What’s Vulnerable › Vulnerabilities

CVE-2025-25290: @octokit/request has a Regular Expression in fetchWrapper that Leads to ReDoS Vulnerability Due to Catastrophic Backtracking

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-14 · updated 2026-06-17
• Weakness: CWE-1333

Description

@octokit/request sends parameterized requests to GitHub’s APIs with sensible defaults in browsers and Node. Starting in version 1.0.0 and prior to versions 9.2.1 and 8.4.1, 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. An 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. Versions 9.2.1 and 8.4.1 fix the issue.

Affected products

• octokit request.js: from 1.0.0, < 9.2.1

References

• https://github.com/octokit/request.js/commit/34ff07ee86fc5c20865982d77391bc910ef19c68
• https://github.com/octokit/request.js/commit/356411e3217019aa9fc8a68f4236af82490873c2
• https://github.com/octokit/request.js/commit/6bb29ba92a52f7bf94469c3433707c682c17126c
• https://github.com/octokit/request.js/releases/tag/v8.4.1
• https://github.com/octokit/request.js/releases/tag/v9.2.1
• https://github.com/octokit/request.js/security/advisories/GHSA-rmvr-2pp2-xj38

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