Security readout for executives and security teams
Plain-English summary
CVE-2026-22600 lets a logged-in OpenProject user with attachment upload rights make the server read local files during PDF export. Sensitive configuration and project data could be exposed if the OpenProject process can access them. OpenProject before 16.6.4 is affected, and version 16.6.4 contains the fix.
Executive priority
Treat this as an urgent patching item for any internet-accessible or broadly used OpenProject instance. Although exploitation requires an authenticated user, the potential impact includes disclosure of sensitive project and configuration data. Prioritize upgrade to 16.6.4 and review user permissions.
Technical view
OpenProject work package PDF export before 16.6.4 can invoke ImageMagick processing on an uploaded SVG disguised as a PNG. During image resizing, the ImageMagick text: coder may read arbitrary local files accessible to the application user. The CVSS 3.1 score is 9.1, vector AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L, CWE-200.
Likely exposure
Exposure is limited to OpenProject deployments below 16.6.4 where users can upload attachments to containers that can be exported to PDF, such as work packages. The attacker needs valid privileges, but no user interaction is required after the vulnerable export path is triggered.
Exploitation context
The source bundle does not indicate known active exploitation, and KEV is false. The vulnerability is serious because low-privileged authenticated access may expose local files including configuration, private project data, and system-readable files under the OpenProject service account.
Researcher notes
Evidence comes from the CVE record, GitHub security advisory, and v16.6.4 release reference. The advisory states arbitrary local file read through ImageMagick during PDF export. Public sources provided do not confirm exploitation in the wild or list additional affected products beyond opf/openproject before 16.6.4.
Mitigation direction
- Upgrade OpenProject to version 16.6.4 or later.
- If upgrade is not possible, apply the vendor-provided patch manually.
- Review and limit attachment upload rights for exportable containers.
- Review and limit PDF export access until remediation is complete.
- Follow the GitHub advisory and OpenProject release notes for current guidance.
Validation and detection
- Inventory all OpenProject instances and confirm their running version.
- Identify instances below 16.6.4 as affected.
- Confirm whether work package attachments and PDF export are enabled.
- Review roles allowed to upload attachments to exportable containers.
- Check audit logs for unusual attachment uploads and PDF exports.
- Verify the patched version or manual patch is deployed successfully.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-22600 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L3.15.3Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/opf/openproject/security/advisories/GHSA-m8f2-cwpq-vvhhCVE reference · x_refsource_CONFIRM
- https://github.com/opf/openproject/releases/tag/v16.6.4CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.