due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This affects only JSON deserialization functionality.
As there is no known workaround, please upgrade to the latest version.
Other sources
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.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-23736?
CVE-2026-23736 is classified as a high severity vulnerability due to its potential for prototype pollution.
How do I fix CVE-2026-23736?
To remediate CVE-2026-23736, upgrade the seroval package to version 1.4.1 or later.
What impact does CVE-2026-23736 have on applications?
CVE-2026-23736 can lead to unexpected behavior in applications due to prototype pollution during JSON deserialization.
Is there a workaround for CVE-2026-23736?
Currently, there is no known workaround for CVE-2026-23736, and upgrading is the only solution.
Which versions of seroval are affected by CVE-2026-23736?
Versions of seroval prior to 1.4.1 are affected by CVE-2026-23736.