CVE Explorer
CVE-2026-9162
Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 fail to invalidate cached authentication state for active WebSocket connections during global session revocation, which allows a user with an existing WebSocket connection to remain authenticated and continue receiving real-time events until the cached session expires or the client reconnects.. Mattermost Advisory ID: MMSA-2026-00664
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"11.7.0","status":"affected","version":"11.7.0","versionType":"semver"},{"lessThanOrEqual":"11.6.2","status":"affected","version":"11.6.0","versionType":"semver"},{"lessThanOrEqual":"11.5.5","status":"affected","version":"11.5.0","versionType":"semver"},{"lessThanOrEqual":"10.11.17","status":"affected","version":"10.11.0","versionType":"semver"},{"status":"unaffected","version":"11.8.0"},{"status":"unaffected","version":"11.7.1"},{"status":"unaffected","version":"11.6.3"},{"status":"unaffe…
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:ba05f74ee0a5bf24ceaf7f877ab59486149a8965c92c5fa569b472a55b7ddc2c · sha256:4fc0b3614292922d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:ba05f74ee0a5bf24ceaf7f877ab59486149a8965c92c5fa569b472a55b7ddc2c · sha256:4fc0b3614292922d… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-613","description":"CWE-613: Insufficient Session Expiration","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:ba05f74ee0a5bf24ceaf7f877ab59486149a8965c92c5fa569b472a55b7ddc2c · sha256:4fc0b3614292922d… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"MMSA-2026-00664","tags":["vendor-advisory"],"url":"https://mattermost.com/security-updates"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:ba05f74ee0a5bf24ceaf7f877ab59486149a8965c92c5fa569b472a55b7ddc2c · sha256:4fc0b3614292922d… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.