IP Address Spoofing Vulnerability in Glance by Glance App
CVE-2026-63770

8.2HIGH

Key Information:

Vendor

Glanceapp

Status
Glance
Vendor
CVE Published:
20 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-63770?

The Glance application version 0.8.5 is impacted by an IP address spoofing vulnerability within its authentication handler. This flaw allows unauthenticated attackers to evade brute-force lockout protections. By manipulating the X-Forwarded-For request header, attackers can present arbitrary values, making multiple login attempts appear to originate from different IP addresses. This circumvention results in the failed-login counter not reaching its threshold, thus permitting unlimited credential guessing attempts on the authentication endpoint.

Affected Version(s)

glance 0 <= 0.8.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-63770 - Proof of Concept

References

https://github.com/glanceapp/glance/issues/1031
technical-descriptionexploit
https://github.com/glanceapp/glance/pull/1033
issue-tracking
https://www.vulncheck.com/advisories/glance-ip-spoofing-a...
third-party-advisory

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.