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Fencer Intel
medium 4.3

CVE-2026-42005 json

Insufficient input validation of internal web server

published 4mo ago modified 14d ago also EUVD-2026-39345

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

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.

Patch / fix

  • PowerDNS Authoritative 4.9.16, 5.0.6, 5.1.2
  • pdns Debian 13 4.9.16-0+deb13u1
  • pdns Debian 14 5.1.2-1
  • dnsdist Debian 13 1.9.15-0+deb13u1
  • dnsdist Debian 14 2.1.0-1
  • pdns-recursor Debian 13 5.2.11-0+deb13u1
  • pdns-recursor Debian 14 5.4.3-1

debian advisories DEBIAN-CVE-2026-42005

  • dnsdist SLES 16.0, SLES for SAP applications 16.0 1.9.15-160000.1.1

suse advisories SUSE-SU-2026:23123-1SUSE-SU-2026:23146-1

  • dnsdist openSUSE Leap 16.0 1.9.15-160000.1.1
  • dnsdist openSUSE Tumbleweed 2.0.7-1.1

opensuse advisories openSUSE-SU-2026:21533-1openSUSE-SU-2026:11411-1

  • pdns-recursor Alpine 3.24 5.4.3-r0

alpine advisories ALPINE-CVE-2026-42005

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-42005 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-42005 updated cvss 6.5

pdns: insufficient input validation of internal web server

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
4mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Affected products

  • PowerDNS Authoritative

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.