4.3

CVE-2026-42005: powerdns authoritative Uncontrolled Resource Consumption

CVSS: 4.3v3.1MediumDeferred
AliasesUBUNTU-CVE-2026-42005DEBIAN-CVE-2026-42005
Published 25-06-2026Last modified 25-06-2026
Open JSON

Vulnerability summary

CVE-2026-42005 is a medium (CVSS 4.3) Uncontrolled Resource Consumption vulnerability in powerdns authoritative. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.63%
0%100%
Low · +0.28 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2026:11411-1OPENSUSE-SU-2026:21533-1SUSE-SU-2026:23123-1SUSE-SU-2026:23146-1

Timeline

  1. 25-06-2026
    PublishedVulnerability first disclosed.
  2. 25-06-2026
    Last modifiedVulnerability information updated.

Description

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.28 pp

From 0.34% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.63%

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

Debian3 products
  • dnsdistAll versions (No fix recorded) | < 1.9.15-0+deb13u1 | < 2.1.0-1
  • pdnsAll versions (No fix recorded) | < 4.9.16-0+deb13u1 | < 5.1.2-1
  • pdns-recursorAll versions (No fix recorded) | < 5.2.11-0+deb13u1 | < 5.4.3-1
Ubuntu3 products
  • dnsdistAll versions (No fix recorded)
  • pdnsAll versions (No fix recorded)
  • pdns-recursorAll versions (No fix recorded)
Powerdns1 product
  • authoritative≥ 4.9.0, < 4.9.16 | ≥ 5.0.0, < 5.0.6 | ≥ 5.1.0, < 5.1.2

3 vendors · 7 products

References

8 links