Quick answers
- Is CVE-2026-15567 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-15567 being exploited in the wild.
- How severe is CVE-2026-15567?
- High severity, with a CVSS score of 7.5, published 11 August 2026.
- Which products and versions are affected?
- Red Hat WildFly <UNKNOWN>.
- Is there a fix for CVE-2026-15567?
- 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-2026-15567 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-15567?
- Check whether you run Red Hat WildFly 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 unbounded memory allocation flaw in WildFly's CSIv2Util component, which handles GSS (Generic Security Service) token decoding for CORBA/CSI authentication. The vulnerable code reads an attacker-controlled length field from the incoming token without validating its bounds, then attempts to allocate a byte array of that size. An unauthenticated remote attacker can send a token with an extremely large length value to trigger an OutOfMemoryError, exhausting heap memory and crashing the server. The attack is network-reachable and requires no authentication or user interaction. A patch is expected from Red Hat.
Affected products
- Red Hat WildFly <UNKNOWN>
Timeline
- 2026-08-11: disclosed