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CVE-2026-16251

6.5 medium SSVC exploitation: none Undergoing Analysis
NVD · CVE.org

Mattermost versions 11.10.x <= 11.10.0, 11.7.x <= 11.7.9, 11.9.x <= 11.9.1, 11.8.x <= 11.8.5 fail to limit the size of remote image responses buffered in memory during local image proxy direct fetches, which allows a remote attacker to cause memory exhaustion on the server via a crafted oversized image response.. Mattermost Advisory ID: MMSA-2026-00726

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 2

  1. StatusReceived → Undergoing AnalysisNVD modified 2026-10-16 19:23
  2. First seenCVSS 6.5NVD modified 2026-10-16 08:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 1