Reachable assertion in Apache bRPC - CVE-2026-82210
Published: October 23, 2026
Vulnerability identifier: #VU157357
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-82210
CWE-ID: CWE-617
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by terminating a bRPC server process.
The vulnerability exists due to reachable assertions in Apache bRPC's streaming feedback handling when a feedback frame contains an unexpected payload or reaches a stream with flow control disabled. A remote attacker can establish a stream and send a malformed FRAME_TYPE_FEEDBACK frame to trigger CHECK(_cur_buf_size > 0) or CHECK(buf.IsEmpty()) and abort the server process.
Affected software
Apache bRPC
How to mitigate CVE-2026-82210
Install security update from vendor's website.
Apache bRPC - update to 1.18.0