IP allowlist bypass in Speedtest Tracker via X-Forwarded-For spoofing
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
Speedtest Tracker through 1.15.0 contains an IP allowlist bypass. Because bootstrap/app.php trusts every peer as a proxy, an unauthenticated remote attacker can spoof X-Forwarded-For headers to evade the ALLOWED_IPS and Prometheus allowlists (CWE-348). An attacker can supply an allowlisted address to read /prometheus metrics and reach protected web and API endpoints.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| alexjustesen | speedtest-tracker | up to 1.15.0 | — | No fix listed | CNA |
- speedtest-tracker Vendoralexjustesen Affected up to 1.15.0 Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Speedtest Tracker.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-11 Threatist record created from CVE-2026-108736
- 2026-10-11 Alias added: GHSA-5mh8-m8gg-2f9w
- 2026-10-12 Priority changed: MEDIUM → LOW
- 2026-10-13 CISA SSVC decision points changed
References
Other 4
- 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
Sources
- CVE-2026-108736 · CVE Program
- CVE-2026-108736 · NVD
- FIRST EPSS
- GHSA-5mh8-m8gg-2f9w · GitHub Advisory Database · CC BY 4.0
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