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CVE-2026-28433

Misskey is an open source, federated social media platform. All Misskey servers running versions 10.93.0 and later, but prior to 2026.3.1, contain a vulnerability that allows importing other users' data due to lack of ownership validation. The impact of this vulnerability is estimated to be relatively low, as bad actors would require the ID corresponding to the target file for import. This vulnerability is fixed in 2026.3.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:818f8dba22abbf98053c400be5cfb821c77f8512e25448beeb307f3275434d18
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e1f006f356bdfde959025bb80869245327607d6191011944c22ce3bb978f49d1 · sha256:71ae1eab23df256b… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e1f006f356bdfde959025bb80869245327607d6191011944c22ce3bb978f49d1 · sha256:71ae1eab23df256b… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"misskey","vendor":"misskey-dev","versions":[{"status":"affected","version":">= 10.93.0, < 2026.3.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e1f006f356bdfde959025bb80869245327607d6191011944c22ce3bb978f49d1 · sha256:71ae1eab23df256b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e1f006f356bdfde959025bb80869245327607d6191011944c22ce3bb978f49d1 · sha256:71ae1eab23df256b… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e1f006f356bdfde959025bb80869245327607d6191011944c22ce3bb978f49d1 · sha256:71ae1eab23df256b… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e1f006f356bdfde959025bb80869245327607d6191011944c22ce3bb978f49d1 · sha256:71ae1eab23df256b… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-g6hj-33h7-6fq8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-g6hj-33h7-6fq8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e1f006f356bdfde959025bb80869245327607d6191011944c22ce3bb978f49d1 · sha256:71ae1eab23df256b… · /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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