Warpgate: Kubernetes authorization correlation can be reused by a recreated same-name account
CVSS score
6.8
EPSS probability
—
Risk score
0.7
Published
3 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
The Kubernetes request correlator in Warpgate keys authorized targets by username, target name, and client IP instead of the immutable user UUID. This allows a recreated low-privilege account with the same username to reuse a predecessor's still-live correlation entry.
This vulnerability allows an unauthorized account to bypass fresh target authorization checks, causing Warpgate to proxy requests with Kubernetes target credentials that the replacement account is not permitted to use, thereby exposing cluster resources or allowing unauthorized mutations.
What should be done?
- Update the software or follow vendor advisory guidance
- Upgrade Warpgate to the latest secure release
Chain of evidence and sources
Warpgate içinde 0.21.0 ile 0.29.0 sürümleri arasında Kubernetes istek ilişkilendiricisi kullanıcı adı, hedef adı ve istemci IP adresi üzerinden anahtarlama yapmaktadır.
KubernetesSessionHandle::close fonksiyonu girdiyi silmediği için silinen bir hesabın yerine aynı adla açılan hesap eski ilişkilendirme kaydını yeniden kullanabilir.
Yeniden kullanılan girdi, taze bir hedef yetkilendirme kontrolünü atlayarak yetkisiz isteklerin proxy edilmesine yol açabilir.
Show the technical text from the sources
Warpgate is an open source SSH, HTTPS, and MySQL bastion host for Linux. From 0.21.0 until 0.29.0, the Kubernetes request correlator in warpgate-protocol-kubernetes/src/correlator.rs keys an authorized AdmittedTarget by username, target_name, and client IP rather than by the immutable user UUID, while KubernetesSessionHandle::close does not evict the entry. If an account is deleted and a different low-privilege account is created with the same username, the replacement account can successfully authenticate as that recreated username and reuse the predecessor's still-live correlation entry when requesting the same target from the same client IP before kubernetes.session_max_age expires. Current-request authentication still occurs, but the reused entry bypasses a fresh target authorization check and can cause Warpgate to proxy requests with Kubernetes target credentials that the replacement account is not authorized to use, exposing cluster resources or permitting unauthorized mutations. This issue is fixed in version 0.29.0.
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE: CWE-639
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-91168 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | warp-tech | warpgate | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 6.8 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N | CVE CNA |
| 6.8 | CVSS V31 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-91168 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-91168 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
CVSS Vector Radar Chart
6.8 / 10Vulnerability Scoring Details
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:NYama durumu bilinmiyor
Weakness Type (CWE & CAPEC)
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