CVE-2026-63329: warp-tech warpgate · Improper Encoding or Escaping of Output
Affects warp-tech warpgateSource CVE Database V5
Not known to be exploited · CVSS 4.9 Medium : upgrade to 0.25.6 when convenient.
Data as of 5 Nov 2026, 00:01 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 0.25.6
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 21 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Upgrade warpgate and warp-tech/warpgate to 0.25.6.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| warp-techwarpgate | Affected
| Fixed in
|
GitHubwarp-tech/warpgatepkg:github/warp-tech/warpgateOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade warpgate to version 0.25.6 or later, where this vulnerability is fixed. No other mitigation is required as the official fix addresses the issue.
Description
CVE-2026-63329 is a medium severity vulnerability in warp-tech warpgate, an open source SSH, HTTPS, and MySQL bastion host for Linux. Versions prior to 0.25.6 improperly forward client-supplied x-warpgate-username headers, allowing an authenticated attacker to potentially impersonate another user if the backend trusts the first header value. The vulnerability also involves acceptance of the reserved x-warpgate-authentication-type header without exclusion. This issue is fixed in version 0.25.6.