# CVE-2026-33257: An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a…

Source: https://junglewise.ai/threats/cve-2026-33257-an-attacker-can-send-a-web-request-that-causes-unlimited-memory  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-22  
License: CC BY 4.0 with a link back

CVE-2026-33257 · Severity: medium · CVSS 5.3 · Published 2026-04-22

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.

Technologies: [Powerdns Authoritative](https://junglewise.ai/threats/technologies/authoritative), [Powerdns Dnsdist](https://junglewise.ai/threats/technologies/dnsdist), [Powerdns Recursor](https://junglewise.ai/threats/technologies/recursor). Vendors: [Powerdns](https://junglewise.ai/threats/vendors/powerdns).

## Quick answers

**Is CVE-2026-33257 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-33257 being exploited in the wild.

**How severe is CVE-2026-33257?** Medium severity, with a CVSS score of 5.3, published 22 April 2026.

**Which products and versions are affected?** Powerdns Authoritative, Powerdns Dnsdist, Powerdns Recursor. The advisory does not name versions.

**Is there a fix for CVE-2026-33257?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-33257?** Check whether you run Powerdns Authoritative, Powerdns Dnsdist or Powerdns Recursor. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Powerdns Authoritative
- Powerdns Dnsdist
- Powerdns Recursor

## Related threats

- [PowerDNS Recursor DNSSEC wildcard validation bypass in RRSIG processing](https://junglewise.ai/threats/cve-2026-52688-powerdns-recursor-dnssec-wildcard-validation-bypass-in-rrsig)
- [PowerDNS Recursor DNSSEC validation bypass in wildcard CNAME/DNAME records](https://junglewise.ai/threats/cve-2026-52686-powerdns-recursor-dnssec-validation-bypass-in-wildcard-cname)
- [PowerDNS Recursor TTL capping bypass in NS record refresh](https://junglewise.ai/threats/cve-2026-52684-powerdns-recursor-ttl-capping-bypass-in-ns-record-refresh)
- [PowerDNS Recursor DNSSEC validation failure via EDNS spoofing](https://junglewise.ai/threats/cve-2026-52690-powerdns-recursor-dnssec-validation-failure-via-edns-spoofing)
- [PowerDNS Recursor improper ZONEMD validation in ZoneToCache](https://junglewise.ai/threats/cve-2026-42390-powerdns-recursor-improper-zonemd-validation-in-zonetocache)