CVE-2026-59939 httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling
High 7.5
Published
Updated
Check this codebase for CVE-2026-59939 and fix it if it is affected.
What it is: CVE-2026-59939 is a high-severity vulnerability in httplib2, published on 8 Jul 2026.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59939 exists.
Affected packages and fixed versions:
- httplib2 (PyPI): affected all versions; fixed in 0.32.0
- httplib2 (PyPI): affected all versions; fixed in 0.32.0
- httplib2 (PyPI): affected all versions; fixed in 0.32.0
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-59939/ (Markdown: https://insights.sbomify.com/CVE-2026-59939/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-59939?
CVE-2026-59939 is a high-severity vulnerability in httplib2, published on 8 Jul 2026.
Official description
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.
Weakness: CWE-409
Which versions are affected by CVE-2026-59939?
3 open source packages ship an affected version, including httplib2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
httplib2 PyPI | All versions | 0.32.0 |
httplib2 PyPI | All versions | 0.32.0 |
httplib2 PyPI | All versions | 0.32.0 |
Linux distribution packages (37)
fence-agents-aliyun AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-all AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-amt-ws AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-apc AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-apc-snmp AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-aws AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-azure-arm AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-bladecenter AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-brocade AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-cisco-mds AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-cisco-ucs AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-common AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-drac5 AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-eaton-snmp AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-emerson AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-eps AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-gce AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-heuristics-ping AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-hpblade AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ibm-powervs AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ibm-vpc AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ibmblade AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ifmib AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ilo-moonshot AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ilo-mp AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ilo-ssh AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ilo2 AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-intelmodular AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ipdu AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-ipmilan AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-kdump AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-kubevirt AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-lpar AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-mpath AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-nutanix-ahv AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-openstack AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
fence-agents-redfish AlmaLinux:10 | All versions | 4.16.0-21.el10_2.5 |
Products include Httplib2 Project Httplib2.
How do I fix CVE-2026-59939?
Upgrade httplib2 to 0.32.0 or later.
Is CVE-2026-59939 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59939 exists.
Other vulnerabilities in httplib2
Sources
Also known as ALSA-2026:47736, ALSA-2026:48585, ALSA-2026:50317, AZL-92295, CLEANSTART-2026-HU27522, DEBIAN-CVE-2026-59939 and 28 more.