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.
Published: 2025-05-16
Score: 8.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories
Source ID Title
EUVD EUVD EUVD-2025-15449 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.
History

Mon, 08 Sep 2025 10:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Mon, 08 Sep 2025 10:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-444

Tue, 29 Jul 2025 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Google
Google application Load Balancer
CPEs cpe:2.3:a:google:application_load_balancer:*:*:*:*:*:*:*:*
Vendors & Products Google
Google application Load Balancer
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}


Fri, 16 May 2025 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 16 May 2025 14:00:00 +0000

Type Values Removed Values Added
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.
Title HTTP Request Smuggling in Google Cloud Classic Application Load Balancer due to Improper Chunked Encoding Validation
Weaknesses CWE-20
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:L/SA:L'}


Subscriptions

Google Application Load Balancer
cve-icon MITRE

Status: PUBLISHED

Assigner: Google

Published:

Updated: 2025-09-08T09:48:16.572Z

Reserved: 2025-05-12T17:25:11.459Z

Link: CVE-2025-4600

cve-icon Vulnrichment

Updated: 2025-05-16T14:54:18.102Z

cve-icon NVD

Status : Analyzed

Published: 2025-05-16T14:15:32.580

Modified: 2025-09-26T17:18:42.847

Link: CVE-2025-4600

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses