Vulnerability · Published Aug 26, 2026 · Assigned by mitre
CVE-2026-26447
High 7.5
In plain English
A high-severity use-after-free in the stomper package (Ubuntu). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).
Official description
Stomper 5e2741e is vulnerable to Use-After-Free. When a single client repeatedly issues SUBSCRIBE commands for the same destination over one connection and then closes that connection, the broker performs incorrect cleanup of its internal subscription structures. This results in a heap use-after-free during StompClient destruction, causing the broker process to crash. An unauthenticated client can exploit this to reliably trigger a denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | stomper | no fix listed | UBUNTU-CVE-2026-26447 |
| Ubuntu:24.04:LTS | stomper | no fix listed | UBUNTU-CVE-2026-26447 |
| Ubuntu:26.04:LTS | stomper | no fix listed | UBUNTU-CVE-2026-26447 |
| Ubuntu:26.10 | stomper | no fix listed | UBUNTU-CVE-2026-26447 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H