Medium severity6.5NVD Advisory· Published Oct 26, 2026· Updated Oct 26, 2026
CVE-2026-93849
CVE-2026-93849
Description
Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10, 11.10.x <= 11.10.1 Mattermost fail to apply allocation limits to the byte-string decode paths in its WebSocket msgpack decoder, which allows an authenticated remote attacker to cause excessive server memory allocation via a crafted binary WebSocket frame declaring a Bin32 payload length of up to 4,294,967,295 bytes.. Mattermost Advisory ID: MMSA-2026-00768
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <=11.9.1, <=11.8.5, <=11.7.10, <=11.10.1
Patches
Vulnerability mechanics
References
1News mentions
0No linked articles in our index yet.