CVE-2026-56724Network attack vectorHinoki check available

Cross-scope knowledge-base access via unvalidated links

Published Sep 25, 2026 · Updated Sep 25, 2026

Incorrect authorization in Zammad before 7.0.2 allows remote authenticated users to access knowledge-base items outside their scope. The knowledge-base management area fails to fully validate linked items during permission checks, allowing item linkage to bypass assigned access boundaries. Limited read permissions are required; Zammad has not disclosed the affected endpoint, request parameter, or exact unauthorized interaction.

CVSS severity7.1
High
EPSS probability0.27%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect authorization in Zammad before 7.0.2 allows remote authenticated users to access knowledge-base items outside their scope. The knowledge-base management area fails to fully validate linked items during permission checks, allowing item linkage to bypass assigned access boundaries. Limited read permissions are required; Zammad has not disclosed the affected endpoint, request parameter, or exact unauthorized interaction.

The record

CVE
CVE-2026-56724
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
Zammad GmbH
Product
Zammad
Classifications
CWE-862, CWE-639, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zammad GmbH · Zammadversion=< 7.0.2

Published CVSS scores

7.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CWE-639Authorization Bypass Through User-Controlled Key
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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