Vulnerability · Published Apr 6, 2026 · Assigned by GitHub_M
CVE-2026-35203ZLMediaKit VP9 RTP Parser Out-of-Bounds Read
High 7.5
In plain English
A high-severity out-of-bounds read in ZLMediaKit from ZLMediaKit. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ZLMediaKit | ZLMediaKit | < 435dcbcbbf700fd63b2ca9eac6cef3b5ea75169d |
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H