CVE-2026-33602

MEDIUM
Published Apr 22, 2026 Modified Apr 24, 2026 CWE-122

Description

A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.

CVSS v3.1 Score

6.5
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS — Exploit Prediction

0.0001
Probability of exploitation
0.00%
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-122 CWE-122

Affected Products

Vendor Product
powerdns dnsdist
powerdns dnsdist

References

Frequently Asked Questions

What is CVE-2026-33602? +
A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service. It has a CVSS v3.1 base score of 6.5 (MEDIUM).
How severe is CVE-2026-33602? +
CVE-2026-33602 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-2026-33602? +
CVE-2026-33602 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-2026-33602? +
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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