CVE-2026-8741 EMQX QoS 2 PUBLISH Packet emqx_persistent_session_ds.erl race condition
A race condition in EMQX's QoS 2 PUBLISH handler allows remote attackers to cause denial of service, requiring high complexity and difficult exploitation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8741?
CVE-2026-8741 is a low-severity vulnerability in EMQX, published on 17 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability has been found in EMQX up to 6.2.0. This affects an unknown function of the file apps/emqx/src/emqx_persistent_session_ds.erl of the component QoS 2 PUBLISH Packet Handler. Such manipulation leads to race condition. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is reported as difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure.
Weakness: CWE-362
Which versions are affected by CVE-2026-8741?
It affects 1 product.
Products include Emqx Emqx.
How do I fix CVE-2026-8741?
No fix has been published for CVE-2026-8741 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-8741 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8741 exists.
Other vulnerabilities in EMQX
Sources
Also known as GHSA-48p2-hcwr-rx4q.