CVE-2026-63770

Glance through 0.8.5 contains an IP address spoofing vulnerability in the authentication handler that allows unauthenticated attackers to bypass brute-force lockout protections by supplying arbitrary values in the X-Forwarded-For request header when the server proxied option is enabled. Attackers can manipulate the leftmost value of the X-Forwarded-For header to make each login attempt appear to originate from a distinct IP address, preventing the per-IP failed-login counter from reaching the lockout threshold and enabling unlimited credential guessing against the authentication endpoint.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/glanceapp/glance/issues/1031
https://github.com/glanceapp/glance/pull/1033
https://www.vulncheck.com/advisories/glance-ip-spoofing-authentication-brute-force-protection-bypass

Configurations

No configuration.

History

20 Jul 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-20 19:17

Updated : 2026-07-20 19:17

NVD link : CVE-2026-63770

Mitre link : CVE-2026-63770

CVE.ORG link : CVE-2026-63770

JSON object : View

Products Affected

No product.

CWE

CWE-348

Use of Less Trusted Source

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