CVE-2026-26447

Stomper 5e2741e is vulnerable to Use-After-Free. When a single client repeatedly issues SUBSCRIBE...

7.5 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.49%Up 0.3 points since Aug 27, 2026

What each source reports

CVE List Score used 7.5

Record: CVE-2026-26447
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-416
Updated: 2026-11-02

EUVDEUVD-2026-66754 7.5

Record: EUVD-2026-66754
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-3h57-jwg8-vm79 7.5

Stomper 5e2741e is vulnerable to Use-After-Free. When a single client repeatedly issues SUBSCRIBE...

Record: GHSA-3h57-jwg8-vm79
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-416
Updated: 2026-11-02

NVD 7.5

Record: CVE-2026-26447
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-416
Updated: 2026-11-02

OSV 7.5

Record: CVE-2026-26447
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-26447 7.5

Record: UBUNTU-CVE-2026-26447
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected packages

Affected packages
Package	Affected	Fixed
`stomper` Ubuntu:16.04:LTS	All versions, plus listed versions 0.3.0-1	None known
`stomper` Ubuntu:18.04:LTS	All versions, plus listed versions 0.3.0-1	None known
`stomper` Ubuntu:20.04:LTS	All versions, plus listed versions 0.4.1-2	None known
`stomper` Ubuntu:22.04:LTS	All versions, plus listed versions 0.4.1-20.4.3-1	None known
`stomper` Ubuntu:24.04:LTS	All versions, plus listed versions 0.4.3-20.4.3-3	None known
`stomper` Ubuntu:26.10	All versions, plus listed versions 0.4.3-3build1	None known
`stomper` Ubuntu:26.04:LTS	All versions, plus listed versions 0.4.3-30.4.3-3build1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-26447 is a high vulnerability (CVSS 7.5) in stomper, published August 26, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.49%, the 42nd percentile. No source names a fixed version.