Quick answers
- Is CVE-2026-88940 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88940 being exploited in the wild.
- How severe is CVE-2026-88940?
- Medium severity, with a CVSS score of 5.3, published 10 September 2026.
- Which products and versions are affected?
- Knowns-Dev Knowns through 0.33.0.
- Is there a fix for CVE-2026-88940?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-88940 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-88940?
- Check whether you run Knowns-Dev Knowns at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a path traversal flaw (CWE-22) in the workspace browse endpoint (GET /api/workspaces/browse, workspace.go:41-110). The browse() function accepts arbitrary ?path= query parameter values and passes them directly to os.ReadDir(filepath.Abs(dir)) without any allowlist validation or root-containment checks. An unauthenticated attacker can traverse the entire host filesystem and enumerate all valid Knowns project directories (identified by isProject: true markers), disclosing their absolute paths. This enumeration serves as the reconnaissance phase for a chained multi-stage exploit that combines it with a separate bootstrap gate bypass vulnerability (CWE-863) to escalate privileges and access arbitrary projects. No authentication or user interaction is required; the attack vector is network-accessible.
Affected products
- knowns-dev knowns through 0.33.0
Timeline
- 2026-09-10: disclosed: CVE-2026-88940 published on NVD