CVE-2026-77560 Tinyauth - Broken Access Control

Tinyauth < 5.1.2 contains a broken access control vulnerability caused by case-sensitive hostname comparison in forwarded hostnames, letting authenticated low-privilege users bypass per-app access controls with differently cased hostnames, exploit requires user authentication.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.61% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
21 September 2026
Updated
15 October 2026
Weakness
CWE-178

Vendor fix

Update to version 5.1.2 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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