RHSA-2026:1240 — Security Advisory
Red Hat Security Advisory: fence-agents security update
Severity
ImportantRed Hat Product Security
Products
Official CSAF product identity
Published · January 27, 2026
Updated · November 4, 2026
Topic
An update for fence-agents is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable nodes to be forcibly restarted and removed from the cluster.
Security Fix(es):
-
urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion (CVE-2025-66418)
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urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471)
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urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) (CVE-2026-21441)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.