CVE-2026-63770
Glance 0.8.5 IP Spoofing Authentication Brute-Force Protection Bypass
CVSS Score
7.5
EPSS Score
0.2%
EPSS Percentile
10th
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.
| CWE | CWE-348 |
| Vendor | glanceapp |
| Product | glance |
| Published | Jul 20, 2026 |
| Last Updated | Aug 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
glanceapp / glance
0 ≤ 0.8.5
References
github.com: https://github.com/glanceapp/glance/issues/1031 github.com: https://github.com/glanceapp/glance/pull/1033 github.com: https://github.com/glanceapp/glance/commit/3f20e8d9d0b1983892632649f35fd00c7b4ea8b6 vulncheck.com: https://www.vulncheck.com/advisories/glance-ip-spoofing-authentication-brute-force-protection-bypass
Credits
George Chen