Requests is a HTTP library. Prior to version 2.33.0, the function `requests.utils.extract_zipped_paths()` (which is used by `HTTPAdapter.cert_verify()` to load the CA bundle, often from the `certifi` package's zipapp structure) uses a predictable, non-unique filename (the basename of the file, e.g., `cacert.pem`) when attempting to extract files into the system's temporary directory (`/tmp`). The vulnerable logic performs a check to see if the target file already exists in `/tmp` and re-uses the existing file if found, instead of securely checking the file's content or ensuring atomic, unique extraction. This allows a Local Attacker to pre-create a malicious CA bundle file (e.g., `/tmp/cacert.pem`) before a vulnerable application (running with potentially higher privileges) initializes the `requests` library. Version 2.33.0 contains a patch.

Requests is a HTTP library. Prior to version 2.33.0, the `requests.utils.extract_zipped_paths()` utility function uses a predictable filename when extracting files from zip archives into the system temporary directory. If the target file already exists, it is reused without validation. A local attacker with write access to the temp directory could pre-create a malicious file that would be loaded in place of the legitimate one. Standard usage of the Requests library is not affected by this vulnerability. Only applications that call `extract_zipped_paths()` directly are impacted. Starting in version 2.33.0, the library extracts files to a non-deterministic location. If developers are unable to upgrade, they can set `TMPDIR` in their environment to a directory with restricted write access.

Requests is a HTTP library. Prior to version 2.33.0, the function `requests.utils.extract_zipped_paths()` (which is used by `HTTPAdapter.cert_verify()` to load the CA bundle, often from the `certifi` package's zipapp structure) uses a predictable, non-unique filename (the basename of the file, e.g., `cacert.pem`) when attempting to extract files into the system's temporary directory (`/tmp`). The vulnerable logic performs a check to see if the target file already exists in `/tmp` and re-uses the existing file if found, instead of securely checking the file's content or ensuring atomic, unique extraction. This allows a Local Attacker to pre-create a malicious CA bundle file (e.g., `/tmp/cacert.pem`) before a vulnerable application (running with potentially higher privileges) initializes the `requests` library. Version 2.33.0 contains a patch.

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

CWE-377

https://github.com/psf/requests/commit/66d21cb07bd6255b1280291c4fafb71803cdb3b7

https://github.com/psf/requests/releases/tag/v2.33.0

https://github.com/psf/requests/security/advisories/GHSA-gc5v-m9x4-r6x2