Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. Prior to 0.25.6, copy_server_request in warpgate-protocol-http/src/proxy.rs forwards a client-supplied x-warpgate-username header before inject_own_headers appends the authenticated username. Because the request builder preserves repeated values, a proxied backend that trusts the first x-warpgate-username value can authorize an authenticated attacker as another user. The same forwarding policy also accepts the reserved x-warpgate-authentication-type header, and warpgate-common/src/http_headers.rs does not exclude either reserved identity header. This issue is fixed in version 0.25.6.
CVE-2026-63329
MEDIUMPre-NVD 4.94.9—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 4.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 79% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.9Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 4.9
- EG Score
- 4.9(medium)
- EG Risk
- 22(Track)EG Risk 22/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity49% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 21%
- KEV
- Not listed
Published
September 21, 2026
Last Modified
September 24, 2026
Advisory Details (3)
Auto-updated Sep 21, 2026🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available
v0.25.6
Patch available: warp-tech/warpgate v0.25.6
https://github.com/warp-tech/warpgate/releases/tag/v0.25.6github_commit
commit c3748d758520 (warp-tech/warpgate)
Fix landed in warp-tech/warpgate commit c3748d758520 — awaiting tagged release
https://github.com/warp-tech/warpgate/commit/c3748d7585209781b2d3a39ac9941b91d11d9b77github Patch Available🟡 PoC Available
x-warpgate-username Header Not Stripped from Client Requests Enables Identity Spoofing to WebSocket Backend Targets · Advisory · warp-tech/warpgate · GitHub
https://github.com/warp-tech/warpgate/security/advisories/GHSA-862h-v6cc-9757Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-09-24 21:37 UTCEG score recompute
- 2026-09-24 12:54 UTCEG score recompute
- 2026-09-23 17:54 UTCEPSS rescore
- 2026-09-22 16:22 UTCEG score recompute
- 2026-09-22 15:45 UTCEG score recompute
- 2026-09-21 19:28 UTCEG score recompute
- 2026-09-21 18:55 UTCEG score recompute
- 2026-09-21 18:55 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-63329?
CVE-2026-63329 is a medium vulnerability published on September 21, 2026. Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. Prior to 0.25.6, copyserverrequest in warpgate-protocol-http/src/proxy.rs forwards a client-supplied x-warpgate-username header before injectownheaders appends the authenticated username. Because the request builder preserves…
When was CVE-2026-63329 disclosed?
CVE-2026-63329 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63329 actively exploited?
CVE-2026-63329 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.0% of all scored CVEs.
What is the CVSS score of CVE-2026-63329?
CVE-2026-63329 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2026-63329?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63329, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-63329
Is Your Infrastructure Affected by CVE-2026-63329?
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