Resource exhaustion in gRPC - #VU146760
Published: September 2, 2026
Vulnerability identifier: #VU146760
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: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in HTTP/2 DATA frame handling when fragmenting stream payloads into many tiny frames. A remote attacker can initiate a gRPC stream and send payload data fragmented into many tiny HTTP/2 DATA frames to cause a denial of service.
An attacker can amplify memory consumption further by multiplexing multiple concurrent streams.
Affected software
gRPC
Remediation
Install security update from vendor's website.
gRPC - addressed in versions 1.82.2, 1.83.1