Is CVE-2026-34718 actively exploited?

No active exploitation of CVE-2026-34718 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34718 be exploited remotely?

Yes. CVE-2026-34718 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34718?

CVE-2026-34718 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-34718

CWE-80Published: April 8, 2026· Updated: Apr 8, 2026

5.3

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:14.6th

Official Description

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the HTML sanitizer for ticket articles was missing proper sanitization of data: ... URI schemes, resulting in storing such malicious content in the database of the Zammad instance. The Zammad GUI is rendering this content, due to applied CSP rules no harm was done by e.g., clicking such a link. This vulnerability is fixed in 7.0.1 and 6.5.4.

NVD Source

Technical Analysis

CVE-2026-34718 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (P) is needed, which slightly reduces the risk of mass automated attacks.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionP

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X