Vulnerability · Published Mar 31, 2026 · Assigned by OX
CVE-2026-0397Information disclosure via CORS misconfiguration
Low 3.1
In plain English
A low-severity security flaw in DNSdist from PowerDNS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
When the internal webserver is enabled (default is disabled), an attacker might be able to trick an administrator logged to the dashboard into visiting a malicious website and extract information about the running configuration from the dashboard. The root cause of the issue is a misconfiguration of the Cross-Origin Resource Sharing (CORS) policy.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | dnsdist | 2.0.4-r0 | ALPINE-CVE-2026-0397 |
| Alpine:v3.24 | dnsdist | 2.0.4-r0 | ALPINE-CVE-2026-0397 |
| Debian:12 | dnsdist | no fix listed | DEBIAN-CVE-2026-0397 |
| Debian:13 | dnsdist | 1.9.14-0+deb13u1 | DEBIAN-CVE-2026-0397 |
| Debian:14 | dnsdist | 2.0.3-1 | DEBIAN-CVE-2026-0397 |
| Ubuntu:25.10 | dnsdist | no fix listed | UBUNTU-CVE-2026-0397 |
| Ubuntu:26.04:LTS | dnsdist | no fix listed | UBUNTU-CVE-2026-0397 |
| Ubuntu:26.10 | dnsdist | no fix listed | UBUNTU-CVE-2026-0397 |
Affected products (as reported)
Weakness: CWE-942 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N