CVE-2026-34724

HighRCE

Published: 08 April 2026

Published

08 April 2026

Modified

17 April 2026

KEV Added

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Patch

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CVSS Score v4 8.7 CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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

EPSS Score 0.0026 17.3th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-34724 is a high-severity Code Injection (CWE-94) vulnerability in Zammad Zammad. Its CVSS base score is 8.7 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 17.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

This vulnerability is AI-related — categorised as AI Agent Protocols and Integrations; in the LLM/Generative AI Risks risk domain.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-34724 is a server-side template injection vulnerability in Zammad, a web-based open source helpdesk and customer support system. Affecting versions prior to 7.0.1, the flaw exists in the AI Agent component and allows remote code execution (RCE) when an attacker can control or influence the type_enrichment_data parameter, which is typically configured by high-privilege administrators. The vulnerability is associated with CWE-94 (Improper Control of Generation of Code) and CWE-1336 (Incorrect Handling of Code Blocks in Templating Engine), earning a CVSS v3.1 base score of 7.2 (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

Exploitation requires high privileges (PR:H), limiting it to authenticated attackers with administrative access who can manipulate type_enrichment_data during configuration. Successful exploitation enables arbitrary code execution on the server, potentially granting full control over the affected Zammad instance with high confidentiality, integrity, and availability impacts.

The official advisory on GitHub (GHSA-fg9w-jg8f-4j94) confirms the issue is fixed in Zammad 7.0.1, recommending immediate upgrades to mitigate the vulnerability. No workarounds are specified beyond applying the patch.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2026-20564

Vulnerability details

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1, a server-side template injection vulnerability which leads to RCE via AI Agent exists. Impact is limited to environments where an attacker can control or influence type_enrichment_data (typically…

high-privilege administrative configuration). This vulnerability is fixed in 7.0.1.

CWE(s): CWE-94 CWE-1336

AI Security AnalysisAI

AI Category: AI Agent Protocols and Integrations
Risk Domain: LLM/Generative AI Risks
OWASP Top 10 for LLMs 2025: None mapped
Classification Reason: Matched keywords: ai

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1059 Command and Scripting Interpreter Execution

Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.

attack.mitre.org →

Why these techniques?

Server-side template injection in a web-based public-facing application directly enables exploitation via T1190; resulting arbitrary code execution on the server facilitates T1059 Command and Scripting Interpreter.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0