SB2025070442 - Inefficient regular expression complexity in octokit request

Description

This security bulletin contains information about 1 security vulnerability.

1) Inefficient regular expression complexity (CVE-ID: CVE-2025-25290)

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

The vulnerability exists due to the regular expression `/<([^>]+)>; rel="deprecation"/` used to match the `link` header in HTTP responses is vulnerable to a ReDoS (Regular Expression Denial of Service) attack. This vulnerability arises due to the unbounded nature of the regex's matching behavior, which can lead to catastrophic backtracking when processing specially crafted input. A remote attacker could exploit this flaw by sending a malicious `link` header, resulting in excessive CPU usage and potentially causing the server to become unresponsive, impacting service availability.

Remediation

Install update from vendor's website.

References

• https://github.com/octokit/request.js/commit/34ff07ee86fc5c20865982d77391bc910ef19c68
• https://github.com/octokit/request.js/security/advisories/GHSA-rmvr-2pp2-xj38