Requests `Session` object does not verify requests after making first request with verify=False
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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-35195US | — | — | ||
Requests is a HTTP library. Prior to 2.32.0, when making requests through a Requests `Session`, if the first request is made with `verify=False` to disable cert verification, all s… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-9wx4-h78v-vm56ADVISORY
- https://github.com/psf/requestsPACKAGE
- https://github.com/psf/requests/commit/a58d7f2ffb4d00b46dca2d70a3932a0b37e22facFIX
- https://github.com/psf/requests/pull/6655WEB
- https://github.com/psf/requests/security/advisories/GHSA-9wx4-h78v-vm56WEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/IYLSNK5TL46Q6XPRVMHVWS63MVJQOK4QWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7WP6EYDSUOCOJYHDK5NX43PYZ4SNHGZWEB
- https://nvd.nist.gov/vuln/detail/CVE-2024-35195ADVISORY
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