Is CVE-2026-91166 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-91166 being exploited in the wild.

How severe is CVE-2026-91166?

Medium severity, with a CVSS score of 5.7, published 21 September 2026.

Which products and versions are affected?

Warp Tech Warpgate 0.25.0 to 0.27.5.

Is there a fix for CVE-2026-91166?

A patch was published on 2026-08-15: Fix committed to main branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-91166 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-91166?

Check whether you run Warp Tech Warpgate at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-91166: Warpgate SSH host key confusion in web-based terminal

CVE-2026-91166 · Severity: medium · CVSS 5.7 · Published 2026-09-21

Warpgate is an open-source bastion host for managing SSH, HTTPS, and MySQL connections. A flaw in the web-based SSH client causes jump host keys to be incorrectly mapped to target server addresses. An attacker with access to a jump host's private key could intercept user traffic to target servers and potentially capture SSH certificates, compromising the security of multi-hop SSH connections.

Technologies: Warp Tech Warpgate. Vendors: Warp Tech.

Quick answers

Is CVE-2026-91166 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-91166 being exploited in the wild.
How severe is CVE-2026-91166?: Medium severity, with a CVSS score of 5.7, published 21 September 2026.
Which products and versions are affected?: Warp Tech Warpgate 0.25.0 to 0.27.5.
Is there a fix for CVE-2026-91166?: A patch was published on 2026-08-15: Fix committed to main branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-91166 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-91166?: Check whether you run Warp Tech Warpgate at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The browser SSH implementation in warpgate-web-ssh/src/manager.rs fails to track hop identity when handling RCEvent::HostKeyUnknown, storing the jump host key against the target's IP address and port instead. In Prompt and AutoAccept modes, this allows a machine presenting the jump host's key at the target address to be accepted as legitimate. The native SSH client is unaffected because it correctly tracks each hop separately. The fix adds hop identity parameters to prevent key confusion.

Affected products

warp-tech Warpgate 0.25.0 to 0.27.5

Timeline

2026-09-21: disclosed: CVE-2026-91166 published
2026-08-15: patched: Fix committed to main branch
2026-08-14: patched: Version 0.27.6 released

References

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