CVE-2025-4600 — HTTP Request Smuggling in Google Cloud Classic Application Load Balancer due to Improper Chunked Encoding Validation

CVE-2025-4600

HTTP Request Smuggling in Google Cloud Classic Application Load Balancer due to Improper Chunked Encoding Validation PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Google Cloud / Classic Application Load Balancer	affected 0

CWE

CWE-444

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.