Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck

CVE-2026-103266Ghost 5.2.0 before 6.62.0 Unauthenticated Stripe Checkout Account Modification

High 7.1

In plain English

A high-severity incorrect authorization 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 23% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.3%top 77.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Ghost versions 5.2.0 through versions prior to 6.62.0 allow a remote attacker, without authentication, to abuse the Stripe Checkout flow to attach a paid subscription to an existing member, modify that member's name, and inject content into newsletters sent to the member. Depending on the recipient's email client, the injected content may be rendered, resulting in HTML injection or cross-site scripting (XSS).

Affected products (as reported)

Vendor	Product	Versions
TryGhost	Ghost	5.2.0 – before 6.62.0

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N

References

GitHub Security Advisory (GHSA-qppx-rw6v-xjqf) vendor-advisory
VulnCheck Advisory: Ghost 5.2.0 before 6.62.0 Unauthenticated Stripe Checkout Account Modification third-party-advisory