Quick answers
- Is CVE-2026-12977 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-12977 being exploited in the wild.
- How severe is CVE-2026-12977?
- High severity, with a CVSS score of 8.8, published 9 November 2026.
- Which products and versions are affected?
- Red Hat WildFly Core.
- Is there a fix for CVE-2026-12977?
- 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-2026-12977 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-12977?
- Check whether you run Red Hat WildFly Core. 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 deployment-operation family of handlers in WildFly Core, including upload-deployment-url, lack proper sensitivity classification, allowing privilege escalation. A Maintainer-role administrator can exploit this to read restricted configuration files, extract credentials, and gain SuperUser access. The vulnerability requires administrative access but allows a lower-privileged admin role to exceed their intended permissions.
Affected products
- Red Hat WildFly Core
Timeline
- 2026-11-09: disclosed