CVE Explorer

CVE-2026-4643

Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking {{window.close()}} in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1acf55f89cd4e24b3975ad82c22cd053f229bf9bccd42da759ca97c44a209cfd

Known exploited

Not asserted

Disputed

Stale source

Conflicts

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_v5affected
urn:baitaphish:normalized-source-record:v2:3226bcba4340a5cd8ec8faedc873fde0a6737cfccd8b8dea5cfaa3e547376165 · sha256:5dc757a685d1f86e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:3226bcba4340a5cd8ec8faedc873fde0a6737cfccd8b8dea5cfaa3e547376165 · sha256:5dc757a685d1f86e… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-754","description":"CWE-754: Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:3226bcba4340a5cd8ec8faedc873fde0a6737cfccd8b8dea5cfaa3e547376165 · sha256:5dc757a685d1f86e… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"name":"MMSA-2026-00633","tags":["vendor-advisory"],"url":"https://mattermost.com/security-updates"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:3226bcba4340a5cd8ec8faedc873fde0a6737cfccd8b8dea5cfaa3e547376165 · sha256:5dc757a685d1f86e… · /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.

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