CVE-2026-91166
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
Summary
Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. From 0.25.0 until 0.27.6, the browser SSH path in warpgate-web-ssh/src/manager.rs handles RCEvent::HostKeyUnknown without the presenting hop identity and instead passes ssh_options.host and ssh_options.port for the final target to KnownHosts::trust. In Prompt and AutoAccept modes, a jump host key can therefore be stored for the target address. A machine later presenting the jump host key at the target address can be accepted as the target, allowing interception of user traffic and a newly issued certificate when certificate authentication is used. The native SSH path is unaffected because it tracks each hop separately. This issue is fixed in version 0.27.6.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| warp-tech | warpgate | >= 0.25.0, < 0.27.6 | affected |
Weaknesses
- CWE-297: CWE-297: Improper Validation of Certificate with Host Mismatch
- CWE-923: CWE-923: Improper Restriction of Communication Channel to Intended Endpoints
References
- https://github.com/warp-tech/warpgate/security/advisories/GHSA-w9jj-vpw3-5r8f
- https://github.com/warp-tech/warpgate/commit/fb66ff74f979c22054f4d348cc0d9065cc67e5d3
- https://github.com/warp-tech/warpgate/releases/tag/v0.27.6
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