Executive brief
GPAC is an open-source multimedia framework used for video streaming, transcoding, and packaging. A flaw in the downloader component allows an attacker with local access to trigger an out-of-bounds memory read by crafting a malicious Content-Range header, potentially leading to information disclosure or application crashes.
Technical details
This vulnerability is an out-of-bounds read in the wait_for_header_and_parse function located in src/utils/downloader.c. The root cause is improper validation of the Content-Range HTTP header argument, which can be manipulated to read memory beyond allocated boundaries. The attack vector requires local access to the system. An attacker can exploit this to leak sensitive information from memory or cause a denial of service through application crash. The issue has been fixed in version abi-16.26 (patch c74a3065038ede35c1c7b75fa493a69ef6bcdb84), which corrects the strchr pattern handling that was leading to heap overflows.
Affected products
- GPAC GPAC 26.08-DEV and earlier; fixed in abi-16.26
Timeline
- 2026-09-16: disclosed
- 2026-09-16: patched: Patch c74a3065038ede35c1c7b75fa493a69ef6bcdb84 available for version abi-16.26