What is the CVSS score of CVE-2026-23957?

CVE-2026-23957 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Red Hat are affected by CVE-2026-23957?

CVE-2026-23957 presents notable security risk rated CVSS 7.5. Exploitation could compromise the security of affected deployments.. A patch is available.

How to fix or mitigate CVE-2026-23957?

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

Red Hat CVE-2026-23957

HIGH

Allocation of Resources Without Limits or Throttling (CWE-770)

2026-01-22 security-advisories@github.com

GHSA-66fc-rw6m-c2q6

Deserialization Denial Of Service Red Hat Suse

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

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

SUSE

HIGH

qualitative

Red Hat

7.5 HIGH

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Patch released

Apr 06, 2026 - 13:51 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 22, 2026 - 02:15 nvd

HIGH 7.5

DescriptionGitHub Advisory

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.

AnalysisAI

Seroval versions 1.4.0 and below are vulnerable to denial of service through malformed deserialization payloads that specify excessively large array lengths, causing the parsing process to consume excessive CPU resources and become unresponsive. An unauthenticated remote attacker can exploit this without user interaction by sending a crafted serialized object to any application using the vulnerable library. The vulnerability has been patched in version 1.4.1.

Technical ContextAI

Classified as CWE-770 (Allocation of Resources Without Limits or Throttling). Affects Seroval. 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.