Allocation of Resources Without Limits or Throttling Affecting python311-urllib3_1 package, versions <1.26.18-150600.3.6.1


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-PYTHON311URLLIB31-15353551
  • published26 Feb 2026
  • disclosed25 Feb 2026

Introduced: 25 Feb 2026

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

How to fix?

Upgrade SLES:15.7 python311-urllib3_1 to version 1.26.18-150600.3.6.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python311-urllib3_1 package and not the python311-urllib3_1 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