CVE-2026-91774

EUVD-2026-78250
Yao through v1.0.0-rc22 authenticates but fails to authorize the GET /user/teams/:id endpoint, allowing any logged-in user to read full team records. Attackers can supply a known team identifier to retrieve sensitive team data including name, description, owner information, and settings without membership verification.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/YaoApp/yao
https://github.com/YaoApp/yao/blob/v1.0.0-rc22/openapi/oauth/providers/user/team.go#L37-L55
https://github.com/YaoApp/yao/blob/v1.0.0-rc22/openapi/user/team.go#L80-L149
https://github.com/YaoApp/yao/issues/1553
https://www.vulncheck.com/advisories/yao-through-1.0.0-rc22-missing-authorization-via-openapi-team-endpoint