Red Hat Security Advisory: Satellite 6.17.6.3 Async Update
Red Hat Satellite is a system management solution that allows organizations to configure and maintain their systems without the necessity to provide public Internet access to their servers or other client systems. It performs provisioning and configuration management of predefined standard operating environments. Security Fix(es): * python-urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471) * python-urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) (CVE-2026-21441) * python-urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion (CVE-2025-66418) Bug Fix(es): * Satellite upgrade from 6.17.5 to 6.18 failed during Pulpcore database migration due to incompatible versions detected for some of the pulpcore plugins (SAT-41761)
AI Analysis
Technical Summary
This advisory covers three security vulnerabilities in the python-urllib3 library used by Red Hat Satellite 6.17 for RHEL 9. CVE-2025-66418 describes an unbounded decompression chain that can lead to resource exhaustion. CVE-2025-66471 involves improper handling of highly compressed data in the streaming API. CVE-2026-21441 details a decompression-bomb safeguard bypass when following HTTP redirects in the streaming API. These flaws could be exploited to exhaust system resources. The advisory also includes a bug fix for upgrade failures due to incompatible Pulpcore plugin versions. The update to Satellite 6.17.6.3 resolves these issues.
Potential Impact
The vulnerabilities in urllib3 can lead to resource exhaustion on affected systems, potentially causing denial of service conditions. This impacts the stability and availability of Red Hat Satellite deployments using vulnerable versions. No known exploits in the wild have been reported. The bug fix improves upgrade reliability for Satellite.
Mitigation Recommendations
A patch is available in Red Hat Satellite 6.17.6.3 that addresses these vulnerabilities. Users should apply this update after ensuring all prior relevant errata have been installed. Detailed update instructions are provided by Red Hat in their official documentation. No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: Satellite 6.17.6.3 Async Update
Description
Red Hat Satellite is a system management solution that allows organizations to configure and maintain their systems without the necessity to provide public Internet access to their servers or other client systems. It performs provisioning and configuration management of predefined standard operating environments. Security Fix(es): * python-urllib3: urllib3 Streaming API improperly handles highly compressed data (CVE-2025-66471) * python-urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API) (CVE-2026-21441) * python-urllib3: urllib3: Unbounded decompression chain leads to resource exhaustion (CVE-2025-66418) Bug Fix(es): * Satellite upgrade from 6.17.5 to 6.18 failed during Pulpcore database migration due to incompatible versions detected for some of the pulpcore plugins (SAT-41761)
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers three security vulnerabilities in the python-urllib3 library used by Red Hat Satellite 6.17 for RHEL 9. CVE-2025-66418 describes an unbounded decompression chain that can lead to resource exhaustion. CVE-2025-66471 involves improper handling of highly compressed data in the streaming API. CVE-2026-21441 details a decompression-bomb safeguard bypass when following HTTP redirects in the streaming API. These flaws could be exploited to exhaust system resources. The advisory also includes a bug fix for upgrade failures due to incompatible Pulpcore plugin versions. The update to Satellite 6.17.6.3 resolves these issues.
Potential Impact
The vulnerabilities in urllib3 can lead to resource exhaustion on affected systems, potentially causing denial of service conditions. This impacts the stability and availability of Red Hat Satellite deployments using vulnerable versions. No known exploits in the wild have been reported. The bug fix improves upgrade reliability for Satellite.
Mitigation Recommendations
A patch is available in Red Hat Satellite 6.17.6.3 that addresses these vulnerabilities. Users should apply this update after ensuring all prior relevant errata have been installed. Detailed update instructions are provided by Red Hat in their official documentation. No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:2764
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-66471","CVE-2026-21441"]
Threat ID: 6a160972e29bf47b5063a969
Added to database: 05/26/2026, 20:58:26 UTC
Last enriched: 08/17/2026, 17:44:25 UTC
Last updated: 09/10/2026, 22:04:10 UTC
Views: 82
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