CVE-2023-24807

Name: CVE-2023-24807
Creator: NVD / NIST
Published: 2023-02-16T18:15:12.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.31%

Last modified Jun 17, 2026

CVE-2023-24807 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Undici is an HTTP/1.1 client for Node.js. Prior to version 5.19.1, the `Headers.set()` and `Headers.append()` methods are vulnerable to Regular Expression Denial of Service (ReDoS) attacks when untrusted values are passed into the functions. EPSS estimates a 1.31% chance of exploitation in the next 30 days.

Description

Undici is an HTTP/1.1 client for Node.js. Prior to version 5.19.1, the `Headers.set()` and `Headers.append()` methods are vulnerable to Regular Expression Denial of Service (ReDoS) attacks when untrusted values are passed into the functions. This is due to the inefficient regular expression used to normalize the values in the `headerValueNormalize()` utility function. This vulnerability was patched in v5.19.1. No known workarounds are available.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.31%

67.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nodejs	Undici	< 5.19.1

References

https://github.com/nodejs/undici/commit/f2324e549943f0b0937b09fb1c0c16cc7c93abdfPatch
https://github.com/nodejs/undici/releases/tag/v5.19.1Release Notes
https://github.com/nodejs/undici/security/advisories/GHSA-r6ch-mqf9-qc9wVendor Advisory
https://hackerone.com/bugs?report_id=1784449Permissions Required, Third Party Advisory
https://github.com/nodejs/undici/commit/f2324e549943f0b0937b09fb1c0c16cc7c93abdfPatch
https://github.com/nodejs/undici/releases/tag/v5.19.1Release Notes
https://github.com/nodejs/undici/security/advisories/GHSA-r6ch-mqf9-qc9wVendor Advisory
https://hackerone.com/bugs?report_id=1784449Permissions Required, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230324-0010/

Timeline

Published: Feb 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-24807?

How severe is CVE-2023-24807?

CVE-2023-24807 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.31% probability of exploitation in the next 30 days.

How do I fix CVE-2023-24807?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-24807?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST