CVE-2026-33611

Insufficient validation of HTTPS and SVCB records

6.5 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: High

Exploit likelihood

0.42%Up 0.4 points since Apr 23, 2026

What each source reports

CVE List Score used 6.5

Insufficient validation of HTTPS and SVCB records

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.

Record: CVE-2026-33611
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Weakness: CWE-190
Updated: 2026-11-02

EUVDEUVD-2026-24951 6.5

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.

Record: EUVD-2026-24951
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-vqqc-7rwf-3j3j 6.5

An operator allowed to use the REST API can cause the Authoritative server to produce invalid...

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.

Record: GHSA-vqqc-7rwf-3j3j
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Weakness: CWE-190
Updated: 2026-11-02

NVD 6.5

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.

Record: CVE-2026-33611
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-190
Updated: 2026-11-02

OSVALPINE-CVE-2026-33611 4.9

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.

Record: ALPINE-CVE-2026-33611
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSV 6.5

Insufficient validation of HTTPS and SVCB records

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.

Record: CVE-2026-33611
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-33611 4.9

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.

Record: DEBIAN-CVE-2026-33611
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-33611 6.5

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.

Record: UBUNTU-CVE-2026-33611
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

powerdns authoritative

Affected packages

Affected packages
Package	Affected	Fixed
`pdns` Alpine:v3.23	before 5.0.4-r0	5.0.4-r0
`pdns` Alpine:v3.24	before 5.0.4-r0	5.0.4-r0
`pdns` Debian:12	All versions, plus listed versions 4.7.3-24.8.0-14.8.0-24.8.1-14.8.1-2 Show 37 moreShow less 4.8.2-14.8.2-24.8.3-14.8.3-24.8.3-34.8.3-44.9.0-14.9.0-24.9.1-14.9.1-24.9.1-34.9.2-14.9.2-24.9.3-14.9.3-24.9.3-34.9.4-14.9.4-24.9.7-15.0.0-15.0.0-25.0.1-15.0.2-15.0.3-15.0.4-15.0.5-15.0.5-25.0.5-35.0.5-45.1.0-15.1.1-15.1.1-25.1.1-35.1.2-15.1.3-15.1.4-15.1.5-1	None known
`pdns` Debian:13	before 4.9.14-0+deb13u1, plus listed versions 4.9.7-1	4.9.14-0+deb13u1
`pdns` Debian:14	before 5.0.4-1, plus listed versions 4.9.7-15.0.0-15.0.0-25.0.1-15.0.2-15.0.3-1	5.0.4-1
`pdns` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 3.4.5-1build23.4.6-23.4.6-33.4.7-13.4.7-2 Show 5 moreShow less 4.0.0~alpha1-14.0.0~alpha2-24.0.0~alpha2-34.0.0~alpha2-3build14.0.0~alpha2-3ubuntu0.1~esm1	None known
`pdns` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 4.0.4-24.0.4-2build14.0.5-14.1.0-14.1.0-24.1.0-2build14.1.1-14.1.1-1ubuntu0.1~esm1	None known
`pdns` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 4.1.6-3build14.2.0-14.2.1-14.2.1-1build14.2.1-1build24.2.1-1ubuntu0.1~esm1	None known
`pdns` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 4.4.1-1build14.4.1-34.4.1-44.5.2-1build14.5.3-14.5.3-1ubuntu0.1~esm1	None known
`pdns` Ubuntu:24.04:LTS	All versions, plus listed versions 4.8.1-1build14.8.3-24.8.3-2build14.8.3-34.8.3-44.8.3-4build24.8.3-4build3	None known
`pdns` Ubuntu:25.10	All versions, plus listed versions 4.9.4-24.9.7-14.9.7-1build25.0.0-2	None known
`pdns` Ubuntu:26.10	All versions, plus listed versions 5.0.2-1build15.0.5-45.1.0-15.1.1-15.1.1-2 Show 4 moreShow less 5.1.1-35.1.2-15.1.3-15.1.4-1	None known
`pdns` Ubuntu:26.04:LTS	All versions, plus listed versions 5.0.0-25.0.1-15.0.2-15.0.2-1build1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, aliases, references	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-33611 is a medium vulnerability (CVSS 6.5) in Powerdns Authoritative, published April 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.42%, the 36th percentile. Fixed in pdns 5.0.4-r0.

References

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