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CVE-2026-83535— Openstack-network-exporter: basic-auth uses plaintext password storage and non-constant-time comparison

Quick assessment

Affected
Red Hat Red Hat OpenStack Platform 18.0
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 openstack-network-exporter 中发现了一个漏洞。当操作员配置了用户身份验证但遗漏或错误配置传输层安全（TLS）时，基本身份验证机制会被静默绕过。这种“失败开放”的设计使得相邻网络攻击者能够在不提供凭据的情况下访问敏感的 Open vSwitch（OVS）和 Open Virtual Network（OVN）数据平面指标。因此，攻击者可以枚举网桥名称、端口计数器、OVN 控制器状态以及主机拓扑结构，从而导致信息泄露。

CVSS 7.4 · High EPSS 0.28% · P19

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat OpenStack Platform 18.0 any affected
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I. Basic Information for CVE-2026-83535

Vulnerability Information
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Vulnerability Title
Openstack-network-exporter: basic-auth uses plaintext password storage and non-constant-time comparison
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过时间差异性导致的信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat OpenStack Platform 18.0 - cpe:/a:redhat:openstack:18.0

II. Public POCs for CVE-2026-83535

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III. Intelligence Information for CVE-2026-83535

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Vendor Advisories for CVE-2026-83535 (2)

Same Patch Batch · Red Hat · 2026-10-12 · 12 CVEs total

CVE-2026-87744 9.1 CRITICAL Io.quarkus:quarkus-hibernate-orm-rest-data-panache: missing authorization in quarkus rest
CVE-2026-108094 7.8 HIGH Mutter: mutter: client-triggered use-after-free in wayland color-management icc image desc
CVE-2026-75888 7.7 HIGH Openshift/console: openshift/console: authenticated ssrf via helm chart url fetch
CVE-2026-109082 6.8 MEDIUM Keycloak-services: keycloak-services: ciba confidential-only contract not enforced for pub
CVE-2026-94451 6.5 MEDIUM Quarkus-hibernate-orm-rest-data-panache: quarkus-hibernate-orm-rest-data-panache: informat
CVE-2026-107193 6.5 MEDIUM Foreman: api filter lookup ignores a search-limited filter permission
CVE-2026-85471 6.4 MEDIUM Quay: quay: webhook notification ssrf -- hostname-string blocklist trivially bypassable
CVE-2026-109194 6.4 MEDIUM Quay: build trigger uuid idor in quay api
CVE-2026-107203 5.4 MEDIUM Foreman: domain and subnet interface api skips host search filters
CVE-2026-83536 5.3 MEDIUM Openstack-network-exporter: http.server has no readheadertimeout / readtimeout (slowloris)
CVE-2026-109195 3.1 LOW Quay: repository auto-prune policy uuid idor in quay api

IV. Related Vulnerabilities

Same product: Red Hat OpenStack Platform 18.0
Same vendor: Red Hat
Same weakness: CWE-208

V. Comments for CVE-2026-83535

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