Inefficient regular expression complexity in request-error.js - CVE-2025-25289

Detailed vulnerability description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions in the processing of HTTP request headers. A remote attacker can send an authorization header containing an excessively long sequence of spaces followed by a newline and "@" to exploit inefficient regular expression processing and leading to excessive resource consumption.

How to mitigate CVE-2025-25289

Sources

• https://github.com/octokit/request-error.js/blob/main/src/index.ts
• https://github.com/octokit/request-error.js/commit/d558320874a4bc8d356babf1079e6f0056a59b9e
• https://github.com/octokit/request-error.js/security/advisories/GHSA-xx4v-prfh-6cgc