Security readout for executives and security teams
Plain-English summary
CVE-2026-22605 lets an authenticated OpenProject user with meeting-view rights in any project see meeting details from projects they should not access. The impact is limited to confidentiality, but meeting content may include sensitive project, staffing, or business information. OpenProject fixed the issue in version 16.6.3.
Executive priority
Treat as a near-term confidentiality fix, especially for organizations using OpenProject for sensitive projects. It is not currently evidenced as exploited, but the patch is available and the access-control failure may expose internal meeting information.
Technical view
OpenProject versions before 16.6.3 contain an insecure direct object reference in Meetings. A low-privileged authenticated user with View Meetings permission on any project could access meeting details tied to other projects without project access. CVSS 3.1 is 4.3, with network attack vector, low complexity, privileges required, no user interaction, and low confidentiality impact.
Likely exposure
Exposure is limited to OpenProject deployments running versions earlier than 16.6.3 where users have View Meetings permission. Internet-facing instances increase discovery risk, but exploitation still requires an authenticated account with that permission.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not listed as KEV. The flaw is an authorization bypass/IDOR affecting meeting detail access, not code execution or service availability.
Researcher notes
Root issue maps to CWE-284 and IDOR-style object authorization failure in Meetings. Sources identify affected versions only as prior to 16.6.3. No exploit details, indicators, or additional mitigations are provided in the supplied public references.
Mitigation direction
- Upgrade OpenProject to version 16.6.3 or later.
- Review vendor advisory and release notes for deployment-specific guidance.
- Limit View Meetings permission to users with a clear business need.
- Review meeting content for sensitive information in affected deployments.
Validation and detection
- Inventory OpenProject instances and confirm their running version.
- Identify users or groups with View Meetings permission.
- Confirm projects with sensitive meetings are access-restricted as intended.
- After upgrade, verify unauthorized users cannot view cross-project meeting details.
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-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2026-22605 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
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:U/C:L/I:N/A:N2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/opf/openproject/security/advisories/GHSA-fq4m-pxvm-8x2jCVE reference · x_refsource_CONFIRM
- https://github.com/opf/openproject/releases/tag/v16.6.3CVE 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.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.