Quick answers
- Is CVE-2026-72549 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-72549 being exploited in the wild.
- How severe is CVE-2026-72549?
- Medium severity, with a CVSS score of 5.3, published 11 August 2026.
- Which products and versions are affected?
- OpenSignLabs OpenSign through 2.37.0.
- Is there a fix for CVE-2026-72549?
- 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-2026-72549 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-72549?
- Check whether you run OpenSignLabs OpenSign 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 an information disclosure flaw in the getUserId Parse cloud function within OpenSign through version 2.37.0. The function lacks authentication checks and directly returns internal user objectIds when queried with an email address or username. An unauthenticated remote attacker can exploit this via network access to the Parse cloud function to enumerate valid user accounts. The exposed objectIds can be leveraged as identifiers for subsequent targeted attacks. A patch addressing authentication enforcement in this function is expected in a future release.
Affected products
- OpenSignLabs OpenSign through 2.37.0
Timeline
- 2026-08-11: disclosed