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  5. CVE-2024-35195

CVE-2024-35195: Requests `Session` object does not verify requests after making first request with verify=False

May 20, 2024 (updated January 16, 2026)

When using a requests.Session, if the first request to a given origin is made with verify=False, TLS certificate verification may remain disabled for all subsequent requests to that origin, even if verify=True is explicitly specified later.

This occurs because the underlying connection is reused from the session’s connection pool, causing the initial TLS verification setting to persist for the lifetime of the pooled connection. As a result, applications may unintentionally send requests without certificate verification, leading to potential man-in-the-middle attacks and compromised confidentiality or integrity.

This behavior affects versions of requests prior to 2.32.0.

References

  • github.com/advisories/GHSA-9wx4-h78v-vm56
  • github.com/psf/requests
  • github.com/psf/requests/commit/a58d7f2ffb4d00b46dca2d70a3932a0b37e22fac
  • github.com/psf/requests/pull/6655
  • github.com/psf/requests/security/advisories/GHSA-9wx4-h78v-vm56
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IYLSNK5TL46Q6XPRVMHVWS63MVJQOK4Q
  • lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7WP6EYDSUOCOJYHDK5NX43PYZ4SNHGZ
  • nvd.nist.gov/vuln/detail/CVE-2024-35195

Code Behaviors & Features

Detect and mitigate CVE-2024-35195 with GitLab Dependency Scanning

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Affected versions

All versions before 2.32.0

Fixed versions

  • 2.32.0

Solution

Upgrade to version 2.32.0 or above.

Impact 5.6 MEDIUM

CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N

Learn more about CVSS

Weakness

  • CWE-670: Always-Incorrect Control Flow Implementation

Source file

pypi/requests/CVE-2024-35195.yml

Spotted a mistake? Edit the file on GitLab.

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