Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck

CVE-2026-103283Ghost 6.20.0 before 6.57.1 Authentication Bypass via Session Handling

High 8.1

In plain English

A high-severity security flaw in Ghost from TryGhost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.3%top 80.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Ghost versions 6.20.0 before 6.57.1 contain a session handling vulnerability that allows authenticated staff users to log in as any other staff user with only the password, bypassing two-factor authentication. Attackers with valid staff credentials can exploit improper session management to impersonate other staff members and gain unauthorized access to administrative functions.

Affected products (as reported)

Vendor	Product	Versions
TryGhost	Ghost	6.20.0 – before 6.57.1

Weakness: CWE-613 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-q55r-w7fh-rmh6) vendor-advisory
VulnCheck Advisory: Ghost 6.20.0 before 6.57.1 Authentication Bypass via Session Handling third-party-advisory