GHSA-69QC-F5M6-889C
Vulnerability from github – Published: 2026-10-07 20:43 – Updated: 2026-10-07 20:43Impact
Embed cards in the Ghost editor could be used to bypass the fix for GHSA-8vhf-xxpj-4qrg. Any staff user, including Contributors, could store scripts in post content that ran when another staff user opened the post in the editor, possibly resulting in compromise of that user's admin session.
Self-hosted sites should leave the new security.embedPreviewUrl config option at its default.
Vulnerable versions
This vulnerability is present in Ghost from v6.34.0 up to v6.65.0.
Patches
v6.67.0 contains a fix for this issue.
How to update
For self-hosters using Docker, find Docker's official Ghost image here. Updating a Docker-based Ghost instance is documented here.
If your Ghost is a Ghost-CLI install see our documentation on updating it to the latest version here.
References
Ghost thanks DONG2209 (Dong Nguyen) and Pedro Pinho for disclosing this vulnerability responsibly.
For more information
If you have any questions or comments about this advisory, email us at security@ghost.org.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "ghost"
},
"ranges": [
{
"events": [
{
"introduced": "6.34.0"
},
{
"fixed": "6.67.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-105643"
],
"database_specific": {
"cwe_ids": [
"CWE-653",
"CWE-79"
],
"github_reviewed": true,
"github_reviewed_at": "2026-10-07T20:43:05Z",
"nvd_published_at": "2026-10-05T19:17:18Z",
"severity": "HIGH"
},
"details": "### Impact\n\nEmbed cards in the Ghost editor could be used to bypass the fix for GHSA-8vhf-xxpj-4qrg. Any staff user, including Contributors, could store scripts in post content that ran when another staff user opened the post in the editor, possibly resulting in compromise of that user\u0027s admin session.\n\nSelf-hosted sites should leave the new `security.embedPreviewUrl` config option at its default. \n\n### Vulnerable versions\n\nThis vulnerability is present in Ghost from v6.34.0 up to v6.65.0.\n\n### Patches\n\nv6.67.0 contains a fix for this issue.\n\n### How to update\n\nFor self-hosters using Docker, find [Docker\u0027s official Ghost image here](https://hub.docker.com/_/ghost). Updating a Docker-based Ghost instance [is documented here](https://docs.ghost.org/install/docker#updating-ghost). \n\nIf your Ghost is a Ghost-CLI install see our documentation on [updating it to the latest version here](https://docs.ghost.org/update). \n\n### References\n\nGhost thanks [DONG2209 (Dong Nguyen)](https://github.com/DONG2209) and Pedro Pinho for disclosing this vulnerability responsibly.\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@ghost.org](mailto:security@ghost.org).",
"id": "GHSA-69qc-f5m6-889c",
"modified": "2026-10-07T20:43:05Z",
"published": "2026-10-07T20:43:05Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/TryGhost/Ghost/security/advisories/GHSA-69qc-f5m6-889c"
},
{
"type": "WEB",
"url": "https://github.com/penpot/penpot/security/advisories/GHSA-qvq5-c536-pmx8"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-105643"
},
{
"type": "PACKAGE",
"url": "https://github.com/TryGhost/Ghost"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Ghost: Stored XSS via Embed Card Previews"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.