Quick answers
- Is CVE-2026-36723 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-36723 being exploited in the wild.
- How severe is CVE-2026-36723?
- Informational severity, with a CVSS score of 9.8, published 9 June 2026.
- Which products and versions are affected?
- BookCars 8.3.
- Is there a fix for CVE-2026-36723?
- 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-2026-36723 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-36723?
- Check whether you run BookCars 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
An unrestricted file rename vulnerability exists in the /api/create-user endpoint of BookCars v8.3, specifically within the userRoutes.ts and userController.ts components. Authenticated attackers can utilize directory traversal sequences (e.g., ../) to move files from temporary storage to arbitrary locations on the server's filesystem. This flaw allows for the overwriting of critical application files or the placement of malicious scripts in web-accessible directories. Successful exploitation can lead to unauthorized access to sensitive data, persistent system compromise, and remote code execution (RCE).
Affected products
- BookCars BookCars 8.3
Timeline
- 2026-06-09: disclosed: Initial vulnerability disclosure and CVE assignment.
- 2026-06-09: advisory: NVD published the vulnerability details.