# CVE-2026-12977: WildFly Core deployment handler privilege escalation

Source: https://junglewise.ai/threats/cve-2026-12977-a-flaw-was-found-in-the-deployment-operation-family-of-wildfly  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-09. Updated: 2026-11-09  
License: CC BY 4.0 with a link back

CVE-2026-12977 · Severity: high · CVSS 8.8 · Published 2026-11-09

WildFly Core is a Java application server used to run enterprise applications. A flaw in deployment handlers allows administrators with the restricted "Maintainer" role to read sensitive configuration files and obtain full administrative access to the server, potentially exposing credentials and enabling complete system compromise.

Technologies: [Red Hat WildFly Core](https://junglewise.ai/threats/technologies/wildfly-core). Vendors: [Red Hat](https://junglewise.ai/threats/vendors/red-hat).

## 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

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/jbossnetwork/restricted/listSoftware.html](https://access.redhat.com/jbossnetwork/restricted/listSoftware.html)

## Related threats

- [WildFly and JBoss EAP path traversal in ContentRepositoryImpl](https://junglewise.ai/threats/cve-2026-85634-a-flaw-was-found-in-the-contentrepositoryimpl-copyexplodedcontent)
- [Red Hat WildFly Core malicious archive deployment](https://junglewise.ai/threats/cve-2026-24330-red-hat-wildfly-core-malicious-archive-deployment)
- [Red Hat WildFly Core denial of service via malformed Inet Address injection](https://junglewise.ai/threats/cve-2026-24329-red-hat-wildfly-core-denial-of-service-via-malformed-inet-address)
- [Red Hat Wildfly Elytron improper authentication restriction in CLI](https://junglewise.ai/threats/red-hat-wildfly-elytron-improper-authentication-restriction-in-cli-a6eae584)