What is the CVSS score of CVE-2026-23736?

CVE-2026-23736 has a CVSS 3.1 base score of 7.3 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.2%.

Which versions of Seroval are affected by CVE-2026-23736?

CVE-2026-23736 presents moderate security risk, a prototype pollution vulnerability rated CVSS 7.3. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2026-23736?

Within 7 days: Identify all affected systems and apply vendor patches promptly. Vendor patch is available.

Seroval CVE-2026-23736

HIGH

Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution) (CWE-1321)

2026-01-21 security-advisories@github.com

GHSA-hj76-42vx-jwp4

Deserialization Red Hat Seroval Suse Lxsmnsyc

7.3

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.3 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

SUSE

HIGH

qualitative

Red Hat

7.3 HIGH

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

Patch released

Feb 27, 2026 - 19:36 nvd

Patch available

CVE Published

Jan 21, 2026 - 23:15 nvd

HIGH 7.3

DescriptionGitHub Advisory

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.

AnalysisAI

Seroval is affected by improperly controlled modification of object prototype attributes (prototype pollution) (CVSS 7.3).

Technical ContextAI

This vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)) affects Seroval. 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.