Vulnerability · Published Apr 22, 2026 · Assigned by OX
CVE-2026-33610Possible file descriptor exhaustion in forward-dnsupdate
Medium 5.9
In plain English
A medium-severity uncontrolled resource consumption in Authoritative 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 34% 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 66.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | pdns | 5.0.4-r0 | ALPINE-CVE-2026-33610 |
| Alpine:v3.24 | pdns | 5.0.4-r0 | ALPINE-CVE-2026-33610 |
| Debian:12 | pdns | no fix listed | DEBIAN-CVE-2026-33610 |
| Debian:13 | pdns | 4.9.14-0+deb13u1 | DEBIAN-CVE-2026-33610 |
| Debian:14 | pdns | 5.0.4-1 | DEBIAN-CVE-2026-33610 |
| Ubuntu:24.04:LTS | pdns | no fix listed | UBUNTU-CVE-2026-33610 |
| Ubuntu:25.10 | pdns | no fix listed | UBUNTU-CVE-2026-33610 |
| Ubuntu:26.04:LTS | pdns | no fix listed | UBUNTU-CVE-2026-33610 |
| Ubuntu:26.10 | pdns | no fix listed | UBUNTU-CVE-2026-33610 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PowerDNS | Authoritative | 5.0.0 – before 5.0.44.9.0 – before 4.9.14 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H