Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-mkcs-362g-t7aq
Vulnerability ID VCID-mkcs-362g-t7aq
Aliases CVE-2023-26437
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 3.1
Risk 1.6
Affected and Fixed Packages Package Details
Weaknesses (0)
There are no known CWE.
System Score Found at
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
epss 9e-05 https://api.first.org/data/v1/epss?cve=CVE-2023-26437
cvssv3.1 3.4 https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html
ssvc Track https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html
cvssv3.1 3.4 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/
ssvc Track https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/
cvssv3.1 3.4 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/
ssvc Track https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2023-26437
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-26437
1033941 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1033941
CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/
IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/
powerdns-advisory-2023-02.html https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L Found at https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-02-13T16:31:03Z/ Found at https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2023-02.html
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-02-13T16:31:03Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CN7VMRYKZHG2UDUAK326LXD3JY7NO3LR/
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:L Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-02-13T16:31:03Z/ Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IHPD6SIQOG7245GXFQHPUEI4AZ6Y3KD6/
Exploit Prediction Scoring System (EPSS)
Percentile 0.00834
EPSS Score 9e-05
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T16:36:30.222672+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.0.0