Metrics
Affected Vendors & Products
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Fri, 21 Aug 2026 13:00:00 +0000
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| First Time appeared |
Headroom Labs
Headroom Labs headroom |
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| Vendors & Products |
Headroom Labs
Headroom Labs headroom |
Fri, 21 Aug 2026 12:30:00 +0000
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| Metrics |
ssvc
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Fri, 21 Aug 2026 11:30:00 +0000
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| Description | Headroom's LLM proxy lets a client choose the upstream destination with the x-headroom-base-url request header. _resolve_openai_upstream_base in headroom/proxy/handlers/openai.py accepts the header value, requires only that it parse with an http or https scheme and a hostname, and returns it for use as the upstream base; _select_passthrough_base_url in headroom/providers/proxy_routes.py reads the same header for the passthrough routes. No check rejects loopback, link-local, or RFC 1918 destinations, and because the component is a proxy the upstream response is returned to the caller, so the request reaches internal services and cloud metadata addresses and their responses are disclosed. The Authorization header accompanying the request is forwarded unchanged to the caller-designated host. The pip console script binds 127.0.0.1 by default, but the reference docker-compose.yml ships --host 0.0.0.0 with published ports and no required HEADROOM_PROXY_TOKEN, which the server itself warns about at startup, so a deployment following the shipped compose exposes the affected data-plane routes to the network without authentication. | |
| Title | Headroom Proxy Sends Upstream Requests to a Client-Supplied Base URL Without Address Validation | |
| Weaknesses | CWE-918 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-21T11:44:34.968Z
Reserved: 2026-08-21T11:09:25.553Z
Link: CVE-2026-77775
Updated: 2026-08-21T11:41:23.790Z
Status : Received
Published: 2026-08-21T12:16:36.813
Modified: 2026-08-21T12:16:36.813
Link: CVE-2026-77775
No data.
OpenCVE Enrichment
Updated: 2026-08-21T13:15:05Z