CVE-2023-26437

3.4 LOW 0.6% exploit odds Fix listed

What it is

Denial of service vulnerability in PowerDNS Recursor allows authoritative servers to be marked unavailable.This issue affects Recursor: through 4.6.5, through 4.7.4 , through 4.8.3.

At a glance

Exploitability: Can be exploited over the network without logging in, but needs a user to act. Limited direct impact.
Exploit odds: 0.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2023-04-04 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 05:43 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.6% in the next 30 days (EPSS).
Severity: 3.4 LOW (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2023-04-04 15:15 UTC
Last modified: 2026-06-17 05:43 UTC
Exploit probability: 0.6% · EPSS, next 30 days
Weakness: CWE-400 · Uncontrolled resource consumption
Record status: Modified

Affected

Powerdns Recursor < 4.6.6
Powerdns Recursor < 4.7.5
Powerdns Recursor < 4.8.4

Attack profile CVSS 3.1 · 3.4

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: Required
Scope: Changed
Confidentiality: None
Integrity: None
Availability: Low

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-26437.md and follow it. Check whether this project is affected by CVE-2023-26437. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record