CVE-2026-51956
IDOR allows authenticated users to access/modify other tenants' company records via /company/{id}.
Is CVE-2026-51956 being exploited?
Not confirmed. CVE-2026-51956 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.23% probability of exploitation in the next 30 days.
How severe is CVE-2026-51956?
CVE-2026-51956 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-51956?
Yes. A fix has been recorded for CVE-2026-51956. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-51956 affect?
CVE-2026-51956 affects Grashjs Atlas CMMS < v1.6.0, Self-hosted Grashjs/cmms deployments. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-51956?
Upgrade to v1.6.0; enforce tenant ownership checks and audit cross-tenant access.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker can read and modify other tenants' company profiles by changing numeric ID in /company/{id}, enabling data theft and tampering.
Immediate action required