MISP cti-transmute up to 1.4.0 Search Highlighting Feature highlight cross site scripting

Summaryinfo

A vulnerability categorized as problematic has been discovered in MISP cti-transmute up to 1.4.0. The impacted element is the function highlight of the component Search Highlighting Feature. The manipulation results in cross site scripting. This vulnerability is reported as CVE-2026-73161. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in MISP cti-transmute up to 1.4.0. It has been classified as problematic. Affected is the function highlight of the component Search Highlighting Feature. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

Affected versions of cti-transmute improperly handle conversion-table values passed through the search highlighting feature. The highlight() function previously returned the underlying text directly when no search query was supplied, or performed a regex replacement that inserted <mark> tags without first escaping the original content. Because the resulting value is used by an HTML-rendering sink, malicious markup contained in conversion data could be interpreted as HTML rather than displayed as text. The fix introduces a shared highlightMatches() helper that first converts special characters such as <, >, &, and quotes into HTML entities. Only after escaping does the code insert the application-controlled <mark> element used for search highlighting.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-73161 since 08/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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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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