--- title: "CVE-2026-86863: pgAdmin 4 - Authentication Bypass" description: "pgAdmin 4 from 6.2 before 9.18 contains an authentication bypass caused by improper trust of HTTP headers in WebserverAuthentication, letting remote attackers authenticate as any user without credentials, exploit requires 'webserver' enabled in AUTHENTICATION_SOURCES." url: https://panop.io/threat-heartbeat/CVE-2026-86863/ --- # CVE-2026-86863 pgAdmin 4 - Authentication Bypass pgAdmin 4 from 6.2 before 9.18 contains an authentication bypass caused by improper trust of HTTP headers in WebserverAuthentication, letting remote attackers authenticate as any user without credentials, exploit requires 'webserver' enabled in AUTHENTICATION\_SOURCES. CVSS base score 9.8 /10 Critical CISA KEV Not listed Public exploit None known Authentication Not required EPSS 0.58% chance of exploitation in 30 days [View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-86863) ## Details Type Authentication Bypass Impact Broken Authentication CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Published 17 September 2026 Updated 15 October 2026 Weakness [CWE-290](https://cwe.mitre.org/data/definitions/290.html) ## Vendor fix Update to version 9.18 or later. Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them. ## References - [https://nvd.nist.gov/vuln/detail/CVE-2026-86863](https://nvd.nist.gov/vuln/detail/CVE-2026-86863) - [https://github.com/pgadmin-org/pgadmin4/issues/10383](https://github.com/pgadmin-org/pgadmin4/issues/10383) [← All CVEs](https://panop.io/threat-heartbeat/) ## What this record can't tell you - Whether you run the affected software, and where - Whether an attacker can actually reach and exploit it - The misconfigurations that never get a CVE number - What it would cost the business, ranked into what to fix first Panop answers these inside your environment, for this CVE and every other finding. [Book a demo](https://panop.io/demo)