7.5

CVE-2026-33254: powerdns dnsdist

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-33254DEBIAN-CVE-2026-33254
Published 22-04-2026Last modified 22-04-2026
Open JSON

Vulnerability summary

CVE-2026-33254 is a high (CVSS 7.5) vulnerability in powerdns dnsdist. EPSS estimates a 0.80% chance of exploitation in the next 30 days, higher than 55.9% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.80%
0%100%
Low · +0.43 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2026:10632-1OPENSUSE-SU-2026:21015-1SUSE-SU-2026:22319-1

Timeline

  1. 22-04-2026
    PublishedVulnerability first disclosed.
  2. 22-04-2026
    Last modifiedVulnerability information updated.

Description

An attacker can create a large number of concurrent DoQ or DoH3 connections, causing unlimited memory allocation in DNSdist and leading to a denial of service. DOQ and DoH3 are disabled by default.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.80%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.43 pp

From 0.37% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.80%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • dnsdistAll versions (No fix recorded) | < 1.9.14-0+deb13u1 | < 2.0.4-1
Powerdns1 product
  • dnsdist≥ 1.9.0, < 1.9.13 | ≥ 2.0.0, < 2.0.4
Ubuntu1 product
  • dnsdistAll versions (No fix recorded)

3 vendors · 3 products

References

5 links