Speedtest Tracker through 1.15.0 IP Allowlist Bypass via X-Forwarded-For Spoofing

Advisories

Speedtest Tracker through 1.15.0 IP Allowlist Bypass via X-Forwarded-For Spoofing

severity: medium
date: 10/11/2026
Affecting: speedtest-tracker <= 1.15.0
CVE: CVE-2026-108736
CWE: CWE-348 Use of Less Trusted Source
CVSS: 6.3
CVSS V4 Vector: 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
References: https://hackmd.io/@haind03/speedtest-tracker-trust-proxies-allowlist-bypass
https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/bootstrap/app.php#L23-L41
https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/app/Http/Middleware/AllowedIpAddressesMiddleware.php#L16-L27
https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/app/Http/Middleware/PrometheusAllowedIpMiddleware.php#L22-L42
https://github.com/alexjustesen/speedtest-tracker
Credit: HaiND from the Post and Telecommunication Institute of Technology
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.

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