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Fencer Vulns
high 7.5

CVE-2026-59939 json

httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling

published 2026-07-08 4 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-42364 , GHSA-j5g9-f88f-gfj3 , PYSEC-2026-3444

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 52%
public exploits
0
none known

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, 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.

Patch / fix

  • pypi httplib2 0.32.0
  • httplib2_project httplib2 0.32.0
  • python-httplib2 Debian 12 0.20.4-3+deb12u1
  • python-httplib2 Debian 13 0.22.0-1+deb13u1
  • python-httplib2 Debian 14 0.32.0-1

debian advisories DEBIAN-CVE-2026-59939

  • python-httplib2 Ubuntu 22.04 LTS 0.20.2-2ubuntu0.1
  • python-httplib2 Ubuntu 24.04 LTS 0.20.4-3ubuntu0.1
  • python-httplib2 Ubuntu 26.04 LTS 0.22.0-1ubuntu0.1

ubuntu advisories UBUNTU-CVE-2026-59939

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • fence-agents RHEL 9 4.10.0-110.el9_8.5
  • fence-virt RHEL 9 4.10.0-110.el9_8.5
  • fence-virtd RHEL 9 4.10.0-110.el9_8.5
  • fence-virtd-cpg RHEL 9 4.10.0-110.el9_8.5
  • fence-virtd-tcp RHEL 9 4.10.0-110.el9_8.5
  • fence-agents-all RHEL 9 4.10.0-110.el9_8.5
  • fence-agents-apc RHEL 9 4.10.0-110.el9_8.5
  • fence-agents-aws RHEL 9 4.10.0-110.el9_8.5

red hat advisories RHSA-2026:50655RHSA-2026:50653RHSA-2026:50654RHSA-2026:50317RHSA-2026:49911RHSA-2026:48585

  • python-httplib2 SLE Module for Public Cloud 15 SP5, SLE Module for Public Cloud 15 SP4 0.22.0-150400.10.7.1
  • python-httplib2 SLES 16.0, SLES for SAP applications 16.0 0.22.0-160000.3.1

suse advisories SUSE-SU-2026:3898-1SUSE-SU-2026:23120-1SUSE-SU-2026:23142-1

  • python-httplib2 openSUSE Leap 16.0 0.22.0-160000.3.1

opensuse advisories openSUSE-SU-2026:21526-1

  • fence-virt AlmaLinux 9 4.10.0-110.el9_8.5
  • fence-virtd AlmaLinux 9 4.10.0-110.el9_8.5
  • fence-virtd-cpg AlmaLinux 9 4.10.0-110.el9_8.5
  • fence-virtd-tcp AlmaLinux 9 4.10.0-110.el9_8.5
  • fence-agents-all AlmaLinux 9 4.10.0-110.el9_8.5
  • fence-agents-apc AlmaLinux 9 4.10.0-110.el9_8.5
  • fence-agents-aws AlmaLinux 9 4.10.0-110.el9_8.5
  • fence-agents-eps AlmaLinux 9 4.10.0-110.el9_8.5

almalinux advisories ALSA-2026:50317ALSA-2026:48585ALSA-2026:47736

  • fence-agents Rocky Linux 9 4.10.0-110.el9_8.5
  • fence-agents Rocky Linux 10 4.16.0-21.el10_2.5
  • fence-agents Rocky Linux 8 4.2.1-129.el8_10.27

rocky linux advisories RLSA-2026:50317RLSA-2026:48585RLSA-2026:47736

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-59939 updated cvss 7.5

httplib2: httplib2: Denial of Service via unbounded decompression of HTTP response bodies

  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-24/lightspeed-rhel8
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 7 fence-agents, fence-agents-all, fence-agents-apc, fence-agents-aws, fence-agents-eps, fence-agents-gce, +38 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Ansible Automation Platform 2.5 ansible-automation-platform-25/lightspeed-rhel8 1785430174
    fixed: vendor fix RHSA-2026:50357
  • Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/lightspeed-rhel9 1785775360
    fixed: vendor fix RHSA-2026:50479
  • Red Hat Ansible Automation Platform 2.7 ansible-automation-platform-27/lightspeed-rhel9 1785375273
    fixed: vendor fix RHSA-2026:50340
  • Red Hat Enterprise Linux AppStream (v. 8) fence-agents 4.2.1-129.el8_10.27, fence-agents-all 4.2.1-129.el8_10.27, fence-agents-apc 4.2.1-129.el8_10.27, fence-agents-eps 4.2.1-129.el8_10.27, fence-agents-rsa 4.2.1-129.el8_10.27, fence-agents-rsb 4.2.1-129.el8_10.27, +38 more
    fixed: vendor fix RHSA-2026:47736
  • Red Hat Enterprise Linux AppStream (v. 9) fence-virt 4.10.0-110.el9_8.5, fence-virtd 4.10.0-110.el9_8.5, fence-agents 4.10.0-110.el9_8.5, fence-virtd-cpg 4.10.0-110.el9_8.5, fence-virtd-tcp 4.10.0-110.el9_8.5, fence-agents-all 4.10.0-110.el9_8.5, +51 more
    fixed: vendor fix RHSA-2026:50317
  • Red Hat Enterprise Linux AppStream (v. 10) fence-virt 4.16.0-21.el10_2.5, fence-virtd 4.16.0-21.el10_2.5, fence-agents 4.16.0-21.el10_2.5, fence-virtd-cpg 4.16.0-21.el10_2.5, fence-virtd-tcp 4.16.0-21.el10_2.5, fence-agents-all 4.16.0-21.el10_2.5, +50 more
    fixed: vendor fix RHSA-2026:48585
show 24 more
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) fence-agents 4.2.1-65.el8_4.30, fence-agents-all 4.2.1-65.el8_4.30, fence-agents-apc 4.2.1-65.el8_4.30, fence-agents-eps 4.2.1-65.el8_4.30, fence-agents-rsa 4.2.1-65.el8_4.30, fence-agents-rsb 4.2.1-65.el8_4.30, +37 more
    fixed: vendor fix RHSA-2026:48615
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) fence-agents 4.2.1-89.el8_6.24, fence-agents-all 4.2.1-89.el8_6.24, fence-agents-apc 4.2.1-89.el8_6.24, fence-agents-eps 4.2.1-89.el8_6.24, fence-agents-rsa 4.2.1-89.el8_6.24, fence-agents-rsb 4.2.1-89.el8_6.24, +37 more
    fixed: vendor fix RHSA-2026:48604
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) fence-agents 4.2.1-112.el8_8.19, fence-agents-all 4.2.1-112.el8_8.19, fence-agents-apc 4.2.1-112.el8_8.19, fence-agents-eps 4.2.1-112.el8_8.19, fence-agents-rsa 4.2.1-112.el8_8.19, fence-agents-rsb 4.2.1-112.el8_8.19, +37 more
    fixed: vendor fix RHSA-2026:48605
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) fence-virt 4.10.0-43.el9_2.24, fence-virtd 4.10.0-43.el9_2.24, fence-agents 4.10.0-43.el9_2.24, fence-virtd-cpg 4.10.0-43.el9_2.24, fence-virtd-tcp 4.10.0-43.el9_2.24, fence-agents-virsh 4.10.0-43.el9_2.24, +8 more
    fixed: vendor fix RHSA-2026:50653
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) fence-virt 4.10.0-62.el9_4.27, fence-virtd 4.10.0-62.el9_4.27, fence-agents 4.10.0-62.el9_4.27, fence-virtd-cpg 4.10.0-62.el9_4.27, fence-virtd-tcp 4.10.0-62.el9_4.27, fence-agents-virsh 4.10.0-62.el9_4.27, +8 more
    fixed: vendor fix RHSA-2026:50655
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) fence-virt 4.16.0-5.el10_0.12, fence-virtd 4.16.0-5.el10_0.12, fence-agents 4.16.0-5.el10_0.12, fence-virtd-cpg 4.16.0-5.el10_0.12, fence-virtd-tcp 4.16.0-5.el10_0.12, fence-agents-all 4.16.0-5.el10_0.12, +50 more
    fixed: vendor fix RHSA-2026:49911
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) fence-virt 4.10.0-86.el9_6.19, fence-virtd 4.10.0-86.el9_6.19, fence-agents 4.10.0-86.el9_6.19, fence-virtd-cpg 4.10.0-86.el9_6.19, fence-virtd-tcp 4.10.0-86.el9_6.19, fence-agents-all 4.10.0-86.el9_6.19, +51 more
    fixed: vendor fix RHSA-2026:50654
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) fence-agents 4.2.1-65.el8_4.30, fence-agents-all 4.2.1-65.el8_4.30, fence-agents-apc 4.2.1-65.el8_4.30, fence-agents-eps 4.2.1-65.el8_4.30, fence-agents-rsa 4.2.1-65.el8_4.30, fence-agents-rsb 4.2.1-65.el8_4.30, +33 more
    fixed: vendor fix RHSA-2026:48615
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) fence-agents 4.2.1-89.el8_6.24, fence-agents-all 4.2.1-89.el8_6.24, fence-agents-apc 4.2.1-89.el8_6.24, fence-agents-eps 4.2.1-89.el8_6.24, fence-agents-rsa 4.2.1-89.el8_6.24, fence-agents-rsb 4.2.1-89.el8_6.24, +37 more
    fixed: vendor fix RHSA-2026:48604
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) fence-agents 4.2.1-112.el8_8.19, fence-agents-all 4.2.1-112.el8_8.19, fence-agents-apc 4.2.1-112.el8_8.19, fence-agents-eps 4.2.1-112.el8_8.19, fence-agents-rsa 4.2.1-112.el8_8.19, fence-agents-rsb 4.2.1-112.el8_8.19, +36 more
    fixed: vendor fix RHSA-2026:48605
  • Red Hat Enterprise Linux High Availability AUS (v.8.4) fence-agents-aws 4.2.1-65.el8_4.30, fence-agents-gce 4.2.1-65.el8_4.30, fence-agents-aliyun 4.2.1-65.el8_4.30, fence-agents-azure-arm 4.2.1-65.el8_4.30
    fixed: vendor fix RHSA-2026:48615
  • Red Hat Enterprise Linux High Availability E4S (v.8.8) fence-agents-aws 4.2.1-112.el8_8.19, fence-agents-gce 4.2.1-112.el8_8.19, fence-agents-aliyun 4.2.1-112.el8_8.19, fence-agents-azure-arm 4.2.1-112.el8_8.19, fence-agents-openstack 4.2.1-112.el8_8.19
    fixed: vendor fix RHSA-2026:48605
  • Red Hat Enterprise Linux High Availability E4S (v.9.2) fence-agents-all 4.10.0-43.el9_2.24, fence-agents-apc 4.10.0-43.el9_2.24, fence-agents-aws 4.10.0-43.el9_2.24, fence-agents-eps 4.10.0-43.el9_2.24, fence-agents-gce 4.10.0-43.el9_2.24, fence-agents-rsa 4.10.0-43.el9_2.24, +37 more
    fixed: vendor fix RHSA-2026:50653
  • Red Hat Enterprise Linux High Availability E4S (v.9.4) fence-agents-all 4.10.0-62.el9_4.27, fence-agents-apc 4.10.0-62.el9_4.27, fence-agents-aws 4.10.0-62.el9_4.27, fence-agents-eps 4.10.0-62.el9_4.27, fence-agents-gce 4.10.0-62.el9_4.27, fence-agents-rsa 4.10.0-62.el9_4.27, +37 more
    fixed: vendor fix RHSA-2026:50655
  • Red Hat Enterprise Linux High Availability EUS EXTENSION (v.8.6) fence-agents-aws 4.2.1-89.el8_6.24, fence-agents-gce 4.2.1-89.el8_6.24, fence-agents-aliyun 4.2.1-89.el8_6.24, fence-agents-azure-arm 4.2.1-89.el8_6.24
    fixed: vendor fix RHSA-2026:48604
  • Red Hat Enterprise Linux High Availability TUS (v.8.8) fence-agents-aws 4.2.1-112.el8_8.19, fence-agents-gce 4.2.1-112.el8_8.19, fence-agents-aliyun 4.2.1-112.el8_8.19, fence-agents-azure-arm 4.2.1-112.el8_8.19, fence-agents-openstack 4.2.1-112.el8_8.19
    fixed: vendor fix RHSA-2026:48605
  • Red Hat Enterprise Linux HighAvailability (v. 8) fence-agents-aws 4.2.1-129.el8_10.27, fence-agents-gce 4.2.1-129.el8_10.27, fence-agents-aliyun 4.2.1-129.el8_10.27, fence-agents-azure-arm 4.2.1-129.el8_10.27, fence-agents-openstack 4.2.1-129.el8_10.27
    fixed: vendor fix RHSA-2026:47736
  • Red Hat Enterprise Linux HighAvailability EUS EXTENSION (v.8.4) fence-agents-aws 4.2.1-65.el8_4.30, fence-agents-gce 4.2.1-65.el8_4.30, fence-agents-aliyun 4.2.1-65.el8_4.30, fence-agents-azure-arm 4.2.1-65.el8_4.30
    fixed: vendor fix RHSA-2026:48615
  • Red Hat Enterprise Linux Resilient Storage E4S (v.9.2) fence-agents-all 4.10.0-43.el9_2.24, fence-agents-apc 4.10.0-43.el9_2.24, fence-agents-aws 4.10.0-43.el9_2.24, fence-agents-eps 4.10.0-43.el9_2.24, fence-agents-gce 4.10.0-43.el9_2.24, fence-agents-rsa 4.10.0-43.el9_2.24, +36 more
    fixed: vendor fix RHSA-2026:50653
  • Red Hat Enterprise Linux Resilient Storage E4S (v.9.4) fence-agents-all 4.10.0-62.el9_4.27, fence-agents-apc 4.10.0-62.el9_4.27, fence-agents-aws 4.10.0-62.el9_4.27, fence-agents-eps 4.10.0-62.el9_4.27, fence-agents-gce 4.10.0-62.el9_4.27, fence-agents-rsa 4.10.0-62.el9_4.27, +36 more
    fixed: vendor fix RHSA-2026:50655
  • Red Hat Enterprise Linux ResilientStorage (v. 8) fence-agents-aws 4.2.1-129.el8_10.27, fence-agents-gce 4.2.1-129.el8_10.27, fence-agents-aliyun 4.2.1-129.el8_10.27, fence-agents-azure-arm 4.2.1-129.el8_10.27, fence-agents-openstack 4.2.1-129.el8_10.27
    fixed: vendor fix RHSA-2026:47736
  • Red Hat Migration Toolkit for Applications 8.2 mta/mta-solution-server-rhel9 1784109883
    fixed: vendor fix RHSA-2026:43038
  • Red Hat OpenShift AI 3.4 rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9 1791785804
    fixed: vendor fix RHSA-2026:84734
  • Red Hat Ansible Automation Platform 2.5 ansible-automation-platform-25/hub-rhel8 1785376274, ansible-automation-platform-25/gateway-rhel8 1785374193, ansible-automation-platform-25/hub-web-rhel8 1785456973, ansible-automation-platform-25/receptor-rhel8 1785373835, ansible-automation-platform-25/controller-rhel8 1785376834, ansible-automation-platform-25/de-minimal-rhel8 1785383359, +20 more Red Hat Ansible Automation Platform 2.6 ansible-automation-platform-26/hub-rhel9 1785753568, ansible-automation-platform-26/gateway-rhel9 1785780020, ansible-automation-platform-26/hub-web-rhel9 1785756951, ansible-automation-platform-26/receptor-rhel9 1785632117, ansible-automation-platform-26/mcp-tools-rhel9 1785633968, ansible-automation-platform-26/controller-rhel9 1785753810, +24 more Red Hat Ansible Automation Platform 2.7 ansible-automation-platform-27/hub-rhel9 1785376164, ansible-automation-platform-27/gateway-rhel9 1785435970, ansible-automation-platform-27/hub-web-rhel9 1785379466, ansible-automation-platform-27/receptor-rhel9 1785389482, ansible-automation-platform-27/mcp-tools-rhel9 1785374970, ansible-automation-platform-27/controller-rhel9 1785378052, +25 more Red Hat Hardened Images mariadb11.8 3:11.8.8-1.hum1 Red Hat Migration Toolkit for Applications 8.2 mta/mta-ui-rhel9 1783962515, mta/mta-cli-rhel9 1784211378, mta/mta-hub-rhel9 1784059743, mta/mta-rhel9-operator 1784219586, mta/mta-operator-bundle 1784220119, mta/mta-analyzer-addon-rhel9 1784163267, +7 more Red Hat OpenShift AI 3.4 rhoai/odh-cli-rhel9 1791509689, rhoai/rhai-cli-rhel9 1791509689, rhoai/odh-automl-rhel9 1791535789, rhoai/odh-mlflow-rhel9 1791865967, rhoai/odh-autorag-rhel9 1791557539, rhoai/odh-trainer-rhel9 1791869783, +99 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
4 mo ago

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 52% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/httplib2/httplib2/security/advisories/GHSA-j5g9-f88f-gfj3 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi httplib2
<0.32.0
0.32.0

Affected products

  • httplib2 httplib2

Classification

Weakness
  • CWE-409 Improper Handling of Highly Compressed Data (Data Amplification)
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.