CVE-2026-35203
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
ZLMediaKit, a streaming media service framework, has a heap buffer overflow vulnerability in the VP9 RTP payload parser in ext-codec/VP9Rtp.cpp. Lack of data length validation before reading can lead to out-of-bounds read.
Risk Assessment
A remote attacker can send a crafted VP9 RTP packet, causing server crash or potentially arbitrary code execution.
Recommendation
Apply commit 435dcbcbbf700fd63b2ca9eac6cef3b5ea75169d or update ZLMediaKit to a patched version.
Other vulnerabilities in ZLMediaKit
See all- CVE-2026-67827Critical
Incorrect Access Control in the HTTP API module in ZLMediaKit commit 9fd5152 allows remote attackers to achieve Remote Code Execution (RCE) via unauthenticated access to the setServerConfig API endpoint, which permits overwriting the ffmpeg.snap configuration parameter with arbitrary shell commands. These commands are subsequently executed through the getSnap API endpoint with the privileges of the ZLMediaKit process.
- CVE-2026-81028Medium
ZLMediaKit confines the downloadFile API to configured root directories with a prefix comparison that does not account for directory boundaries. A requested path is accepted if it starts with the configured root, allowing reading files from similarly named directories. The API secret is required, but the reference container runs the server as root.
Original NVD description (English source)
ZLMediaKit is a streaming media service framework. the VP9 RTP payload parser in ext-codec/VP9Rtp.cpp reads multiple fields from the RTP payload based on flag bits in the first byte, without verifying that sufficient data exists in the buffer. A crafted VP9 RTP packet with a 1-byte payload (0xFF, all flags set) causes the parser to read past the end of the allocated buffer, resulting in a heap-buffer-overflow. This vulnerability is fixed with commit 435dcbcbbf700fd63b2ca9eac6cef3b5ea75169d.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS