CVE-2026-34719
Last modified
CVE-2026-34719 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the webhook model was missing a proper validation for loop back addresses, or link-local addresses — only the URL scheme (HTTP/HTTPS) as well as the hostname was checked. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, the webhook model was missing a proper validation for loop back addresses, or link-local addresses — only the URL scheme (HTTP/HTTPS) as well as the hostname was checked. This could end up in retrieving confidential metadata of cloud/hosting providers. The existing check is now extended and is applied when configuring webhooks as well as triggering webhook jobs. This vulnerability is fixed in 7.0.1 and 6.5.4.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zammad | Zammad | < 6.5.4 |
| Zammad | Zammad | 7.0.0 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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