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CVE-2026-46713

Misskey is an open source, federated social media platform. Versions 12.37.0 and later, but prior to 2026.5.4, contain a vulnerability in the JSON-LD signature validation and compaction process that allows spoofed activities to be accepted as valid. This issue has been fixed in version 2026.5.4.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5ff2cf9cde838d34c344e04a19a3a755e8685ac7c4711df442775ed55f6053d6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"misskey","vendor":"misskey-dev","versions":[{"status":"affected","version":">= 12.37.0, < 2026.5.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bbb6770eb14563f80ef67a3837972b938f57fdb4dd56645b89afa9157ddd98b8 · sha256:9540ce251de4f8fa… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:bbb6770eb14563f80ef67a3837972b938f57fdb4dd56645b89afa9157ddd98b8 · sha256:9540ce251de4f8fa… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-347","description":"CWE-347: Improper Verification of Cryptographic Signature","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:bbb6770eb14563f80ef67a3837972b938f57fdb4dd56645b89afa9157ddd98b8 · sha256:9540ce251de4f8fa… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/misskey-dev/misskey/releases/tag/2026.5.4","tags":["x_refsource_MISC"],"url":"https://github.com/misskey-dev/misskey/releases/tag/2026.5.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbb6770eb14563f80ef67a3837972b938f57fdb4dd56645b89afa9157ddd98b8 · sha256:9540ce251de4f8fa… · /containers/cna/references/1
{"name":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-w8x2-gpq6-jxvf","tags":["x_refsource_CONFIRM"],"url":"https://github.com/misskey-dev/misskey/security/advisories/GHSA-w8x2-gpq6-jxvf"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bbb6770eb14563f80ef67a3837972b938f57fdb4dd56645b89afa9157ddd98b8 · sha256:9540ce251de4f8fa… · /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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