Resource exhaustion in envoy - CVE-2026-48044
Published: June 24, 2026
Vulnerability identifier: #VU135112
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-2026-48044
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 improper control of resource consumption in ZstdDecompressorImpl when processing a specially crafted highly compressed zstd payload. A remote attacker can send a specially crafted compressed request body to cause a denial of service.
Only Envoy instances with zstd decompression enabled are vulnerable. The issue can lead to severe memory exhaustion and out-of-memory termination.
Affected software
envoy
How to mitigate CVE-2026-48044
Install security update from vendor's website.
envoy - addressed in versions 1.35.12, 1.36.8, 1.37.4, 1.38.2