CVE-2026-108736
Speedtest Tracker through 1.15.0 IP Allowlist Bypass via X-Forwarded-For Spoofing
- State
- Published
- Severity
- 6.3 Medium
- Published
- Oct 11, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 11, 2026
Description
Speedtest Tracker through 1.15.0 contains an IP allowlist bypass vulnerability that allows unauthenticated remote attackers to evade ALLOWED_IPS and Prometheus allowlists by spoofing X-Forwarded-For headers. Because bootstrap/app.php trusts every peer as a proxy, attackers can supply an allowlisted address to read /prometheus metrics and reach protected web and API endpoints.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 3.7 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-348 Use of Less Trusted Source
Affected Products
| Product | Versions |
|---|---|
speedtest-trackeralexjustesen |
|
References
- https://hackmd.io/@haind03/speedtest-tracker-trust-proxies-allowlist-bypassthird-party-advisory
- https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/bootstrap/app.php#L23-L41technical-description
- https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/app/Http/Middleware/AllowedIpAddressesMiddleware.php#L16-L27technical-description
- https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/app/Http/Middleware/PrometheusAllowedIpMiddleware.php#L22-L42technical-description
- https://github.com/alexjustesen/speedtest-trackerproduct
- VulnCheck Advisory: Speedtest Tracker through 1.15.0 IP Allowlist Bypass via X-Forwarded-For Spoofingthird-party-advisory
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