Allocation of Resources Without Limits or Throttling Affecting python3-urllib3 package, versions <1.25.10-150300.4.33.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.34% (26th percentile)

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  • Snyk IDSNYK-SLES156-PYTHON3URLLIB3-20968533
  • published15 Oct 2026
  • disclosed13 Oct 2026

Introduced: 13 Oct 2026

NewCVE-2026-97689  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 python3-urllib3 to version 1.25.10-150300.4.33.1 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:15.6 relevant fixed versions and status.

urllib3 is an HTTP client library for Python. From 1.10.3 until 2.8.0, the HTTPResponse.read_chunked and HTTPResponse.stream methods can allocate unbounded memory because the streaming chunk parser buffers the chunk-size field until newline or EOF without a length bound. The trigger is that a malicious server returns Transfer-Encoding: chunked followed by a very long run of bytes without a newline. The attack mechanism is that a malicious HTTP server sends a very long unterminated chunk-size line. The impact is that unbounded memory allocation can exhaust the client process. This issue is fixed in version 2.8.0.

CVSS Base Scores

version 3.1