CVE-2026-83535 Openstack-network-exporter: basic-auth uses plaintext password storage and non-constant-time comparison
An attacker can bypass authentication to access sensitive Open vSwitch and OVN metrics if TLS is misconfigured, leading to information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83535?
CVE-2026-83535 is a high-severity authentication bypass vulnerability in Red Hat OpenStack Platform 18.0, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-208
Which versions are affected by CVE-2026-83535?
How do I fix CVE-2026-83535?
No fix has been published for CVE-2026-83535 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-83535 being exploited?
There is no known exploitation of CVE-2026-83535 in the wild and no public exploit code.
Sources
Also known as GHSA-45q5-ghf8-56pr.