Vulnerability · Published Apr 22, 2026 · Assigned by OX
CVE-2026-33611Insufficient validation of HTTPS and SVCB records
Medium 6.5
In plain English
A medium-severity integer overflow 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 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 63.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An operator allowed to use the REST API can cause the Authoritative server to produce invalid HTTPS or SVCB record data, which can in turn cause LMDB database corruption, if using the LMDB backend.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | pdns | 5.0.4-r0 | ALPINE-CVE-2026-33611 |
| Alpine:v3.24 | pdns | 5.0.4-r0 | ALPINE-CVE-2026-33611 |
| Debian:12 | pdns | no fix listed | DEBIAN-CVE-2026-33611 |
| Debian:13 | pdns | 4.9.14-0+deb13u1 | DEBIAN-CVE-2026-33611 |
| Debian:14 | pdns | 5.0.4-1 | DEBIAN-CVE-2026-33611 |
| Ubuntu:24.04:LTS | pdns | no fix listed | UBUNTU-CVE-2026-33611 |
| Ubuntu:25.10 | pdns | no fix listed | UBUNTU-CVE-2026-33611 |
| Ubuntu:26.04:LTS | pdns | no fix listed | UBUNTU-CVE-2026-33611 |
| Ubuntu:26.10 | pdns | no fix listed | UBUNTU-CVE-2026-33611 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PowerDNS | Authoritative | 5.0.0 – before 5.0.44.9.0 – before 4.9.14 |
Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H