Allocation of Resources Without Limits or Throttling Affecting python3-urllib3 package, versions <1.25.10-150300.4.21.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.68% (50th percentile)

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  • Snyk IDSNYK-SLES157-PYTHON3URLLIB3-15269073
  • published12 Feb 2026
  • disclosed11 Feb 2026

Introduced: 11 Feb 2026

CVE-2025-66418  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 python3-urllib3 to version 1.25.10-150300.4.21.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-urllib3 package and not the python3-urllib3 package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0.

CVSS Base Scores

version 3.1