CVE-2026-33611

MEDIUM

Published Apr 22, 2026 Modified May 12, 2026 CWE-190

Description

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.

CVSS v3.1 Score

6.5

MEDIUM

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

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-190 Integer Overflow

Affected Products

Vendor	Product	Versions
powerdns	authoritative	4.9.0 — 4.9.14
powerdns	authoritative	5.0.0 — 5.0.4

References

Other References

https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-powerdns-2026-05.html

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-33611? +

CVE-2026-33611 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-33611? +

CVE-2026-33611 affects products from powerdns, specifically: authoritative. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-33611? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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