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TI-2026-42094 Aliases CVE-2026-58491

Warpgate: Reflected XSS in SSO return endpoint via attacker-controlled next parameter

Priority MEDIUM 42CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux. Prior to 0.25.5, the /@warpgate/api/sso/providers/:name/start endpoint stores an attacker-controlled next parameter that the POST /@warpgate/api/sso/return handler inserts without HTML escaping into the response generated by warpgate-protocol-http/src/api/sso_provider_list.rs. A victim who follows a crafted link and completes SSO can cause markup and JavaScript to execute in the authenticated Warpgate origin, allowing access to session data and actions through user APIs, and through administrator APIs only when the victim is an administrator. The GET /@warpgate/api/sso/return path also uses the same unvalidated value as a redirect destination, enabling an open redirect. This issue is fixed in version 0.25.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00458 39th percentileScored 2026-11-07
Fix Fixed warpgate (warp-tech): 0.25.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
warp-techwarpgatebefore 0.25.50.25.5Patch availableCNA
  • warpgate Vendorwarp-tech Affected before 0.25.5 Fixed in 0.25.5 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:warpgate_project:warpgate:*:*:*:*:*:*:*:*——warp-tech
  • cpe:2.3:a:warpgate_project:warpgate:*:*:*:*:*:*:*:* Versions — — ·warp-tech

Remediation

  • Fix · CNA warpgate (warp-tech) Fixed in 0.25.5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-58491

References

Other 3

  • TI-2023-18898 User login confusion with SSO in warpgate CVSS 3.1HIGH 8.8
  • TI-2026-30510 Russh: Pre-auth DoS via unbounded allocation in keyboard-interactive auth CVSS 3.1HIGH 7.5
  • TI-2024-29059 Russh has an OOM Denial of Service due to allocation of untrusted amount CVSS 3.1HIGH 7.5
  • TI-2026-45163 Improper authorization in warp-tech warpgate CVSS 3.1HIGH 7.7
  • TI-2026-32313 Warpgate: SSO CSRF -- State Token Not Validated on Return CVSS 3.1MEDIUM 6.5
  • TI-2025-34558 Russh is missing an overflow check during channel windows adjust CVSS 3.1MEDIUM 6.5
See all 16 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences