What is CVE-2026-33611?

CVE-2026-33611 is a medium-severity vulnerability in Powerdns Authoritative, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-04-22.

How severe is CVE-2026-33611?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Integer overflow in Powerdns Authoritative

CVE-2026-33611

An operator allowed to use the REST API can cause the Authoritative server to produce invalid HTTPS or SVCB record data, which can in turn cause LMDB database corruption, if using the LMDB backend.

Vulnerability class: Integer Overflow

EPSS: 0.000 (0.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H.

Affected products

Powerdns Authoritative — versions 5.0.0, 4.9.0

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

security@open-xchange.com (Broken Link)

Frequently asked questions

What is CVE-2026-33611?: CVE-2026-33611 is a medium-severity vulnerability in Powerdns Authoritative, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-04-22.
How severe is CVE-2026-33611?: Medium severity. CVSS v3 base score is 6.5 out of 10.