Quick answers
- Is CVE-2026-92037 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-92037 being exploited in the wild.
- How severe is CVE-2026-92037?
- Critical severity, with a CVSS score of 9.8, published 15 September 2026.
- Which products and versions are affected?
- Mozilla Firefox before 156; Mozilla Thunderbird before 156.
- Is there a fix for CVE-2026-92037?
- A patch was published on 2026-09-15: Fixed in Firefox 156 and Thunderbird 156 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-92037 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-92037?
- Check whether you run Mozilla Firefox or Mozilla Thunderbird 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
This vulnerability involves incorrect boundary conditions in the DOM: Animation component, allowing a boundary condition to be exploited. The vulnerability can be triggered through network vectors without requiring authentication. An attacker can achieve privilege escalation through boundary condition bypass. The issue has been patched in Firefox 156 and Thunderbird 156.
Affected products
- Mozilla Firefox before 156
- Mozilla Thunderbird before 156
Timeline
- 2026-09-15: disclosed: CVE-2026-92037 published
- 2026-09-15: patched: Fixed in Firefox 156 and Thunderbird 156