PT-2026-34320 · Powerdns · Powerdns Recursor

Published 2026-04-22 · Updated 2026-04-23 · CVE-2026-33256

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions The product name cannot be determined (affected versions not specified)

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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-33256

Affected Products

Powerdns Recursor

References · 9

• https://security-tracker.debian.org/tracker/CVE-2026-33256 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-33256 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-33256 · Vendor Advisory
• https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-33256 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-33256 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33256 · Security Note
• https://twitter.com/CVEnew/status/2047012156986790098 · Twitter Post
• https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-03.html#cve-2026-33256-unbounded-memory-allocation-by-internal-web-server · Note