CVE-2023-4138: PYSEC-2026-1863 - RDiffWeb vulnerable to Allocation of Resources Without Limits or Throttling

CVE-2023-4138 · Severity: low · CVSS 3 · Published 2026-07-07

RDiffWeb vulnerable to Allocation of Resources Without Limits or Throttling

Technologies: rdiffweb (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2023-4138 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2023-4138 being exploited in the wild.
How severe is CVE-2023-4138?
Low severity, with a CVSS score of 3, published 7 July 2026.
Which products and versions are affected?
rdiffweb (PyPI) ECOSYSTEM:introduced=0,fixed=2.8.1.
Is there a fix for CVE-2023-4138?
Yes. rdiffweb (PyPI): upgrade to 2.8.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2023-4138?
Check whether you run rdiffweb (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • rdiffweb (PyPI): upgrade to 2.8.1 or later
    pip install "rdiffweb>=2.8.1"

Affected products

  • rdiffweb (PyPI) ECOSYSTEM:introduced=0,fixed=2.8.1

Identifiers

  • CVE-2023-4138
  • GHSA-wwrg-2w5j-grvx
  • PYSEC-2026-1863

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