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CVE-2025-66418VulnerabilityPublished Updated

Red Hat Security Advisory: Satellite 6.17.6.3 Async Update

Affects Red HatSource GCVE Database

0

Mentioned vulnerabilities

Not known to be exploited : upgrade to 2.0.0 soon.

Data as of 26 Oct 2026, 06:26 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.6% chance of exploitation in 30 days – higher than 52% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.0.0

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

What to do

Upgrade urllib3 to 2.0.0.

Affected software

ProductAffectedFixed in
PyPIurllib3pkg:pypi/urllib3Other threatsAffected
  • <2.0.0
Fixed in
  • 2.0.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

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.

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)

References

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