CVE-2025-59728: ffmpeg mpeg-dash Out-of-bounds Write

Vulnerability summary

CVE-2025-59728 is a high (CVSS 8.7) Out-of-bounds Write vulnerability in ffmpeg mpeg-dash. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 7.6% of scored vulnerabilities.

Timeline

1. 06-10-2025
   PublishedVulnerability first disclosed.
2. 26-02-2026
   Last modifiedVulnerability information updated.

Description

When calculating the content path in handling of MPEG-DASH manifests, there's an out-of-bounds NUL-byte write one byte past the end of the buffer.When we call xmlNodeGetContent below [0], it returns a buffer precisely allocated to match the string length, using strdup internally. If this buffer is not an empty string, it is assigned to root_url at [1].If the last (non-NUL) byte in this buffer is not '/' then we append '/' in-place at [2]. This will write two bytes into the buffer, starting at the last valid byte in the buffer, writing the NUL byte beyond the end of the allocated buffer. We recommend upgrading to version 8.0 or beyond.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.