What’s Vulnerable › Vulnerabilities

CVE-2025-25289: @octokit/request-error has a Regular Expression in index 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: 0.6% 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-error is an error class for Octokit request errors. Starting in version 1.0.0 and prior to version 6.1.7, a Regular Expression Denial of Service (ReDoS) vulnerability exists in the processing of HTTP request headers. By sending an authorization header containing an excessively long sequence of spaces followed by a newline and "@", an attacker can exploit inefficient regular expression processing, leading to excessive resource consumption. This can significantly degrade server performance or cause a denial-of-service (DoS) condition, impacting availability. Version 6.1.7 contains a fix for the issue.

Affected products

• octokit request-error.js: from 1.0.0, < 6.1.7

References

• 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

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