CVE-2025-4600

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A request smuggling vulnerability existed in the Google Cloud Classic Application Load Balancer due to improper handling of chunked-encoded HTTP requests. This allowed attackers to craft requests that could be misinterpreted by backend servers. The issue was fixed by disallowing stray data after a chunk, and is no longer exploitable. No action is required as Classic Application Load Balancer service after 2025-04-26 is not vulnerable.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-444

Affected software

Vendor	Product	Versions
Google Cloud	Classic Application Load Balancer	0

References

https://cloud.google.com/support/bulletins#gcp-2025-027Vendor Advisory

Timeline

Published: May 16, 2025
Last modified: Jun 17, 2026
NVD status: Analyzed

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