CVE Explorer
CVE-2026-8683
Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application via including a script to call window.open on a very large URL. Mattermost Advisory ID: MMSA-2026-00652
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":"5.5.13","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"6.2.0"},{"status":"unaffected","version":"5.13.6.0"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:7d6414930b3c4f03d4fd21b098ec22a226c6d63dacd8e8f305cedd59ec8dff29 · sha256:001cbbd823acb2ee… · /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:v2:7d6414930b3c4f03d4fd21b098ec22a226c6d63dacd8e8f305cedd59ec8dff29 · sha256:001cbbd823acb2ee… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:7d6414930b3c4f03d4fd21b098ec22a226c6d63dacd8e8f305cedd59ec8dff29 · sha256:001cbbd823acb2ee… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"MMSA-2026-00652","tags":["vendor-advisory"],"url":"https://mattermost.com/security-updates"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:7d6414930b3c4f03d4fd21b098ec22a226c6d63dacd8e8f305cedd59ec8dff29 · sha256:001cbbd823acb2ee… · /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.