Threats affecting pkg:github/tinyproxy/tinyproxy

Tinyproxy through 1.11.3 is vulnerable to HTTP request parsing desynchronization due to a case-sensitive comparison of the Transfer-Encoding header in src/reqs.c. The is_chunked_transfer function uses strcmp to compare the header value against "chunked", even though RFC 7230 specifies that transfer-coding names are case-insensitive.

CVE-2025-63938 is an integer overflow vulnerability in Tinyproxy versions up to 1.11.2, specifically in the strip_return_port() function within src/reqs.c. This flaw allows an unauthenticated remote attacker to cause a partial compromise of confidentiality and integrity without requiring user interaction. The vulnerability has a CVSS score of 6.5 (medium severity) and does not impact availability. No known exploits are currently in the wild. The vulnerability arises from improper handling of integer values leading to overflow, which could be leveraged to manipulate proxy request processing. European organizations using Tinyproxy as a lightweight HTTP proxy may face risks, especially those in sectors relying on secure proxying for internal or external communications.