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CVE-2026-52690

Spoofed answers can mark an authoritative non-EDNS capable

5.9 MediumFix available

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.43%Up 0.1 points since Jun 26, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.9

Spoofed answers can mark an authoritative non-EDNS capable

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
CVE-2026-52690
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-290
Updated
2026-11-02
EUVDEUVD-2026-39360 5.9

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
EUVD-2026-39360
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-c2h5-7f6m-jqmp 5.9

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS,...

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
GHSA-c2h5-7f6m-jqmp
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-290
Updated
2026-11-02
NVD 5.9

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
CVE-2026-52690
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-290
Updated
2026-11-02
OSVALPINE-CVE-2026-52690 5.9

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
ALPINE-CVE-2026-52690
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 5.9

Spoofed answers can mark an authoritative non-EDNS capable

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
CVE-2026-52690
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2026-52690 5.9

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
DEBIAN-CVE-2026-52690
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-52690 5.9

Spoofing replies to Recursor might mark an IP of an authoritative server as not supporting EDNS, causing valdiation of DNSSEC records served by that server to fail.

Record
UBUNTU-CVE-2026-52690
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
pdns-recursor
Alpine:v3.24
 before 5.4.3-r0
5.4.3-r0
pdns-recursor
Debian:12
 All versions, plus listed versions
4.8.4-14.8.6-14.8.7-14.8.8-14.8.8-1+deb12u1
Show 45 moreShow less
4.9.0-14.9.0-24.9.1-14.9.1-24.9.1-34.9.1-44.9.2-14.9.2-24.9.3-14.9.4-14.9.5-15.0.5-15.0.7-15.0.7-25.0.9-15.1.3-15.1.3-25.2.0-15.2.0-25.2.0-35.2.0-45.2.0-55.2.1-15.2.2-15.2.2-25.2.4-15.2.4-25.2.5-15.3.0-15.3.0-25.3.0-35.3.0-45.3.0-55.3.1-15.3.3-15.3.4-15.3.4-25.3.5-15.4.0-15.4.1-15.4.1-25.4.2-15.4.2-25.4.3-15.4.4-1
 None known
pdns-recursor
Debian:13
 before 5.2.11-0+deb13u1, plus listed versions
5.2.4-25.2.4-2+deb13u15.2.5-15.2.6-0+deb13u15.2.7-0+deb13u15.2.8-0+deb13u15.2.9-0+deb13u1
5.2.11-0+deb13u1
pdns-recursor
Debian:14
 before 5.4.3-1, plus listed versions
5.2.4-25.2.5-15.3.0-15.3.0-25.3.0-3
Show 12 moreShow less
5.3.0-45.3.0-55.3.1-15.3.3-15.3.4-15.3.4-25.3.5-15.4.0-15.4.1-15.4.1-25.4.2-15.4.2-2
5.4.3-1
pdns-recursor
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
3.7.3-14.0.0~alpha1-14.0.0~alpha1-24.0.0~alpha2-24.0.0~alpha2-2ubuntu0.14.0.0~alpha2-2ubuntu0.1+esm1
 None known
pdns-recursor
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
4.0.6-14.0.6-1build14.0.7-14.1.1-14.1.1-1build14.1.1-24.1.1-2ubuntu0.1~esm1
 None known
pdns-recursor
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
4.2.0-64.2.1-14.2.1-1build14.2.1-1build24.2.1-1ubuntu0.1~esm1
 None known
pdns-recursor
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
4.4.2-34.6.0-1ubuntu14.6.0-1ubuntu1+esm1
 None known
pdns-recursor
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.9.0-24.9.1-44.9.2-14.9.2-1build14.9.2-24.9.3-14.9.3-1build24.9.3-1build3
 None known
pdns-recursor
Ubuntu:25.10
 All versions, plus listed versions
5.2.0-55.2.2-15.2.2-25.2.4-25.2.4-2build2
 None known
pdns-recursor
Ubuntu:26.10
 All versions, plus listed versions
5.3.5-15.4.3-15.4.5-1
 None known
pdns-recursor
Ubuntu:26.04:LTS
 All versions, plus listed versions
5.2.4-2build25.3.1-15.3.3-15.3.4-15.3.4-1build15.3.4-25.3.5-1
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-52690 is a medium vulnerability (CVSS 5.9) in Powerdns Recursor, published June 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 36th percentile. Fixed in pdns-recursor 5.4.3-r0.

References

Show 5 moreShow less
This page doesn't list everything

Left out here: 4 versions. The JSON record has them.

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