Description
A flaw was found in openstack-network-exporter. When an operator configures user authentication but omits or misconfigures Transport Layer Security (TLS), the basic authentication mechanism is silently bypassed. This fail-open design allows an adjacent network attacker to access sensitive Open vSwitch (OVS) and Open Virtual Network (OVN) dataplane metrics without credentials. Consequently, an attacker can enumerate bridge names, port counters, OVN controller state, and host topology, leading to information disclosure.
Published: 2026-10-12
Score: 7.4 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Workaround

To mitigate this issue, restrict access to the `openstack-network-exporter` metrics endpoint (TCP port 1981) to trusted networks or localhost. This can be achieved by configuring firewall rules to block external access to port 1981 or by explicitly setting the `HttpListen` configuration to `127.0.0.1:1981` to bind only to the localhost interface. If the `HttpListen` configuration is changed, the `openstack-network-exporter` service may require a restart or reload for the changes to take effect.

Tracking

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Advisories

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History

Tue, 13 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 13 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Mon, 12 Oct 2026 19:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in openstack-network-exporter. When an operator configures user authentication but omits or misconfigures Transport Layer Security (TLS), the basic authentication mechanism is silently bypassed. This fail-open design allows an adjacent network attacker to access sensitive Open vSwitch (OVS) and Open Virtual Network (OVN) dataplane metrics without credentials. Consequently, an attacker can enumerate bridge names, port counters, OVN controller state, and host topology, leading to information disclosure.
Title Openstack-network-exporter: basic-auth uses plaintext password storage and non-constant-time comparison
First Time appeared Redhat
Redhat openstack
Weaknesses CWE-208
CPEs cpe:/a:redhat:openstack:18.0
Vendors & Products Redhat
Redhat openstack
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}


Subscriptions

Redhat Openstack
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-10-13T16:09:30.111Z

Reserved: 2026-08-31T16:53:08.479Z

Link: CVE-2026-83535

cve-icon Vulnrichment

Updated: 2026-10-13T16:09:25.799Z

cve-icon NVD

Status : Received

Published: 2026-10-12T19:16:39.850

Modified: 2026-10-13T17:17:47.333

Link: CVE-2026-83535

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-12T18:30:36Z

Links: CVE-2026-83535 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T20:45:17Z

Weaknesses
  • CWE-208

    Observable Timing Discrepancy