CVE-2026-58491Critical· 9.3▾ MidnightWarpgate 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 i…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 51.2 · likelihood 0.1 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-91165Low· 2.4Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux
CVE-2026-91167Medium· 6.0Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux
CVE-2026-91164Medium· 4.3Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux
CVE-2026-91166Medium· 5.7Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux
CVE-2026-63330High· 7.7Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux
CVE-2026-63329Medium· 4.9Warpgate is an open source SSH, HTTPS and MySQL bastion host for Linux