Read the docs
TI-2026-25992 Aliases CVE-2026-33610GHSA-7rv6-r2fm-295c

Possible file descriptor exhaustion in forward-dnsupdate

Priority LOW 33CWE-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 · High
Fix status
Fixed

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

Summary

A rogue primary server may cause file descriptor exhaustion and eventually a denial of service, when a PowerDNS secondary server forwards a DNS update request to it.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00393 33rd percentileScored 2026-11-07
Fix Fixed Authoritative (PowerDNS): 5.0.4, 4.9.14

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
PowerDNSAuthoritative5.0.0 to before 5.0.4; 4.9.0 to before 4.9.145.0.4, 4.9.14Patch availableCNA
  • Authoritative VendorPowerDNS Affected 5.0.0 to before 5.0.4; 4.9.0 to before 4.9.14 Fixed in 5.0.4, 4.9.14 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*4.9.0 to before 4.9.14; 5.0.0 to before 5.0.4VulnerablePowerDNS
  • cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:* Versions 4.9.0 to before 4.9.14; 5.0.0 to before 5.0.4 Vulnerable ·PowerDNS

Remediation

  • Fix · CNA Authoritative (PowerDNS) Fixed in 5.0.4, 4.9.14

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    PowerDNS Authoritative 4.9.14, 5.0.4

    6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-25990 Incomplete domain name sanitization duringPriority MEDIUM 48
    • TI-2026-25677 Insufficient input validation of internal webserverPriority LOW 39
    • TI-2026-25674 Insufficient input validation of internal webserverPriority LOW 39
    Show all 6 records →

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-2026-33610
  2. 2026-10-03 Alias added: GHSA-7rv6-r2fm-295c
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Advisory 1

  • 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-2016-04703 PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . CVSS 3.0HIGH 7.5
  • TI-2015-04466 PowerDNS (aka pdns) Authoritative Server 3.4.4 before 3.4.7 allows remote attackers to… CVSS 2.0MEDIUM 5.0
  • TI-2016-04702 PowerDNS (aka pdns) Authoritative Server before 3.4.10 allows remote attackers to cause a… CVSS 3.0HIGH 7.5
  • TI-2026-25990 Incomplete domain name sanitization during CVSS 3.1CRITICAL 9.8
  • TI-2020-15157 An issue was discovered in PowerDNS Authoritative through 4.3.0 when… CVSS 3.1CRITICAL 9.8
See all 30 →

Sources

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