GO-2026-4282
NoneCVSS
—
EPSS
—
Published
Feb 26, 2026
CISA due date
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The record
Mattermost Server is vulnerable to channel invisibility DoS via misformatted post in github.com/mattermost/mattermost-server
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | 0 | 4.1.2-0.20171013141717-ee57a5829ab1+incompatible |
| Go | github.com/mattermost/mattermost-server | 0 | 4.1.2-0.20171013141717-ee57a5829ab1 |
| Go | github.com/mattermost/mattermost-server | 4.2.0 | 4.2.1-0.20171013140502-b3e4b0ac9168 |
| Go | github.com/mattermost/mattermost-server | 4.3.0-rc1 | 4.3.0 |
| go | github.com/mattermost/mattermost-server | 4.3.0-rc1 | 4.3.0 |
Related vulnerabilities
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- GO-2026-4326 Mattermost is vulnerable to DoS due to infinite re-renders on API errors in… Also affects github.com/mattermost/mattermost-server
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- GO-2026-4496 Mattermost doesn't validate user permissions when creating Jira issues from Mattermost… Also affects github.com/mattermost/mattermost-server
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