Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-24778

Ghost vulnerable to XSS via malicious Portal preview links
Back to all
CVE

CVE-2026-24778

Ghost vulnerable to XSS via malicious Portal preview links

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 security@ghost.org.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
C
H
U
8.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Related Resources

No items found.

References

https://github.com/TryGhost/Ghost/security/advisories/GHSA-gv6q-2m97-882h, https://nvd.nist.gov/vuln/detail/CVE-2026-24778, https://github.com/TryGhost/Ghost/commit/da858e640e88e69c1773a7b7ecdc2008fa143849, https://github.com/TryGhost/Ghost

Severity

8.8

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
8.8
EPSS Probability
0.00014%
EPSS Percentile
0.02573%
Introduced Version
5.43.0,2.29.1,2.29.3,2.52.0,2.28.0
Fix Available
5.121.0,2.51.5,2.57.1

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading