Integer Overflow or Wraparound Affecting tinyproxy/tinyproxy package, versions [,1.11.3)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Integer Overflow or Wraparound vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UNMANAGED-TINYPROXYTINYPROXY-14135979
- published27 Nov 2025
- disclosed26 Nov 2025
- creditUnknown
Introduced: 26 Nov 2025
CVE-2025-63938 (opens in a new tab)How to fix?
Upgrade tinyproxy/tinyproxy to version 1.11.3 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the strip_return_port function in the reqs.c file. An attacker can cause a buffer overflow and potentially execute arbitrary code by sending specially crafted input that triggers an integer overflow.