CVE-2026-24778 is a high-severity cross-site scripting (XSS) vulnerability in ghost (npm), affecting versions >= 5.43.0, < 5.121.0. It is fixed in 5.121.0, 2.51.5, 2.57.1, 6.15.0.
Impact An attacker was able to craft a malicious link that, when accessed by an authenticated staff user or member, would execute JavaScript with the victim's permissions, potentially leading to account takeover. Vulnerable versions This vulnerability is present in Ghost versions: v5.43.0 to v5.120.4 v6.0.0 to v6.14.0 As well as in Portal versions: v2.29.1 to v2.51.4 v2.52.0 to v2.57.0 Patches Ghost automatically loads the latest patch of the members Portal component via CDN. Therefore: For Ghost 5.x users, upgrading to v5.121.0 or later fixes the vulnerability (loads Portal v2.51.5, which contains the patch) For Ghost 6.x users, upgrading to v6.15.0 or later fixes the vulnerability (loads Portal v2.57.1, which contains the patch) For Ghost installations using a customised or self-hosted version of Portal, it will be necessary to manually rebuild from or update to the latest patch version. References Ghost thanks Younes Belalia for discovering and disclosing this vulnerability responsibly. For more information If users have any questions or comments about this advisory, email Ghost at [email protected].
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
CVE-2026-24778 has a CVSS score of 8.8 (High). The vector is network-reachable, no privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (5.121.0, 2.51.5, 2.57.1, 6.15.0). Upgrading removes the vulnerable code path.
npm
ghost (>= 5.43.0, < 5.121.0)@tryghost/portal (>= 2.29.1, < 2.51.5)@tryghost/portal (>= 2.52.0, < 2.57.1)ghost (>= 6.0.0, < 6.15.0)ghost → 5.121.0 (npm)@tryghost/portal → 2.51.5 (npm)@tryghost/portal → 2.57.1 (npm)ghost → 6.15.0 (npm)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
Kodem's runtime-powered SCA identifies whether CVE-2026-24778 is reachable in your applications. Explore open-source security for your team.
See if CVE-2026-24778 is reachable in your applications. Get a demo
Already deployed Kodem? See CVE-2026-24778 in your environment →Upgrade the following packages to resolve this vulnerability:
ghost to 5.121.0 or later@tryghost/portal to 2.51.5 or later@tryghost/portal to 2.57.1 or laterghost to 6.15.0 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-24778 is a high-severity cross-site scripting (XSS) vulnerability in ghost (npm), affecting versions >= 5.43.0, < 5.121.0. It is fixed in 5.121.0, 2.51.5, 2.57.1, 6.15.0. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
CVE-2026-24778 has a CVSS score of 8.8 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
ghost (npm) (versions >= 5.43.0, < 5.121.0)@tryghost/portal (npm) (versions >= 2.29.1, < 2.51.5)Yes. CVE-2026-24778 is fixed in 5.121.0, 2.51.5, 2.57.1, 6.15.0. Upgrade to this version or later.
Whether CVE-2026-24778 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
ghost to 5.121.0 or later@tryghost/portal to 2.51.5 or later@tryghost/portal to 2.57.1 or laterghost to 6.15.0 or later