CVE-2026-56726

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Source

https://cve.org/CVERecord?id=CVE-2026-56726

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56726.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-56726

Aliases

GHSA-96hh-fmj3-h4hp

Published

2026-09-25T17:01:00Z

Modified

2026-09-27T03:47:32Z

Severity

5.1 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator

Summary

Zammad: Missing authorization check in GitHub + GitLab integration allows cross-ticket data leak

Details

Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, this vulnerability breaks normal ticket isolation boundaries between agents. Any authenticated agent, even one with no active tickets assigned to them, can view the titles, status, labels, and URL links of GitHub/GitLab issues attached to any ticket in the system. This allows an internal user to systematically view GitHub/GitLab issue data linked by other agents or administrators across the organization by simply querying random or sequential ticket IDs. This vulnerability is fixed in 7.0.2.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-862"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56726.json"
}

References

Affected packages

Git / github.com/zammad/zammad

Affected ranges

Type

GIT

Repo

https://github.com/zammad/zammad

Events

Introduced

Fixed

c767f32c006ff9842152f78e12f355f7f485304f

Fixed

e50ef69beab897317caa5e9490edba33aa1ac978

Fixed

9dc15acf239dbc32ec357708859f2d86b188846c

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "7.0.2"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*

1.6.0

3.*

3.7.0

5.*

5.2.0-alpha

5.3.0-alpha

5.4.0-alpha

5.5.0-alpha

6.*

6.0.0-alpha

6.1.0-alpha

6.2.0-alpha

6.3.0-alpha

6.4.0-alpha

6.5.0-alpha

6.6.0-alpha

7.*

7.0.0

7.0.0-alpha

7.0.1

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56726.json"