---
id: CVE-2026-59939
title: httplib2 is a comprehensive HTTP client library for Python
summary: >-
  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,
  allo…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-409
vendor: httplib2_project
product: httplib2
affected:
  - httplib2 < 0.32.0
patched:
  - httplib2 0.32.0
published: '2026-07-08'
updated: '2026-07-13'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59939'
references:
  - url: >-
      https://github.com/httplib2/httplib2/commit/87581ad6cf752fe3da2090c59058261d2d00a427
    label: security-advisories@github.com
  - url: 'https://github.com/httplib2/httplib2/releases/tag/v0.32.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3
    label: security-advisories@github.com
  - url: >-
      https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59939'
  - url: 'https://github.com/httplib2/httplib2'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/httplib2/PYSEC-2026-3444.yaml
  - url: 'https://lists.debian.org/debian-lts-announce/2026/08/msg00039.html'
tags:
  - nvd
  - osv
  - pip
epss: 0.00665
epssPercentile: 0.4968
ingestedAt: '2026-07-13T13:27:18.209Z'
aliases:
  - GHSA-j5g9-f88f-gfj3
  - PYSEC-2026-3444
ecosystem: pip
---

## Overview

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.

## Affected

- `httplib2 < 0.32.0`

## Remediation

Upgrade past the affected range:

- `httplib2 0.32.0`

## Package advisory (CVE-2026-59939)

Affected packages:

- `httplib2 < 0.32.0`

Patched in:

- `httplib2 0.32.0`

Source: https://osv.dev/vulnerability/GHSA-j5g9-f88f-gfj3