PT-2026-61693 · Glanceapp · Glance

George Chen · CVE-2026-63770 · Published 2026-07-20 · Updated 2026-07-20

NVD

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Exploit

Fix

Weakness Enumeration

CWE-348

Related Identifiers

CVE-2026-63770

Affected Products

Glance

References · 4

• 🔥 https://github.com/glanceapp/glance/issues/1031 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-63770 · Security Note
• https://github.com/glanceapp/glance/pull/1033 · Note
• https://vulncheck.com/advisories/glance-ip-spoofing-authentication-brute-force-protection-bypass · Note