CVE-2026-34724: Zammad is a web based open source helpdesk/customer support system

Routine

HIGH 7.2DOWNGRADE

CVE-2026-34724 is a high-severity flaw (CVSS 7.2) affecting zammad. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-94, CWE-1336
Published	2026-04-08
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: zammad

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 19:25 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

zammad zammad DOWNGRADE

Affected: 7.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy zammad || rpm -q zammad || zammad --version

2. No fixed release: DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison zammad sudo apt install zammad=<VERSION_BEFORE_7.0.0> sudo apt-mark hold zammad

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list zammad sudo dnf downgrade zammad-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add zammad

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34724?

zammad: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-34724 being exploited?

CVE-2026-34724 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34724 affect?

CVE-2026-34724 affects zammad. Severity is high (CVSS 7.2). 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 i

How urgent is CVE-2026-34724?

Priority 31/100. High severity

Related CVEs

CVE-2026-102489 CRITICAL 9.8 EXPLOITED UPGRADE Zammad GmbH Zammad Session Fixation Vulnerability
CVE-2026-102490 HIGH 7.8 EXPLOITED UPGRADE Zammad GmbH Zammad Improper Privilege Management Vulnerability
CVE-2026-34723 HIGH 7.5 UPGRADE Zammad is a web based open source helpdesk/customer support system
CVE-2026-34721 MEDIUM 6.5 UPGRADE Zammad is a web based open source helpdesk/customer support system
CVE-2026-34248 MEDIUM 5.7 DOWNGRADE Zammad is a web based open source helpdesk/customer support system

References

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