CVE-2026-59939 HIGH

CVE-2026-59939: httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling

Vendor Httplib2
Product httplib2
Weakness CWE-409
Published July 8, 2026
Last update July 10, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

httplib2 is a comprehensive HTTP client library for Python. Prior to 0.32.0, httplib2 performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate in _decompressContent in httplib2/init.py, allowing a malicious or compromised HTTP server to return a small compressed payload that expands to an arbitrarily large size in memory and causes MemoryError or OOM-kill in the client process. This issue is fixed in version 0.32.0.

Key dates

02Disclosure timeline

July 8, 2026 CVE published
July 10, 2026 Record updated