CVE Explorer
CVE-2026-3471
Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent an invalid URL from loading in a pop-up window in the Mattermost Desktop App which allows a malicious server owner to repeated crash the application via calling {{window.open('javascript:alert()');}}. Mattermost Advisory ID: MMSA-2026-00618
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":"6.0.1","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.4.13","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"6.2.0"},{"status":"unaffected","version":"6.1.1.0"},{"status":"unaffected","version":"5.13.5.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:2045b00129fba2d473dd5674aae3d84581a9826507425eec8ebb8695f62d816e · sha256:e384fe9b50f22a5a… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:2045b00129fba2d473dd5674aae3d84581a9826507425eec8ebb8695f62d816e · sha256:e384fe9b50f22a5a… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-939","description":"CWE-939: Improper Authorization in Handler for Custom URL Scheme","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:2045b00129fba2d473dd5674aae3d84581a9826507425eec8ebb8695f62d816e · sha256:e384fe9b50f22a5a… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"MMSA-2026-00618","tags":["vendor-advisory"],"url":"https://mattermost.com/security-updates"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2045b00129fba2d473dd5674aae3d84581a9826507425eec8ebb8695f62d816e · sha256:e384fe9b50f22a5a… · /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.