DNS Rebinding Affecting copilot-api package, versions *
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-COPILOTAPI-16321518
- published29 Apr 2026
- disclosed23 Apr 2026
- creditYu_Bao
Introduced: 23 Apr 2026
NewCVE-2026-6874 (opens in a new tab)How to fix?
There is no fixed version for copilot-api.
Overview
copilot-api is a Turn GitHub Copilot into OpenAI/Anthropic API compatible server. Usable with Claude Code!
Affected versions of this package are vulnerable to DNS Rebinding in ericc-ch copilot-api up to 0.7.0. This impacts an unknown function of the file /token of the component Header Handler. Executing a manipulation of the argument Host can lead to reliance on reverse dns resolution. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.