CVE-2026-42396

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

4.9 MediumFix available

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

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: None
Availability: High

Exploit likelihood

0.35%Up 0.3 points since May 21, 2026

What each source reports

CVE List Score used 4.9

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: CVE-2026-42396
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-94
Updated: 2026-11-02

EUVDEUVD-2026-31265 4.9

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: EUVD-2026-31265
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

GitHub AdvisoriesGHSA-hm6h-mcgv-h2x8 4.9

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: GHSA-hm6h-mcgv-h2x8
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-94
Updated: 2026-11-02

NVD 4.9

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: CVE-2026-42396
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-94
Updated: 2026-11-02

OSVALPINE-CVE-2026-42396 6.5

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: ALPINE-CVE-2026-42396
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-03

OSV 4.9

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: CVE-2026-42396
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

OSVDEBIAN-CVE-2026-42396 6.5

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: DEBIAN-CVE-2026-42396
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-42396 4.9

Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail

Record: UBUNTU-CVE-2026-42396
CVSS 3.1: 4.9 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/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 5.0.5-r0	5.0.5-r0
`pdns` Alpine:v3.24	before 5.0.5-r0	5.0.5-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 36 moreShow less 4.8.2-14.8.2-24.8.3-14.8.3-24.8.3-34.8.3-44.9.0-14.9.0-24.9.1-14.9.1-24.9.1-34.9.2-14.9.2-24.9.3-14.9.3-24.9.3-34.9.4-14.9.4-24.9.7-15.0.0-15.0.0-25.0.1-15.0.2-15.0.3-15.0.4-15.0.5-15.0.5-25.0.5-35.0.5-45.1.0-15.1.1-15.1.1-25.1.1-35.1.2-15.1.3-15.1.4-1	None known
`pdns` Debian:13	before 4.9.15-0+deb13u1, plus listed versions 4.9.14-0+deb13u14.9.7-1	4.9.15-0+deb13u1
`pdns` Debian:14	before 5.0.5-1, plus listed versions 4.9.7-15.0.0-15.0.0-25.0.1-15.0.2-15.0.3-15.0.4-1	5.0.5-1
`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-2026-42396 is a medium vulnerability (CVSS 4.9) in Powerdns Authoritative, published May 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 29th percentile. Fixed in pdns 5.0.5-r0.

References

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