Openproject
CVE-2026-24685
HIGH
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionGitHub Advisory
OpenProject is an open-source, web-based project management software. Versions prior to 16.6.6 and 17.0.2 have an arbitrary file write vulnerability in OpenProject’s repository diff download endpoint (/projects/:project_id/repository/diff.diff) when rendering a single revision via git show. By supplying a specially crafted rev value (for example, rev=--output=/tmp/poc.txt), an attacker can inject git show command-line options. When OpenProject executes the SCM command, Git interprets the attacker-controlled rev as an option and writes the output to an attacker-chosen path. As a result, any user with the :browse_repository permission on the project can create or overwrite arbitrary files that the OpenProject process user is permitted to write. The written contents consist of git show output (commit metadata and patch), but overwriting application or configuration files still leads to data loss and denial of service, impacting integrity and availability. The issue has been fixed in OpenProject 17.0.2 and 16.6.6.
AnalysisAI
Arbitrary file write in OpenProject versions before 16.6.6 and 17.0.2 allows authenticated users with repository browse permissions to inject malicious git command options via a crafted rev parameter, enabling creation or overwriting of arbitrary files with the privileges of the OpenProject process. An attacker can exploit the /projects/:project_id/repository/diff.diff endpoint to write git show output to attacker-controlled file paths on the server. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | OpenProject versions before 16.6.6 or 17.0.2 with repository diff download endpoint enabled. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 8.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker could exploit this flaw, data loss and denial of service, impacting integrity and ava. |
| Remediation | Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all OpenProject instances in your environment and document their versions. …
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External POC / Exploit Code
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