Use-after-free in Apache bRPC - CVE-2026-84727
Published: October 23, 2026
Vulnerability identifier: #VU157363
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84727
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to crash a bRPC process or potentially corrupt its memory.
The vulnerability exists due to use-after-free in Apache bRPC's RTMP chunk stream handling when an Abort message deletes an object concurrently accessed by the send path without synchronization. A remote attacker can send an Abort message targeting a chunk stream being used to serialize an outgoing message to free the object while sender threads still dereference it, potentially crashing the process or corrupting memory.
Affected software
Apache bRPC
How to mitigate CVE-2026-84727
Install security update from vendor's website.
Apache bRPC - update to 1.18.0