CVE-2026-58491 Warpgate - Stored XSS & Open Redirect

Warpgate < 0.25.5 contains a stored XSS and open redirect caused by unescaped attacker-controlled 'next' parameter in SSO endpoints, letting attackers execute scripts in authenticated sessions and redirect users, exploit requires victim interaction.

CVSS base score 9.3 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.46% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Stored XSS
Impact
Stored XSS, Open Redirect, Information Disclosure
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
Published
21 September 2026
Updated
15 October 2026
Weakness
CWE-79

Vendor fix

Update to version 0.25.5 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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