Is CVE-2026-63770 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-63770 being exploited in the wild.

How severe is CVE-2026-63770?

High severity, with a CVSS score of 7.5, published 20 July 2026.

Is there a fix for CVE-2026-63770?

A patch was published on 2026-07-02: Pull request submitted to fix the vulnerability Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-63770 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-63770?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-63770: Glance brute-force protection bypass via X-Forwarded-For spoofing

CVE-2026-63770 · Severity: high · CVSS 7.5 · Published 2026-07-20

Glance, a self-hosted dashboard application, contains a security flaw that allows attackers to bypass password protection limits. When the application is used behind a standard web proxy, an attacker can trick the system into thinking each login attempt is coming from a different person. This allows them to make unlimited password guesses without being locked out, potentially leading to unauthorized access to sensitive dashboard data and internal service information.

Quick answers

Is CVE-2026-63770 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-63770 being exploited in the wild.
How severe is CVE-2026-63770?: High severity, with a CVSS score of 7.5, published 20 July 2026.
Which products and versions are affected?: glanceapp Glance <= 0.8.5.
Is there a fix for CVE-2026-63770?: A patch was published on 2026-07-02: Pull request submitted to fix the vulnerability Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-63770 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-63770?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An IP address spoofing vulnerability exists in the Glance authentication handler (internal/glance/glance.go) when the 'proxied' configuration option is enabled. The application's addressOfRequest function incorrectly trusts the leftmost value of the X-Forwarded-For HTTP header, which is client-controlled. By rotating this value in each request, an unauthenticated remote attacker can prevent the per-IP failed-login counter from reaching its lockout threshold. This enables unlimited brute-force credential guessing against the /api/authenticate endpoint. A fix has been proposed to use the rightmost (trusted proxy-appended) IP address instead.

Affected products

glanceapp Glance <= 0.8.5

Timeline

2026-05-22: disclosed: Private disclosure to vendor
2026-06-30: other: Public issue opened on GitHub
2026-07-02: patched: Pull request submitted to fix the vulnerability
2026-07-20: advisory: CVE published and NVD record created

References

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