CVE-2024-7765

Description

In h2oai/h2o-3 version 3.46.0.2, a vulnerability exists where uploading and repeatedly parsing a large GZIP file can cause a denial of service. The server becomes unresponsive due to memory exhaustion and a large number of concurrent slow-running jobs. This issue arises from the improper handling of highly compressed data, leading to significant data amplification.

CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-409 CWE-409

Affected Products

Vendor	Product	Versions
h2o	h2o	All

References

Exploits

https://huntr.com/bounties/0e58b1a5-bdca-4e60-af92-09de9c76a9ff https://huntr.com/bounties/0e58b1a5-bdca-4e60-af92-09de9c76a9ff

Frequently Asked Questions

What is CVE-2024-7765? +

In h2oai/h2o-3 version 3.46.0.2, a vulnerability exists where uploading and repeatedly parsing a large GZIP file can cause a denial of service. The server becomes unresponsive due to memory exhaustion and a large number of concurrent slow-running jobs. This issue arises from the improper handling of highly compressed data, leading to significant data amplification. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-7765? +

CVE-2024-7765 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-7765? +

CVE-2024-7765 affects products from h2o, specifically: h2o. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-7765? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-66019

pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can …

CVE-2026-43970

Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in ninenines cowlib allows unauthenticated remote denial of service via memory …

CVE-2025-62708 7.5

pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can …

CVE-2025-58057 7.5

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In …

CVE-2024-43499 7.5

.NET and Visual Studio Denial of Service Vulnerability

CVE-2025-66471 7.5

urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.0 and prior to 2.6.0, the Streaming API …