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TI-2023-11585 Aliases CVE-2023-26437GHSA-4wg5-gmxh-4r2r

Deterred spoofing attempts can lead to authoritative servers being marked unavailable

Priority LOW 25CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00593 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PowerDNSRecursorup to 4.6.5; up to 4.7.4; up to 4.8.3—No fix listedCNA
  • Recursor VendorPowerDNS Affected up to 4.6.5; up to 4.7.4; up to 4.8.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*before 4.6.6; 4.7.0 to before 4.7.5; 4.8.0 to before 4.8.4VulnerablePowerDNS
  • cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:* Versions before 4.6.6; 4.7.0 to before 4.7.5; 4.8.0 to before 4.8.4 Vulnerable ·PowerDNS

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-26437
  2. 2026-10-03 Alias added: GHSA-4wg5-gmxh-4r2r

References

Advisory 1

Other 2

  • TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
  • TI-2023-27773 The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance… CVSS 3.1HIGH 7.5
  • TI-2015-01678 The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and… CVSS 2.0HIGH 7.8
  • TI-2018-12065 Out-of-bounds read in [UNKNOWN] pdns-recursor CVSS 3.0HIGH 7.5
  • TI-2017-11091 NULL pointer dereference in PowerDNS pdns-recursor CVSS 3.0HIGH 7.5
  • TI-2014-07065 PowerDNS Recursor before 3.6.2 does not limit delegation chaining, which allows remote… CVSS 2.0MEDIUM 5.0
See all 49 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences