Use After Free Affecting python package, versions [0,3.14.0b1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-PYTHON-10246591
- published26 May 2025
- disclosed15 May 2025
- creditUnknown
Introduced: 15 May 2025
CVE-2025-4516 (opens in a new tab)How to fix?
Upgrade python to version 3.14.0b1 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free through the unicode_escape decoder when used with an error handler. An attacker can trigger a use-after-free condition by manipulating the memory after it has been freed. This is only exploitable if the unicode_escape encoding and an error handler (ignore or replace) are used together.