CVE-2026-63770

HIGH 7.5

Glance 0.8.5 IP Spoofing Authentication Brute-Force Protection Bypass

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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

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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

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

George Chen