Vulnerability Report: GO-2026-4734

CVE-2026-2578, GHSA-3rhr-jr63-hwq5
Affects: github.com/mattermost/mattermost-server, github.com/mattermost/mattermost-server/v5, and 2 more
Published: Mar 23, 2026
Unreviewed

Mattermost fails to preserve the redacted state of burn-on-read posts during deletion in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/mattermost/mattermost-server/v5 before v5.3.2-0.20260127062706-c6b205f0d770.

For detailed information about this vulnerability, visit https://github.com/advisories/GHSA-3rhr-jr63-hwq5 or https://nvd.nist.gov/vuln/detail/CVE-2026-2578.

Affected Modules

Path

Go Versions

Custom Versions^*
github.com/mattermost/mattermost-server

from v10.11.0-rc1+incompatible before v10.11.11+incompatible, from v11.2.0-rc1+incompatible before v11.2.3+incompatible, from v11.3.0-rc1+incompatible before v11.3.1+incompatible

-
github.com/mattermost/mattermost-server/v5

all versions, no known fixed

before 5.3.2-0.20260127062706-c6b205f0d770
github.com/mattermost/mattermost-server/v6

all versions, no known fixed

-
github.com/mattermost/mattermost/server/v8

before v8.0.0-20260127062706-c6b205f0d770

-

^{*Custom versions, which can't be mapped automatically to standard Go module versions, are ignored by govulncheck. (See this note on versions for more details.)}

Aliases

References

Feedback

This report is unreviewed. It was automatically generated from a third-party source and its details have not been verified by the Go team.

See anything missing or incorrect? Suggest an edit to this report.

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