Popis
WeeChat (Wee Enhanced Environment for Chat) is a free chat client. In versions 4.3.0 through 4.9.0, the WeeChat relay module-s WebSocket permessage-deflate decompression function relay_websocket_inflate() has no upper bound on output size. An authenticated relay user can send a small compressed WebSocket frame (~100 bytes) that decompresses to gigabytes, exhausting all server memory and crashing the entire WeeChat process. The api protocol enables permessage-deflate and requires authentication before WebSocket upgrade. Version 4.9.1 patches the issue.
CVSS 6.5EPSS 0.268%Riziko 0.67
Zobraziť zdroj- Zverejnené
- 2026-08-21 23:16:26
- Dotknuté verzie
- >=4.3.0,<4.9.1
- Typ
- Iné
- Posledná úprava
- 2026-08-24 20:16:47
- Vektor
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H