{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-83536", "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "state": "PUBLISHED", "assignerShortName": "redhat", "dateReserved": "2026-08-31T16:53:08.479Z", "datePublished": "2026-10-12T18:50:23.855Z", "dateUpdated": "2026-10-12T18:50:23.855Z"}, "containers": {"cna": {"title": "Openstack-network-exporter: http.server has no readheadertimeout / readtimeout (slowloris)", "metrics": [{"other": {"content": {"value": "Moderate", "namespace": "https://access.redhat.com/security/updates/classification/"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "format": "CVSS"}], "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat OpenStack Platform 18.0", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhoso-operators/openstack-network-exporter-rhel9", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:openstack:18.0"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-83536", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526401", "name": "RHBZ#2526401", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-10-12T18:28:52.398Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-400", "description": "Uncontrolled Resource Consumption", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-400: Uncontrolled Resource Consumption", "workarounds": [{"lang": "en", "value": "Restrict network access to the `openstack-network-exporter` service. Configure firewall rules to limit incoming connections to port 1981 (the default port for the exporter) only from trusted hosts or networks that require access for Prometheus scraping. This will reduce the attack surface by preventing unauthenticated adjacent attackers from reaching the service. Applying firewall rules may require restarting network services or the firewall daemon to take effect."}], "timeline": [{"lang": "en", "time": "2026-08-31T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-10-12T18:28:52.398Z", "value": "Made public."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-10-12T18:50:23.855Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:openstack:18.0"], "defaultStatus": "affected", "packageName": "rhoso-operators/openstack-network-exporter-rhel9", "product": "Red Hat OpenStack Platform 18.0", "vendor": "Red Hat"}], "source": "secalert@redhat.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-83536", "lastModified": "2026-10-12T19:16:39.997", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Primary"}]}, "published": "2026-10-12T19:16:39.997", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-83536"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2526401"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-400"}], "source": "secalert@redhat.com", "type": "Primary"}]}

{}

{"created": "2026-10-12T20:45:17.866165+00:00", "updated": "2026-10-12T20:45:17.866170+00:00", "vendors": []}