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CVE-2026-33608

Incomplete domain name sanitization during

7.4 HighFix available

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
High

Exploit likelihood

0.38%Up 0.4 points since Apr 23, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.4

Incomplete domain name sanitization during

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
CVE-2026-33608
CVSS 3.1
7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-94
Updated
2026-11-02
EUVDEUVD-2026-24945 7.4

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
EUVD-2026-24945
CVSS 3.1
7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-q6jm-wh7h-j4g3 7.4

An attacker can send a notify request that causes a new secondary domain to be added to the bind...

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
GHSA-q6jm-wh7h-j4g3
CVSS 3.1
7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-94
Updated
2026-11-02
NVD 7.4

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
CVE-2026-33608
CVSS 3.1
7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-94
Updated
2026-11-02
OSVALPINE-CVE-2026-33608 9.8

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
ALPINE-CVE-2026-33608
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSV 7.4

Incomplete domain name sanitization during

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
CVE-2026-33608
CVSS 3.1
7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2026-33608 9.8

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
DEBIAN-CVE-2026-33608
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-33608 7.4

An attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its configuration to an invalid one, leading to the backend no longer able to run on the next restart, requiring manual operation to fix it.

Record
UBUNTU-CVE-2026-33608
CVSS 3.1
7.4 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
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
RecordedChangedSources
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-33608 is a high vulnerability (CVSS 7.4) 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 0.38%, the 32nd percentile. Fixed in pdns 5.0.4-r0.

References

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