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Vulnerability record · CVE-2026-33257 · published 22 April 2026

CVE-2026-33257: Powerdns authoritative allocation without limits vulnerability

Powerdns · Authoritative

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.

7.5 CVSS 3.1 High EPSS 1.1% · top 37.0% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://docs.powerdns.com/authoritative/security-advisories/powerdns-advisory-2026-05.html Vendor Advisory
https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html Broken LinkVendor Advisory
https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-04.html Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2009-4009Powerdns recursor memory buffer overflow vulnerabilityBuffer overflow in PowerDNS Recursor before 3.1.7.2 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary…EPSS 18%9.8CVE-2026-33608Powerdns authoritative code injection vulnerabilityAn attacker can send a notify request that causes a new secondary domain to be added to the bind backend, but causes said backend to update its confi…EPSS 0.59%9.8CVE-2020-24698Powerdns authoritative double free vulnerabilityAn issue was discovered in PowerDNS Authoritative through 4.3.0 when --enable-experimental-gss-tsig is used. A remote, unauthenticated attacker might…EPSS 3.2%9.8CVE-2019-3807Powerdns recursor insufficient verification of data authenticity vulnerabilityAn issue has been found in PowerDNS Recursor versions 4.1.x before 4.1.9 where records in the answer section of responses received from authoritative…EPSS 0.35%9.1CVE-2026-33598Powerdns dnsdist out-of-bounds read vulnerabilityA cached crafted response can cause an out-of-bounds read if custom Lua code calls getDomainListByAddress() or getAddressListByDomain() on a packet c…EPSS 2.8%8.8CVE-2020-10030Powerdns recursor out-of-bounds read vulnerabilityAn issue has been found in PowerDNS Recursor 4.1.0 up to and including 4.3.0. It allows an attacker (with enough privileges to change the system's ho…EPSS 24%8.8CVE-2017-7557Powerdns dnsdist improper authentication vulnerabilitydnsdist version 1.1.0 is vulnerable to a flaw in authentication mechanism for REST API potentially allowing CSRF attack.EPSS 0.83%8.6CVE-2026-42000Powerdns authoritative command injection vulnerabilityInsufficient Validation of Names During AXFREPSS 0.54%

Source: NIST National Vulnerability Database (record CVE-2026-33257), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.