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Unrated severityOSV Advisory· Published Jul 13, 2026· Updated Jul 13, 2026

Mattermost schemes teams endpoint exposes private team invite IDs

CVE-2026-9820

Description

Mattermost versions 11.7.x <= 11.7.2, 10.11.x <= 10.11.19 fail to sanitize team objects returned by the scheme teams endpoint, which allows a user with the User Manager role to obtain invite links for private teams and use them to join or share access to those teams via the scheme teams API endpoint.. Mattermost Advisory ID: MMSA-2026-00671

Affected products

2
  • Mattermost/MattermostOSV2 versions
    v10.11.19, v10.11.19-rc1, v11.7.2, …+ 1 more
    • (no CPE)range: v10.11.19, v10.11.19-rc1, v11.7.2, …
    • (no CPE)range: <=11.7.2, <=10.11.19

Patches

Vulnerability mechanics

References

1

News mentions

0

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