CVE-2026-34723: Zammad is a web based open source helpdesk/customer support system

Q: How do I fix CVE-2026-34723?

zammad: upgrade to 6.5.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-34723 being exploited?

CVE-2026-34723 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-34723 affect?

CVE-2026-34723 affects zammad. Severity is high (CVSS 7.5). Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, unauthenticated remote attackers were able to access the getting started endpoint to get access to sensitive internal entity data, even after the

Q: How urgent is CVE-2026-34723?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2026-34723 is a high-severity flaw (CVSS 7.5) 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 and 6.5.4, unauthenticated remote attackers were able to access the getting started endpoint to get access to sensitive internal entity data, even after the system setup was completed. This vulnerability is fixed in 7.0.1 and 6.5.4.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-284
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 UPGRADE

Affected: < 6.5.4 · 7.0.0

Fixed in: 6.5.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 6.5.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zammad

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zammad

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2026-34723?

zammad: upgrade to 6.5.4. Exact commands for each OS are on this page.

Is CVE-2026-34723 being exploited?

CVE-2026-34723 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-2026-34723 affect?

CVE-2026-34723 affects zammad. Severity is high (CVSS 7.5). Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, unauthenticated remote attackers were able to access the getting started endpoint to get access to sensitive internal entity data, even after the

How urgent is CVE-2026-34723?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

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-2026-34724 HIGH 7.2 DOWNGRADE 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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