MISP cti-transmute up to 1.4.0 Report Builder build_evaluation_report improper authorization

Summaryinfo

A vulnerability classified as problematic has been found in MISP cti-transmute up to 1.4.0. This impacts the function build_evaluation_report of the component Report Builder. Performing a manipulation results in improper authorization. This vulnerability was named CVE-2026-73140. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in MISP cti-transmute up to 1.4.0. It has been classified as problematic. This affects the function build_evaluation_report of the component Report Builder. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality. The summary by CVE is:

Affected versions of cti-transmute fail to apply comment-level access-control rules when generating evaluation report exports. Although normal comment retrieval filters comments according to conversion visibility, comment privacy, ownership, authorship, and administrative privileges, build_evaluation_report() previously included all evaluation comments without applying those rules. Consequently, a user who was authorized to view a conversion could export its evaluation report as Markdown or PDF and obtain private evaluation comments that should only have been visible to the conversion owner, the comment author, or an administrator. The leaked report data also contained the comment author's name. The fix passes the requesting user into the report builder and filters every evaluation comment using the shared access.can_see_comment() authorization function.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-73140 since 08/11/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Applying the patch 5dbd19b39a61eab793586731f1a80d8c38907c42 is able to eliminate this problem.

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Productinfo

Vendor

• MISP

Name

• cti-transmute

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4.0

License

• open-source

Website

• Product: https://github.com/MISP/cti-transmute/

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