DEBIAN-CVE-2026-53524

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2026-53524
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53524.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-53524
Upstream
Published
2026-08-21T23:16:26Z
Modified
2026-09-10T08:47:26Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:12 / weechat

Package

Name
weechat
Purl
pkg:deb/debian/weechat?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.8-1
4.*
4.0.1-1
4.0.2-1
4.0.5-1
4.1.1-1
4.3.1-1
4.4.2-1
4.4.3-1~bpo12+1
4.4.3-1
4.5.1-1
4.6.1-1
4.6.3-1~bpo12+1
4.6.3-1
4.7.2-1
4.8.1-1
4.9.0-1
4.9.3-1
4.9.4-1
4.9.5-1
4.10.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53524.json"

Debian:13 / weechat

Package

Name
weechat
Purl
pkg:deb/debian/weechat?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.6.3-1
4.7.2-1
4.8.1-1
4.9.0-1
4.9.3-1
4.9.4-1
4.9.5-1
4.10.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53524.json"

Debian:14 / weechat

Package

Name
weechat
Purl
pkg:deb/debian/weechat?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.9.3-1

Affected versions

4.*
4.6.3-1
4.7.2-1
4.8.1-1
4.9.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53524.json"