An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21533-1 advisory.

    Update to 1.9.15.

    Changes for dnsdist:

    - https://www.dnsdist.org/changelog.html#change-1.9.15
    - https://www.dnsdist.org/changelog.html#change-1.9.14

    Security issues fixed:

    - CVE-2026-40011: invalid output produced in the prometheus endpoint when a large number of crafted DNS     queries are sent       (bsc#1269204).
    - CVE-2026-40208: processing of DoH3 queries can be delayed via DoH3 GET queries with an invalid DATA     frames       (bsc#1269207).
    - CVE-2026-40209: outgoing TCP connections to backend can get stuck until a timeout occurs when specially     crafted IXFR       queries are sent (bsc#1269206).
    - CVE-2026-40210: out-of-bounds read when `SetMacAddrAction` is used can lead to uninitialized memory     being sent over       the network or a crash (bsc#1269205).
    - CVE-2026-40211: crafted DNS over HTTP/3 queries can trigger an exception that prevents memory from being     freed and can       lead to an OOM condition (bsc#1269203).
    - CVE-2026-42004: crafted EDNS OPT record will be ignored by filtering rules, but will be rewritten as a     valid OPT       record when EDNS Client Subnet is inserted (bsc#1269202).
    - CVE-2026-42005: crafted web request can cause unlimited memory allocation in the internal web server and     lead to a DoS       (bsc#1269201).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to cache
    poisoning. (CVE-2026-33612)

  - ECS zero scoped answers are stored in the packet cache while they should not. This impacts only
    configurations that have ECS enabled; (CVE-2026-40012)

  - An attacker can send a web request that causes unlimited memory allocation in the internal web server,
    leading to a denial of service. The internal web server is disabled by default. (CVE-2026-42005)

  - A malicious authoritative server can send a crafted zone via the ZoneToCache function that leads to a
    crash of the Recursor due to insuffcient input validation. (CVE-2026-42387)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-5ce1370aca advisory.

    - Update to 5.0.6
    - CVE-2026-42005

    Security Advisory: https://doc.powerdns.com/authoritative/security-advisories/powerdns-     advisory-2026-07.html

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-f6ac0db764 advisory.

    - Update to 5.0.6
    - CVE-2026-42005

    Security Advisory: https://doc.powerdns.com/authoritative/security-advisories/powerdns-     advisory-2026-07.html

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the a8614190-73b4-11f1-910d-3c7c3fba4204 advisory.

    PowerDNS Team reports:
    Thanks to people below for reporting these vulnerabilities:
    Thanks to ilya rozentsvaig for reporting this vulnerability.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 62c4ed54-73aa-11f1-910d-3c7c3fba4204 advisory.

    PowerDNS Team reports:
    Thanks to people below for reporting these vulnerabilities.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 6c0e17cf-73a0-11f1-910d-3c7c3fba4204 advisory.

    The DNSdist team reports:
    Thanks to people below for reporting these vulnerabilities.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An attacker can send a web request that causes unlimited memory allocation in the internal web server,     leading to a denial of service. The internal web server is disabled by default. (CVE-2026-42005)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6369 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6369-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     June 25, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : pdns-recursor     CVE ID         : CVE-2026-33612 CVE-2026-40012 CVE-2026-42005                      CVE-2026-42387 CVE-2026-42388 CVE-2026-42390                      CVE-2026-52690

    Multiple vulnerabiliites have been discovered in PDNS Recursor, a     resolving name server which could result in denial of service, cache     poisoning or information disclosure.

    For the stable distribution (trixie), these problems have been fixed in     version 5.2.11-0+deb13u1.

    We recommend that you upgrade your pdns-recursor packages.

    For the detailed security status of pdns-recursor please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/pdns-recursor

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6368 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6368-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     June 25, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : pdns     CVE ID         : CVE-2026-42005

    It was discovered that incorrect request handling in the internal web     server of the PowerDNS DNS server could result in denial of service.

    For the stable distribution (trixie), this problem has been fixed in     version 4.9.16-0+deb13u1.

    We recommend that you upgrade your pdns packages.

    For the detailed security status of pdns please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/pdns

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Debian 13 host has a package installed that is affected by multiple vulnerabilities as referenced in the dsa-6367 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6367-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     June 25, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : dnsdist     CVE ID         : CVE-2026-40011 CVE-2026-40208 CVE-2026-40209                      CVE-2026-40210 CVE-2026-40211 CVE-2026-42004                      CVE-2026-42005

    Multiple security vulnerabilities were discovered in the dnsdist DNS     loadbalancer, which could result in denial of service, information     disclosure or bypass of security rules.

    For the stable distribution (trixie), these problems have been fixed in     version 1.9.15-0+deb13u1.

    We recommend that you upgrade your dnsdist packages.

    For the detailed security status of dnsdist please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/dnsdist

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
333269	openSUSE 16 Security Update : dnsdist (openSUSE-SU-2026:21533-1)	Nessus	SuSE Local Security Checks	medium
445413	Alpine: multiple pdns-recursor packages: security update to 5.4.3-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	high
445413	Alpine: multiple pdns-recursor packages: security update to 5.4.3-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
325079	Fedora 43 : pdns (2026-5ce1370aca)	Nessus	Fedora Local Security Checks	medium
325057	Fedora 44 : pdns (2026-f6ac0db764)	Nessus	Fedora Local Security Checks	medium
323689	FreeBSD : PowerDNS -- vulnerabilities (a8614190-73b4-11f1-910d-3c7c3fba4204)	Nessus	FreeBSD Local Security Checks	critical
323687	FreeBSD : powerdns-recursor -- vulnerabilities (62c4ed54-73aa-11f1-910d-3c7c3fba4204)	Nessus	FreeBSD Local Security Checks	medium
323686	FreeBSD : DNSdist -- vulnerabilities (6c0e17cf-73a0-11f1-910d-3c7c3fba4204)	Nessus	FreeBSD Local Security Checks	medium
323551	Linux Distros Unpatched Vulnerability : CVE-2026-42005	Nessus	Misc.	medium
323062	Debian dsa-6369 : pdns-recursor - security update	Nessus	Debian Local Security Checks	high
323059	Debian dsa-6368 : pdns-backend-bind - security update	Nessus	Debian Local Security Checks	medium
322938	Debian dsa-6367 : dnsdist - security update	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2026-42005

medium

Tenable Plugins

medium

high

high

medium

medium

critical

medium

medium

medium

high

medium

medium