CVE-2026-26448 Use after free in n/a
An attacker can crash the Stomp message broker by sending specific frame sequences, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-26448?
CVE-2026-26448 is a critical use after free vulnerability in n/a, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Stomper 5e2741e is vulnerable to Use-After-Free. When a client sends multiple CONNECT frames on the same TCP connection, and subsequently another client (or a later connection) sends SEND frames to a destination previously subscribed on that connection, the broker may dereference a pointer to a StompStreamSocket object that has already been freed. This results in a heap use-after-free and process crash. Because the protocol does not authenticate or restrict such sequences by default.
Weakness: CWE-416
Which versions are affected by CVE-2026-26448?
How do I fix CVE-2026-26448?
No fix has been published for CVE-2026-26448 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-26448 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26448 exists.
Sources
Also known as GHSA-m2x8-gg52-7xpc, UBUNTU-CVE-2026-26448.