High [CVE-2026-59939] Denial of Service via unbounded decompression of HTTP response bodies
This high-severity Red Hat Linux advisory covers CVE-2026-59939 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
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. This unbounded decompression can lead to a Denial of Service (DoS) by causing the client application to run out of memory and crash.
This Important vulnerability in `httplib2` allows a remote attacker to trigger a Denial of Service (DoS) in client applications. By sending a specially crafted, compressed HTTP response, a malicious server can cause the client to exhaust its memory due to unbounded decompression, leading to application crashes.
This poses a significant risk to Red Hat products that use `httplib2` to process untrusted HTTP content. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-409.
Is CVE-2026-59939 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-59939 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-59939?
Upgrade to a fixed release named by Red Hat:
- 0.32.0
- fence-agents-0:4.16.0-21.el10_2.5
- fence-agents-0:4.16.0-5.el10_0.12
- fence-agents-0:4.2.1-129.el8_10.27
- fence-agents-0:4.2.1-65.el8_4.30
- fence-agents-0:4.2.1-89.el8_6.24
- fence-agents-0:4.2.1-112.el8_8.19
- fence-agents-0:4.10.0-110.el9_8.5
- fence-agents-0:4.10.0-43.el9_2.24
- fence-agents-0:4.10.0-62.el9_4.27
- fence-agents-0:4.10.0-86.el9_6.19
- ansible-automation-platform-25/lightspeed-rhel8:1785430174
19 more fixed releases are listed below.
Confirm against the vendor advisory before you patch.
- < 0.32.0
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
- 0.32.0
- fence-agents-0:4.16.0-21.el10_2.5
- fence-agents-0:4.16.0-5.el10_0.12
- fence-agents-0:4.2.1-129.el8_10.27
- fence-agents-0:4.2.1-65.el8_4.30
- fence-agents-0:4.2.1-89.el8_6.24
- fence-agents-0:4.2.1-112.el8_8.19
- fence-agents-0:4.10.0-110.el9_8.5
- fence-agents-0:4.10.0-43.el9_2.24
- fence-agents-0:4.10.0-62.el9_4.27
- fence-agents-0:4.10.0-86.el9_6.19
- ansible-automation-platform-25/lightspeed-rhel8:1785430174
- ansible-automation-platform-26/lightspeed-rhel9:1785775360
- ansible-automation-platform-27/lightspeed-rhel9:1785375273
- mta/mta-solution-server-rhel9:1784109883
- rhoai/odh-trustyai-garak-lls-provider-dsp-rhel9:1791785804
- RHSA-2026:48585
- RHSA-2026:49911
- RHSA-2026:47736
- RHSA-2026:48615
- RHSA-2026:48604
- RHSA-2026:48605
- RHSA-2026:50317
- RHSA-2026:50653
- RHSA-2026:50655
- RHSA-2026:50654
- RHSA-2026:50357
- RHSA-2026:50479
- RHSA-2026:50340
- RHSA-2026:43038
- RHSA-2026:84734
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 11 days ago·verify at source
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