CVE-2026-42396
Publication date 21 May 2026
Last updated 27 May 2026
Ubuntu priority
Description
Insufficient Validation of Member Zone Data May Cause Catalog Zone Transfer to Fail
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| pdns | 26.04 LTS resolute |
Needs evaluation
|
| 25.10 questing |
Needs evaluation
|
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
4.9 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | High |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H |
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-42396
- https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2026-06.html#insufficient-validation-of-member-zone-data-may-cause-catalog-zone-transfer-to-fail
- https://github.com/PowerDNS/pdns/commit/d0bc49a5355906d21e06552b5e3fd87cd5c91406 (auth-5.0.5)