CVE-2026-33593

HIGH

Published Apr 22, 2026 Modified Apr 24, 2026 CWE-369

Description

A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query.

CVSS v3.1 Score

7.5

HIGH

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

EPSS — Exploit Prediction

0.0002

Probability of exploitation

0.03%

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-369 CWE-369

Affected Products

Vendor	Product	Versions
powerdns	dnsdist	1.9.0 — 1.9.13
powerdns	dnsdist	2.0.0 — 2.0.4

References

Advisories & Patches

https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html

Frequently Asked Questions

What is CVE-2026-33593? +

A client can trigger a divide by zero error leading to crash by sending a crafted DNSCrypt query. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-33593? +

CVE-2026-33593 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0002, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-33593? +

CVE-2026-33593 affects products from powerdns, specifically: dnsdist. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-33593? +

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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