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Advisory record · GHSA-pqg7-v6wh-3pfp

TsDProxy: X-Forwarded-For header injection allows IP spoofing in proxied requests to backend services

CVSS 8.5 High

Published by the GitHub Advisory Database at 14 Jul 2026, 19:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/almeidapaulopt/tsdproxyGoall versionsNo fixed version yet
Identifiers
GHSA-pqg7-v6wh-3pfp · GO-2026-5982
Weakness (CWE)
CWE-74
Tags
Published
14 Jul 2026
Updated
21 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of github.com/almeidapaulopt/tsdproxy are affected, and no fixed version is listed. The proxy does not remove incoming X-Forwarded-For or X-Real-IP headers before forwarding requests to backend services, so an authenticated Tailscale user can set these headers to arbitrary values. A user with regular access could then bypass IP-based restrictions, rate limits, or audit logging on backends that trust those headers. No workaround is given in the source.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.5 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:58 UTC First seen by agentprime
  2. 31 Oct 2026, 14:58 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.