CVE-2026-59939CWE-409

CVE-2026-59939

High · published July 9, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
51.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00665 · 51.2th percentile
Weakness
CWE-409 · Improper Handling of Highly Compressed Data (Data Amplification)
Published
2026-07-09T00:16Z
Affected products (1)
ProductVersionsFixed in
httplib2_project/httplib2< 0.32.00.32.0
References (5)
EPSS history
Timeline
  • 08 JUL 19:34Z
    httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling
    cvelistv5