CVE-2026-91774

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-15. the CNA's CVSS baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 24, 2026

Advisory Details (5)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

Yao through v1.0.0-rc22 Missing Authorization via OpenAPI team endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/yao-through-1.0.0-rc22-missing-authorization-via-openapi-team-endpoint
generic

GitHub - YaoApp/yao: ✨ All your agents and workspaces in one place, on every device you own. Track tasks on a board, accessible from desktop, mobile, browser, or API. Self-hosted. · GitHub

https://github.com/YaoApp/yao
generic

yao/openapi/oauth/providers/user/team.go at v1.0.0-rc22 · YaoApp/yao · GitHub

https://github.com/YaoApp/yao/blob/v1.0.0-rc22/openapi/oauth/providers/user/team.go#L37-L55
generic

yao/openapi/user/team.go at v1.0.0-rc22 · YaoApp/yao · GitHub

https://github.com/YaoApp/yao/blob/v1.0.0-rc22/openapi/user/team.go#L80-L149
generic

Missing membership check on GET /user/teams/:id allows any authenticated user to read other tenants' team details · Issue #1553 · YaoApp/yao · GitHub

https://github.com/YaoApp/yao/issues/1553

Vendor Advisories for CVE-2026-91774(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-24 14:52 UTCEG score recompute
  2. 2026-09-24 14:52 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 17:21 UTCGHSA enrichment
  6. 2026-09-23 00:04 UTCEG score recompute
  7. 2026-09-23 00:04 UTCGHSA enrichment
  8. 2026-09-22 16:01 UTCEPSS rescore
  9. 2026-09-21 23:21 UTCEG score recompute
  10. 2026-09-21 23:21 UTCGHSA enrichment
  11. 2026-09-21 21:09 UTCEPSS rescore
  12. 2026-09-20 22:39 UTCEG score recompute
  13. 2026-09-20 22:39 UTCGHSA enrichment
  14. 2026-09-20 20:16 UTCEPSS rescore
  15. 2026-09-19 21:58 UTCEG score recompute
  16. 2026-09-19 21:58 UTCGHSA enrichment
  17. 2026-09-18 21:15 UTCEG score recompute
  18. 2026-09-18 21:15 UTCGHSA enrichment
  19. 2026-09-18 19:28 UTCEPSS rescore
  20. 2026-09-17 20:29 UTCEG score recompute
  21. 2026-09-17 20:29 UTCGHSA enrichment
  22. 2026-09-17 19:39 UTCEG score recompute
  23. 2026-09-17 19:39 UTCGHSA enrichment
  24. 2026-09-17 19:32 UTCEPSS rescore
  25. 2026-09-17 03:54 UTCEG score recompute
Show 8 more
  1. 2026-09-17 03:54 UTCGHSA enrichment
  2. 2026-09-16 14:09 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-16 03:12 UTCEG score recompute
  5. 2026-09-16 03:12 UTCGHSA enrichment
  6. 2026-09-15 02:30 UTCEG score recompute
  7. 2026-09-15 01:40 UTCEG score recompute
  8. 2026-09-15 01:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91774?
CVE-2026-91774 is a medium vulnerability published on September 15, 2026. 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…
When was CVE-2026-91774 disclosed?
CVE-2026-91774 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91774 actively exploited?
CVE-2026-91774 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 75.0% of all scored CVEs.
What is the CVSS score of CVE-2026-91774?
CVE-2026-91774 has a CVSS v4.0 base score of 4.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-91774?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91774, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-91774

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