Memory Allocation with Excessive Size Value Affecting github.com/mattermost/mattermost/server/v8/platform/services/docextractor package, versions >=10.11.0-rc1 <10.11.14-rc1>=11.4.0-rc1 <11.4.4>=11.5.0-rc1 <11.5.2-rc3>=11.6.0-rc1 <11.6.0-rc3
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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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERV8PLATFORMSERVICESDOCEXTRACTOR-16778754
- published20 May 2026
- disclosed18 May 2026
- creditJuho Forsén
Introduced: 18 May 2026
NewCVE-2026-6340 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/v8/platform/services/docextractor to version 10.11.14-rc1, 11.4.4, 11.5.2-rc3, 11.6.0-rc3 or higher.
Overview
Affected versions of this package are vulnerable to Memory Allocation with Excessive Size Value in the 7zip file upload process. An attacker can exhaust server memory resources by uploading a specially crafted 7zip archive containing excessive folder declarations.