CVE-2026-69183
- Source
- https://cve.org/CVERecord?id=CVE-2026-69183
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-69183.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-69183
- Aliases
-
- GHSA-c878-p3jh-mmjf
- Published
- 2026-08-20T16:16:43Z
- Modified
- 2026-09-20T11:31:04Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- Monkeytype: Rate-limit and anti-brute-force controls bypassable via spoofed HTTP headers (forgotPasswordEmail/verificationEmail mail bombing and badAuth bypass)
- Details
-
Monkeytype is a minimalistic and customizable typing test. In 26.26.0 and earlier, the backend rate-limit key generator in backend/src/middlewares/rate-limit.ts uses client-controlled cf-connecting-ip and x-forwarded-for headers before the trust-proxy-derived req.ip value. An unauthenticated attacker can rotate either header to create a new bucket for each request, bypassing rootRateLimiter, badAuthRateLimiter, getKey(), and the getKeyWithUid() fallback used by public endpoints. This permits repeated POST /users/forgotPasswordEmail and verificationEmail requests, mail bombing registered users, consuming Firebase or SMTP quota, evading brute-force protection, and enabling resource exhaustion. Exploitability of cf-connecting-ip depends on deployment topology, but x-forwarded-for and direct-to-origin paths remain affected when those values are not overwritten by a trusted proxy. No fixed version is available as of this review.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-290", "CWE-307", "CWE-644" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69183.json" }- References