CVE-2026-50891
Privilege escalation via flawed /admin/api/config access control in Filestash v0.4.0.
Is CVE-2026-50891 being exploited?
Not confirmed. CVE-2026-50891 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 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-50891?
CVE-2026-50891 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-2026-50891?
Not known from our data. No patch reference has been recorded for CVE-2026-50891, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-50891 affect?
CVE-2026-50891 affects Filestash v0.4.0, admin API. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-50891?
Patch when available; restrict admin API exposure and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Privilege escalation by crafting requests to the admin API, bypassing access controls and elevating privileges.
Patch when possible