Allocation of Resources Without Limits or Throttling Affecting github.com/mattermost/mattermost/server package, versions >=10.11.0 <10.11.15>=11.4.0 <11.4.5>=11.5.0 <11.5.3>=11.6.0 <11.6.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Jul 2026
- disclosed7 Jul 2026
- creditUnknown
Introduced: 7 Jul 2026
CVE-2026-5755 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server to version 10.11.15, 11.4.5, 11.5.3, 11.6.1 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the TIFF image parsing process due to missing validation of the IFD offset in the image header before memory allocation. An attacker can cause excessive memory consumption or a denial of service by submitting a specially crafted TIFF file.