CVE-2026-63770
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| glanceapp | glance | 0 <= 0.8.5 | affected |
Weaknesses
- CWE-348: Use of Less Trusted Source
References
- 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
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