CVE-2026-33261 — MEDIUM (5.9)

Q: What is CVE-2026-33261?

CVE-2026-33261 is a vulnerability with a CVSS score of 5.9 (MEDIUM). A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.

Q: How severe is CVE-2026-33261?

CVE-2026-33261 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-33261?

Check the references section above for vendor advisories and patch information. Affected products include: Powerdns Recursor.

Vulnerability Description

A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.

CVSS Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Powerdns	Recursor	>= 5.2.0, < 5.2.9

Related Weaknesses (CWE)

CWE-353

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdnVendor AdvisoryBroken Link

FAQ

What is CVE-2026-33261?

CVE-2026-33261 is a vulnerability with a CVSS score of 5.9 (MEDIUM). A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.

How severe is CVE-2026-33261?

CVE-2026-33261 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-33261?

Check the references section above for vendor advisories and patch information. Affected products include: Powerdns Recursor.