weechat: WeeChat (Wee Enhanced Environment for Chat) is a free chat client
CVE-2026-53524 is fixed in weechat on 1 platform, first by DEBIAN-CVE-2026-53524, released August 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| weechat · Debian 14 | 4.9.3-1 | DEBIAN-CVE-2026-53524 | Aug 18, 2026 |
| weechat · opensuse-leap 16.0 | 4.10.0-bp160.1.1 | OPENSUSE-SU-2026:21615-1 | Aug 20, 2026 |
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