CVE-2026-59509
Unauthenticated input validation allows reading arbitrary MongoDB data via /fetch_cve_data.
Is CVE-2026-59509 being exploited?
Not confirmed. CVE-2026-59509 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 0.54% probability of exploitation in the next 30 days.
How severe is CVE-2026-59509?
CVE-2026-59509 is rated Critical with a CVSS score of 9.2. 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-2026-59509?
Not known from our data. No patch reference has been recorded for CVE-2026-59509, 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-2026-59509 affect?
CVE-2026-59509 affects cve-search web app, POST /fetch_cve_data endpoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-59509?
Patch when available; restrict endpoint access and rotate admin credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Exposes admin usernames and password hashes from mgmt_users; enables offline cracking and potential admin takeover.
Immediate action required
- affected>= v4.0 and <= v6.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.