CVE-2026-110717

Description

Janus WebRTC Server through 1.4.3 contains a path traversal vulnerability in the Record&Play plugin that allows unauthenticated attackers to write files outside recordings_path via the record request filename. Attackers can supply filenames with path separators to create or truncate files ending in -audio.mjr, -video.mjr or -data.mjr anywhere the Janus process can write outside protected folders.

References

• https://github.com/meetecho/janus-gateway
• https://github.com/meetecho/janus-gateway/blob/1f0b75cac1c9ad819ee4c2a905a2c65b00b82cde/src/plugins/janus_recordplay.c#L1965
• https://github.com/meetecho/janus-gateway/blob/1f0b75cac1c9ad819ee4c2a905a2c65b00b82cde/src/record.c#L218
• https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/HkEaF-piGl
• https://www.vulncheck.com/advisories/janus-webrtc-server-through-1.4.3-path-traversal-via-record-play-filename