Ericsson CodeChecker up to 6.29.2 HTML Report Generation json.dumps HTML injection

Summaryinfo

A vulnerability classified as problematic has been found in Ericsson CodeChecker up to 6.29.2. Affected is the function json.dumps of the component HTML Report Generation. This manipulation causes HTML injection. This vulnerability is registered as CVE-2026-84164. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Ericsson CodeChecker up to 6.29.2 and classified as problematic. Affected by this vulnerability is the function json.dumps of the component HTML Report Generation. The manipulation with an unknown input leads to a html injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

The HTML report that plist-to-html, CodeChecker parse --export html and CodeChecker cmd diff --output html generate puts the report message, the checker name and the source file path into a script block through json.dumps. json.dumps does not escape the less-than character, so a closing script tag in any of those three fields ends the script element and what follows is parsed as HTML. The input author is whoever controls the analysed tree or a third-party result file that report-converter ingests, or who holds PRODUCT_STORE in the cmd diff flow. The viewer is somebody else: docs/jenkins_gerrit_integration.md documents writing the report into Jenkins userContent and posting its URL into a Gerrit review. One caveat worth stating up front is that Jenkins serves userContent under a restrictive CSP that would block an inline handler, so that destination is probably safe as configured. The generated report sets no CSP of its own, so the impact lands wherever it is published without one.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-84164 since 09/01/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 6.29.3 eliminates this vulnerability.

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Productinfo

Vendor

• Ericsson

Name

• CodeChecker

Version

• 6.29.0
• 6.29.1
• 6.29.2

Website

• Product: https://github.com/Ericsson/codechecker/

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