Low severity · published Oct 11, 2026
CVE-2026-108736
Speedtest Tracker through 1.15.0 IP Allowlist Bypass via X-Forwarded-For Spoofing
3.7
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SP
speedtest-tracker · alexjustesen
through 1.15.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-108736
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-108736
third-party-advisory
https://hackmd.io/@haind03/speedtest-tracker-trust-proxies-allowlist-bypass
technical-description
https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/bootstrap/app.php#L23-L41
technical-description
https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/app/Http/Middleware/AllowedIpAddressesMiddleware.php#L16-L27
technical-description
https://github.com/alexjustesen/speedtest-tracker/blob/fce6eb36181ed70b5b0763c391a50b806d7e3da7/app/Http/Middleware/PrometheusAllowedIpMiddleware.php#L22-L42
product
https://github.com/alexjustesen/speedtest-tracker
third-party-advisory
https://www.vulncheck.com/advisories/speedtest-tracker-through-1.15.0-ip-allowlist-bypass-via-x-forwarded-for-spoofing