CVE-2026-3590
medium
CVSS v3
—
CVSS v4 NEW
—
VIR risk
5.5
Description
Mattermost has session spoofing due to lack of single-use consumption of guest magic link tokens enforcement
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | >=8.0.0-20250721062209-4952acea88ce,<8.0.0-20250723052842-4cb8d8940332 | 8.0.0-20250723052842-4cb8d8940332 |
| Go | github.com/mattermost/mattermost-server | >=10.11.0-rc1,<10.11.13 | 10.11.13 |
| Go | github.com/mattermost/mattermost-server | >=11.5.0-rc1,<11.5.0 | 11.5.0 |
| Go | github.com/mattermost/mattermost-server | >=11.4.0-rc1,<11.4.3 | 11.4.3 |
| Go | github.com/mattermost/mattermost-server | >=11.3.0-rc1,<11.3.3 | 11.3.3 |
| GO | github.com/mattermost/mattermost-server | >= 11.3.0-rc1, < 11.3.3 | 11.3.3 |
| GO | github.com/mattermost/mattermost-server | >= 11.4.0-rc1, < 11.4.3 | 11.4.3 |
| GO | github.com/mattermost/mattermost-server | = 11.5.0-rc1 | 11.5.0 |
| GO | github.com/mattermost/mattermost-server | >= 10.11.0-rc1, < 10.11.13 | 10.11.13 |
| GO | github.com/mattermost/mattermost/server/v8 | >= 8.0.0-20250721062209-4952acea88ce, < 8.0.0-20250723052842-4cb8d8940332 | 8.0.0-20250723052842-4cb8d8940332 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.