Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.1 · CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS

• CVE-2026-32634: 0.30% estimated exploitation activity in the next 30 days; percentile 22.31 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary In Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global [passwords] default credential. An attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode. Details Dynamic server discovery keeps both a short name and a separate ip: The Zeroconf listener populates those fields directly from the service advertisement: However, the Central Browser connection logic ignores server['ip'] and instead uses the untrusted advertised…

Published by the source

16 Mar 2026, 16:36 UTC

Last modified by the source

13 Jul 2026, 07:26 UTC

Source last checked

26 Oct 2026, 13:37 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-vx5f-957p-qpvm

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-vx5f-957p-qpvm

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# Patch Next advisory brief: CVE-2026-32634

Advisory: Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers
IDs: CVE-2026-32634, GHSA-vx5f-957p-qpvm
Record: https://patchnext.com/advisories/cve-2026-32634 (revision 2, source checked 26 Oct 2026, 13:37 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: glances 4.5.2. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI glances: affected < 4.5.2; fixed in 4.5.2

## Suggested inspection (read-only)
- `python -m pip show glances`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on glances.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-vx5f-957p-qpvm (OSV record GHSA-vx5f-957p-qpvm lists affected ranges: PyPI glances >=0 <4.5.2 (fixed))
- Verified: https://github.com/advisories/GHSA-vx5f-957p-qpvm (GitHub-reviewed advisory GHSA-vx5f-957p-qpvm lists affected ranges: PyPI glances >=0 <4.5.2)

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