Upstream information

CVE-2026-53524 at MITRE

Description

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (GitHub)
Base Score 6.5
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
CVSSv3 Version 3.1
No SUSE Bugzilla entries cross referenced.

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Leap 16.0
  • weechat >= 4.10.0-bp160.1.1
  • weechat-devel >= 4.10.0-bp160.1.1
  • weechat-lang >= 4.10.0-bp160.1.1
  • weechat-lua >= 4.10.0-bp160.1.1
  • weechat-perl >= 4.10.0-bp160.1.1
  • weechat-python >= 4.10.0-bp160.1.1
  • weechat-ruby >= 4.10.0-bp160.1.1
  • weechat-spell >= 4.10.0-bp160.1.1
  • weechat-tcl >= 4.10.0-bp160.1.1
 Patchnames:
openSUSE-Leap-16.0-packagehub-516
openSUSE Tumbleweed
  • weechat >= 4.10.0-1.1
  • weechat-devel >= 4.10.0-1.1
  • weechat-lang >= 4.10.0-1.1
  • weechat-lua >= 4.10.0-1.1
  • weechat-perl >= 4.10.0-1.1
  • weechat-python >= 4.10.0-1.1
  • weechat-ruby >= 4.10.0-1.1
  • weechat-spell >= 4.10.0-1.1
  • weechat-tcl >= 4.10.0-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-11481

SUSE Timeline for this CVE

CVE page created: Mon Aug 10 11:35:54 2026
CVE page last modified: Sat Sep 19 12:48:52 2026