CVE-2026-25645: Requests has Insecure Temp File Reuse in its extract_zipped_paths() utility function

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-25 · updated 2026-06-17
Weakness: CWE-377

Description

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.

Affected products

psf requests: before 2.33.0 — fixed in 2.33.0
Pypi Requests: before 2.33.0; 0.0.1, 0.10.0, 0.10.1, 0.10.2, 0.10.3, 0.10.4 (+151) — fixed in 2.33.0

How to fix

Upgrade to a fixed version: psf requests 2.33.0; Pypi Requests 2.33.0. Check the vendor advisory for mitigations.

References

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