CVE-2026-83536
Openstack-network-exporter: http.server has no readheadertimeout / readtimeout (slowloris)
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 12, 2026
- Updated
- Oct 13, 2026
- Reserved
- Aug 31, 2026
Description
A flaw was found in openstack-network-exporter. The HTTP server within the component is configured without essential timeout settings, such as ReadHeaderTimeout. This vulnerability allows an unauthenticated, remote attacker to initiate multiple slow HTTP header connections. By trickling header bytes, the attacker can exhaust server resources, specifically file descriptors, leading to a Denial of Service (DoS) that prevents legitimate Prometheus metric scraping and alerting.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | redhat |
Weaknesses
- CWE-400 Uncontrolled Resource Consumption
Affected Products
| Product | Versions |
|---|---|
Red Hat OpenStack Platform 18.0Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-83536vdb-entry
- RHBZ#2526401issue-tracking
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