Get real-time updates on Telegram
CVE-2026-53524: weechat >= 4.3.0, < 4.9.1
CVE-2026-53524. CVSS 3.1 base score 6.5 (MEDIUM, Vendor/CNA). EPSS 0.00484 (percentile 0.39976), scored 13-Oct-2026.
Affected technology
weechat · >= 4.3.0, < 4.9.1
weechat
Component: Not specified by the source
Function: relay_websocket_inflate
Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required
What an attacker can do
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. Vendor/CNA’s CVSS 3.1 assessment (base score 6.5/10) rates confidentiality and integrity impact as none; availability impact as high.
- CWE
- CWE-409
- CCR priority
- 26.1 /100 (P4)
- CVSS 3.1
- 6.5 /10 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
- EPSS
- 0.00484 · percentile 0.39976 · 2026-10-13
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-15 01:07:31.726917+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-53524.html