Is there a public exploit for CVE-2026-59979?

No public exploit for CVE-2026-59979 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-59979?

CVE-2026-59979 scores CVSS 8.3 (v3.1), rated high.

8.3 High

YosemiteCrew provides organization-based service and task management.

CVE-2026-59979

YosemiteCrew provides organization-based service and task management. In the source-reported affected main and dev snapshots, YosemiteCrew's service and PMS task-library/template routes omit organization and permission checks. authorizeCognito in apps/backend/src/middlewares/auth.ts sets the authenticated user's ID but does not provide the withOrgPermissions() and requirePermission(...) checks used by protected siblings. In apps/backend/src/routers/service.router.ts, PATCH /fhir/v1/service/:id and DELETE /fhir/v1/service/:id are authentication-only, while GET /fhir/v1/service/:id has no authentication middleware. The trace through apps/backend/src/controllers/web/service.controller.ts to apps/backend/src/services/service.service.ts passes a global record ID into ServiceModel.findById(oid) without an organisationId filter. In apps/backend/src/routers/task.router.ts, PUT /v1/task/pms/library/:libraryId, POST /v1/task/pms/templates, PATCH /v1/task/pms/templates/:templateId and DELETE /v1/task/pms/templates/:templateId likewise lack organization/role enforcement. Any registered platform user, including a patient/companion-app account, can modify or delete another organization's…

Assessment

CVSS: 8.3 (v3.1)
Severity: High
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 28 October 2026
Last updated: 2 November 2026
Weakness: CWE-639, CWE-862
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

At the source

References

https://github.com/YosemiteCrew/Yosemite-Crew/security/advisories/GHSA-256m-gg99-4274

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