Quick answers
- Is CVE-2026-39783 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-39783 being exploited in the wild.
- How severe is CVE-2026-39783?
- Medium severity, with a CVSS score of 4.3, published 5 October 2026.
- Which products and versions are affected?
- WP SYNTEX Polylang through 3.8.7.
- Is there a fix for CVE-2026-39783?
- 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-2026-39783 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-39783?
- Check whether you run WP SYNTEX Polylang 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
A missing authorization vulnerability in Polylang permits unauthorized retrieval of sensitive embedded data through an unauthenticated or inadequately authenticated request. The vulnerability affects Polylang versions up to 3.8.7, requiring no special privileges or user interaction to exploit via network access. An attacker can extract sensitive information without proper authorization checks.
Affected products
- WP SYNTEX Polylang through 3.8.7
Timeline
- 2026-10-05: disclosed