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 in Red Hat Enterprise Linux 9.4 EUS provide scripts for remote power management of cluster devices, enabling forced restart and removal of failed or unreachable nodes. Two security issues in the urllib3 Streaming API are fixed: CVE-2025-66471, where highly compressed data is improperly handled, and CVE-2026-21441, where the decompression-bomb safeguard can be bypassed when following HTTP redirects. These vulnerabilities could potentially impact the reliability and security of cluster node management. The advisory references updated fence-agents packages that address these flaws.
Potential Impact
The vulnerabilities affect the urllib3 Streaming API used by fence-agents, potentially allowing improper handling of compressed data and bypassing decompression-bomb safeguards. This could lead to resource exhaustion or denial of service conditions in cluster management operations. The advisory rates the impact as Important (high severity). 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 9.4 Extended Update Support that fix these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:1717 and the referenced 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 in Red Hat Enterprise Linux 9.4 EUS provide scripts for remote power management of cluster devices, enabling forced restart and removal of failed or unreachable nodes. Two security issues in the urllib3 Streaming API are fixed: CVE-2025-66471, where highly compressed data is improperly handled, and CVE-2026-21441, where the decompression-bomb safeguard can be bypassed when following HTTP redirects. These vulnerabilities could potentially impact the reliability and security of cluster node management. The advisory references updated fence-agents packages that address these flaws.
Potential Impact
The vulnerabilities affect the urllib3 Streaming API used by fence-agents, potentially allowing improper handling of compressed data and bypassing decompression-bomb safeguards. This could lead to resource exhaustion or denial of service conditions in cluster management operations. The advisory rates the impact as Important (high severity). 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 9.4 Extended Update Support that fix these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:1717 and the referenced 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-2026:1717
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-21441"]
Threat ID: 6a16096ce29bf47b50632aa2
Added to database: 05/26/2026, 20:58:20 UTC
Last enriched: 08/10/2026, 17:49:18 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 45
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