CVE-2026-33609
LDAP DN injection
CVE-2026-33609 is a medium vulnerability (CVSS 5.3) 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 0.24%, the 15th percentile. Fixed in pdns 5.0.4-r0.
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
LDAP DN injection
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
CVE-2026-33609- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-90
- Updated
- 2026-11-02
EUVDEUVD-2026-24947
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
EUVD-2026-24947- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-q8p8-x4x3-fvqm
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform...
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
GHSA-q8p8-x4x3-fvqm- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-90
- Updated
- 2026-11-02
NVD
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
CVE-2026-33609- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-90
- Updated
- 2026-11-02
OSVALPINE-CVE-2026-33609
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
ALPINE-CVE-2026-33609- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
OSV
LDAP DN injection
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
CVE-2026-33609- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-33609
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
DEBIAN-CVE-2026-33609- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-33609
Incomplete escaping of LDAP queries when running with 8bit-dns enabled allows users to perform queries of internal domain subtrees.
- Record
UBUNTU-CVE-2026-33609- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pdnsAlpine:v3.23 |
before 5.0.4-r0 | 5.0.4-r0 |
pdnsAlpine:v3.24 |
before 5.0.4-r0 | 5.0.4-r0 |
pdnsDebian: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 less4.8.2-14.8.2-24.8.3-14.8.3-24.8.3-34.8.3-44.9.0-14.9.0-24.9.1-14.9.1-24.9.1-34.9.2-14.9.2-24.9.3-14.9.3-24.9.3-34.9.4-14.9.4-24.9.7-15.0.0-15.0.0-25.0.1-15.0.2-15.0.3-15.0.4-15.0.5-15.0.5-25.0.5-35.0.5-45.1.0-15.1.1-15.1.1-25.1.1-35.1.2-15.1.3-15.1.4-15.1.5-1 |
None known |
pdnsDebian:13 |
before 4.9.14-0+deb13u1, plus listed versions 4.9.7-1 |
4.9.14-0+deb13u1 |
pdnsDebian: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 |
pdnsUbuntu: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 less4.0.0~alpha1-14.0.0~alpha2-24.0.0~alpha2-34.0.0~alpha2-3build14.0.0~alpha2-3ubuntu0.1~esm1 |
None known |
pdnsUbuntu: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 |
pdnsUbuntu: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 |
pdnsUbuntu: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 |
pdnsUbuntu: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 |
pdnsUbuntu:25.10 |
All versions, plus listed versions 4.9.4-24.9.7-14.9.7-1build25.0.0-2 |
None known |
pdnsUbuntu: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 less5.1.1-35.1.2-15.1.3-15.1.4-1 |
None known |
pdnsUbuntu:26.04:LTS |
All versions, plus listed versions 5.0.0-25.0.1-15.0.2-15.0.2-1build1 |
None known |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | affected, aliases, references | OSV |
| 2026-11-02 | created | CVE List, EUVD, GitHub Advisories, NVD, OSV |
References
docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-05.html
nvd.nist.gov/vuln/detail/CVE-2026-33609
github.com/advisories/GHSA-q8p8-x4x3-fvqm
security.alpinelinux.org/vuln/CVE-2026-33609
repo.powerdns.com