Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck
CVE-2026-91774Yao through v1.0.0-rc22 Missing Authorization via OpenAPI team endpoint
Medium 4.3
In plain English
A medium-severity missing authorization in yao from YaoApp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 72.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
References
- https://github.com/YaoApp/yao/issues/1553 issue-tracking
- https://github.com/YaoApp/yao/blob/v1.0.0-rc22/openapi/user/team.go#L80-L149 technical-description
- https://github.com/YaoApp/yao/blob/v1.0.0-rc22/openapi/oauth/providers/user/team.go#L37-L55 technical-description
- https://github.com/YaoApp/yao product
- VulnCheck Advisory: Yao through v1.0.0-rc22 Missing Authorization via OpenAPI team endpoint third-party-advisory