CVE-2026-25645

Local file substitution via predictable temporary path

Published Mar 25, 2026 · Updated Mar 25, 2026

Insecure temporary-file handling in Python Software Foundation Requests before 2.33.0 allows local users to substitute extracted files. The requests.utils.extract_zipped_paths() function derives a predictable destination in the system temporary directory and reuses any existing file without validating its provenance. Exploitation requires write access to that directory and a victim application that directly calls the utility, causing attacker-controlled content to be loaded instead of the archive member.

CVSS severity4.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure temporary-file handling in Python Software Foundation Requests before 2.33.0 allows local users to substitute extracted files. The requests.utils.extract_zipped_paths() function derives a predictable destination in the system temporary directory and reuses any existing file without validating its provenance. Exploitation requires write access to that directory and a victim application that directly calls the utility, causing attacker-controlled content to be loaded instead of the archive member.

The record

CVE
CVE-2026-25645
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
Python Software Foundation
Product
Requests
Classifications
CWE-377
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.33.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Python Software Foundation · Requestsversion=< 2.33.0

Published CVSS scores

4.4GitHubCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-377Insecure Temporary File

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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