CVE-2026-17566
Authenticated RCE via pgAdmin4 Import/Export psql COPY command injection
Is CVE-2026-17566 being exploited?
Not confirmed. CVE-2026-17566 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 0.56% probability of exploitation in the next 30 days.
How severe is CVE-2026-17566?
CVE-2026-17566 is rated Critical with a CVSS score of 9.4. 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-2026-17566?
Yes. A fix has been recorded for CVE-2026-17566. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-17566 affect?
CVE-2026-17566 affects pgAdmin 4 (versions with _is_query_parens_balanced(), pre-fix), psql invoked by pgAdmin, Servers hosting pgAdmin/psql. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-17566?
Upgrade pgAdmin to the patched release; restrict tools_import_export_data; avoid untrusted queries in Import/Export.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker with tools_import_export_data can inject a psql TO PROGRAM clause to execute arbitrary OS commands on the pgAdmin/psql host.
Immediate action required
- affected< 9.18
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.