CVE-2026-114550
HIGH 1 PoC
MEDIUM
Priority: 0.07
BB Relevance:
76/100
Published: 2026-11-04
Modified: 2026-11-12
First seen: 2026-11-04
Status: active
Attack Surface
Network
No Auth
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
High
PR:
None
UI:
None
S:
Unchanged
C:
High
I:
High
A:
High
Description
libwebsockets MQTT Protocol PUBACK Packet Handling Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of libwebsockets. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of PUBACK packets. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31039.
Weakness Classification (1)
Affected Software (2)
| Vendor | Product | Version |
|---|---|---|
| libwebsockets | libwebsockets | b4b5aed3903eaff09cd76a410f69bbe5dff66f8e |
| libwebsockets | libwebsockets | b4b5aed3903eaff09cd76a410f69bbe5dff66f8e |
References & Advisories (2)
x_research-advisory
vendor-advisory