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TI-2026-29019 Aliases CVE-2026-40208GHSA-2cpw-vgr2-pw3h

Denial of service via DoH3 queries

Priority LOW 18CWE-705Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

An attacker might be able to delay the processing of DoH3 queries by sending DoH3 GET queries with an invalid DATA frame.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00402 34th percentileScored 2026-11-07
Fix Fixed DNSdist (PowerDNS): 1.9.15, 2.0.7

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
PowerDNSDNSdist1.9.0 to before 1.9.15; 2.0.0 to before 2.0.71.9.15, 2.0.7Patch availableCNA
  • DNSdist VendorPowerDNS Affected 1.9.0 to before 1.9.15; 2.0.0 to before 2.0.7 Fixed in 1.9.15, 2.0.7 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:*——PowerDNS
  • cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:* Versions — — ·PowerDNS

Remediation

  • Fix · CNA DNSdist (PowerDNS) Fixed in 1.9.15, 2.0.7

Fixed in the same release

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

  • Release ·

    PowerDNS DNSdist 1.9.15, 2.0.7

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2026-29022 Denial of service via crafted DoH3 queriesPriority LOW 31
    • TI-2026-29020 Denial of service via IXFR queriesPriority LOW 31
    • TI-2026-29021 Out-of-bounds read in SetMacAddrActionPriority LOW 23
    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-2026-40208
  2. 2026-10-03 Alias added: GHSA-2cpw-vgr2-pw3h

References

Other 1

  • 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-2021-14878 PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by… CVSS 3.1HIGH 7.5
  • TI-2016-04703 PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . CVSS 3.0HIGH 7.5
  • TI-2018-12065 Out-of-bounds read in [UNKNOWN] pdns-recursor CVSS 3.0HIGH 7.5
See all 130 →

Sources

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