Red Hat Security Advisory: fence-agents security update
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 Streaming API improperly handles highly compressed data (CVE-2025-66471) * 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.
AI Analysis
Technical Summary
The fence-agents packages provide scripts for remote power management in cluster devices, enabling forced restart and removal of failed or unreachable nodes. This advisory fixes two security issues in the urllib3 Streaming API used by fence-agents: CVE-2025-66471 involves improper handling of highly compressed data, and CVE-2026-21441 involves a bypass of the decompression-bomb safeguard when following HTTP redirects. Both vulnerabilities relate to potential improper processing of compressed HTTP data streams. The advisory applies to Red Hat Enterprise Linux 9.6 Extended Update Support and related variants. Red Hat has released updated fence-agents packages to address these issues.
Potential Impact
The vulnerabilities affect the urllib3 Streaming API used by fence-agents, potentially allowing improper handling of compressed data and bypassing decompression safeguards. This could lead to resource exhaustion or denial of service conditions in cluster management scenarios where fence-agents are used to manage node power states. The advisory rates the impact as Important, indicating a significant security concern but not critical. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated fence-agents packages for Red Hat Enterprise Linux 9.6 Extended Update Support that address these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:1706 and the referenced update article (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated beyond applying the official patch.
Red Hat Security Advisory: fence-agents security update
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 Streaming API improperly handles highly compressed data (CVE-2025-66471) * 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.
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The fence-agents packages provide scripts for remote power management in cluster devices, enabling forced restart and removal of failed or unreachable nodes. This advisory fixes two security issues in the urllib3 Streaming API used by fence-agents: CVE-2025-66471 involves improper handling of highly compressed data, and CVE-2026-21441 involves a bypass of the decompression-bomb safeguard when following HTTP redirects. Both vulnerabilities relate to potential improper processing of compressed HTTP data streams. The advisory applies to Red Hat Enterprise Linux 9.6 Extended Update Support and related variants. Red Hat has released updated fence-agents packages to address these issues.
Potential Impact
The vulnerabilities affect the urllib3 Streaming API used by fence-agents, potentially allowing improper handling of compressed data and bypassing decompression safeguards. This could lead to resource exhaustion or denial of service conditions in cluster management scenarios where fence-agents are used to manage node power states. The advisory rates the impact as Important, indicating a significant security concern but not critical. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated fence-agents packages for Red Hat Enterprise Linux 9.6 Extended Update Support that address these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:1706 and the referenced update article (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated beyond applying the official patch.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:1706
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-21441"]
Threat ID: 6a16096ce29bf47b50632ab1
Added to database: 05/26/2026, 20:58:20 UTC
Last enriched: 08/10/2026, 17:48:59 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 74
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