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Dnsdist EUVDEUVD-2026-17361

| CVE-2026-0396 MEDIUM
Basic XSS (CWE-80)
2026-03-31 OX
4.3
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
SUSE
3.1 LOW
AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

6
Severity Changed
Jul 25, 2026 - 10:22 NVD
LOW MEDIUM
CVSS changed
Jul 25, 2026 - 10:22 NVD
3.1 (LOW) 4.3 (MEDIUM)
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
EUVD ID Assigned
Mar 31, 2026 - 12:15 euvd
EUVD-2026-17361
Analysis Generated
Mar 31, 2026 - 12:15 vuln.today
CVE Published
Mar 31, 2026 - 11:50 nvd
LOW 3.1

DescriptionNVD

An attacker might be able to inject HTML content into the internal web dashboard by sending crafted DNS queries to a DNSdist instance where domain-based dynamic rules have been enabled via either DynBlockRulesGroup:setSuffixMatchRule or DynBlockRulesGroup:setSuffixMatchRuleFFI.

AnalysisAI

HTML injection in DNSdist internal web dashboard allows remote unauthenticated attackers to inject malicious content via crafted DNS queries when domain-based dynamic rules are enabled, requiring user interaction to exploit. This affects all DNSdist versions with vulnerable rule functionality and carries low integrity impact with no confidentiality or availability consequences.

Technical ContextAI

DNSdist is PowerDNS's high-performance DNS load balancer and security appliance. The vulnerability stems from insufficient input validation in the DynBlockRulesGroup functionality, specifically the setSuffixMatchRule and setSuffixMatchRuleFFI methods, which process DNS query data that is subsequently reflected into the internal web dashboard without proper HTML escaping. This allows attackers to inject arbitrary HTML/JavaScript content. The root cause is a classic input validation failure (CWE category: Improper Neutralization of Input During Web Page Generation) where DNS query parameters derived from attacker-controlled sources are rendered into a web interface without sanitization. The CPE cpe:2.3:a:powerdns:dnsdist:*:*:*:*:*:*:*:* indicates all DNSdist versions are potentially affected when dynamic rules are configured.

RemediationAI

Apply the security update released by PowerDNS in response to this advisory-consult https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html for the specific patched version number and upgrade procedures. As an interim mitigation, disable domain-based dynamic rules (DynBlockRulesGroup:setSuffixMatchRule and DynBlockRulesGroup:setSuffixMatchRuleFFI) if they are not essential to your deployment, or restrict access to the internal web dashboard to trusted networks only. Input validation improvements in the patched version will sanitize DNS-derived data before rendering in the dashboard.

CVE-2017-7557 HIGH
8.8 Aug 22

dnsdist version 1.1.0 is vulnerable to a flaw in authentication mechanism for REST API potentially allowing CSRF attack.

CVE-2026-24028 HIGH
8.2 Mar 31

Out-of-bounds read in PowerDNS dnsdist allows unauthenticated remote attackers to trigger denial of service or potential

CVE-2026-33593 HIGH
7.5 Apr 22

Remote denial of service in dnsdist allows unauthenticated attackers to crash the DNS load balancer by sending specially

CVE-2026-27853 HIGH
7.5 Mar 31

DNSdist fails to validate packet size bounds when rewriting DNS questions or responses via Lua methods (DNSQuestion:chan

CVE-2026-24030 HIGH
7.5 Mar 31

Memory exhaustion in DNSdist allows remote, unauthenticated attackers to trigger denial of service by crafting malicious

CVE-2026-27854 HIGH
7.5 Mar 31

DNSdist instances using custom Lua code can be crashed via denial of service when the DNSQuestion:getEDNSOptions method

CVE-2026-33602 MEDIUM
6.5 Apr 22

DNSdist is vulnerable to denial of service via out-of-bounds write when processing crafted UDP responses from a rogue ba

CVE-2026-24029 MEDIUM
6.5 Mar 31

PowerDNS dnsdist allows unauthenticated DNS over HTTPS (DoH) queries to bypass access control lists when the early_acl_d

CVE-2018-14663 MEDIUM
5.9 Nov 26

An issue has been found in PowerDNS DNSDist before 1.3.3 allowing a remote attacker to craft a DNS query with trailing d

CVE-2026-33260 MEDIUM
5.3 Apr 22

Denial of service in PowerDNS Authoritative, Recursor, and dnsdist via unbounded memory allocation in their internal web

CVE-2026-33257 MEDIUM
5.3 Apr 22

Unlimited memory allocation in PowerDNS internal web server allows remote denial of service via crafted web requests. Th

CVE-2026-33595 MEDIUM
5.3 Apr 22

dnsdist allows remote denial-of-service attacks through memory exhaustion by generating numerous error responses on sing

Vendor StatusVendor

Debian

dnsdist
Release Status Fixed Version Urgency
bullseye fixed (unfixed) end-of-life
bookworm fixed (unfixed) end-of-life
trixie vulnerable 1.9.10-1+deb13u1 -
forky vulnerable 2.0.2-1 -
sid fixed 2.0.3-1 -
(unstable) fixed 2.0.3-1 -

SUSE

Severity: Low
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise Server 15 SP7 Fixed
SUSE Linux Enterprise Server 16.0 Fixed

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EUVD-2026-17361 vulnerability details – vuln.today

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