Vulnerability · Published Jun 25, 2026 · Assigned by OX
CVE-2026-52690Spoofed answers can mark an authoritative non-EDNS capable
Medium 5.9
In plain English
A medium-severity authentication bypass by spoofing in Recursor from PowerDNS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.4%top 63.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | pdns-recursor | 5.4.3-r0 | ALPINE-CVE-2026-52690 |
| Debian:12 | pdns-recursor | no fix listed | DEBIAN-CVE-2026-52690 |
| Debian:13 | pdns-recursor | 5.2.11-0+deb13u1 | DEBIAN-CVE-2026-52690 |
| Debian:14 | pdns-recursor | 5.4.3-1 | DEBIAN-CVE-2026-52690 |
| Ubuntu:24.04:LTS | pdns-recursor | no fix listed | UBUNTU-CVE-2026-52690 |
| Ubuntu:25.10 | pdns-recursor | no fix listed | UBUNTU-CVE-2026-52690 |
| Ubuntu:26.04:LTS | pdns-recursor | no fix listed | UBUNTU-CVE-2026-52690 |
| Ubuntu:26.10 | pdns-recursor | no fix listed | UBUNTU-CVE-2026-52690 |
Affected products (as reported)
Weakness: CWE-290 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H