CVE Explorer
CVE-2026-28736
** UNSUPPORTED WHEN ASSIGNED ** Focalboard version 8.0 fails to validate file ownership when serving uploaded files. This allows an authenticated attacker who knows a victim's fileID to read the content of the file. NOTE: Focalboard as a standalone product is not maintained and no fix will be issued.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Focalboard","vendor":"Mattermost","versions":[{"lessThanOrEqual":"8.0","status":"affected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:90f899fd57268c0e0b8e4c269ab7373fa5778a549fe00dbbea033839288c2db6 · sha256:0a3d1b06b5bd9d59… · /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:v2:90f899fd57268c0e0b8e4c269ab7373fa5778a549fe00dbbea033839288c2db6 · sha256:0a3d1b06b5bd9d59… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:90f899fd57268c0e0b8e4c269ab7373fa5778a549fe00dbbea033839288c2db6 · sha256:0a3d1b06b5bd9d59… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"Focalboard Repository (Unmaintained)","tags":["product"],"url":"https://github.com/mattermost-community/focalboard"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:90f899fd57268c0e0b8e4c269ab7373fa5778a549fe00dbbea033839288c2db6 · sha256:0a3d1b06b5bd9d59… · /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.