CVE-2026-53943

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-53943
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53943.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-53943
Aliases
  • GHSA-62q6-4hv4-vjrw
Published
2026-06-24T18:13:04.114Z
Modified
2026-06-26T11:57:05.641405302Z
Severity
  • 9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H CVSS Calculator
Summary
Ghost: Cache-poisoning XSS in Ghost frontend via x-ghost-preview header
Details

Ghost is a Node.js content management system. From until 6.37.0, when Ghost is behind a shared caching layer that results in cached content being shared between different visitors, an unauthenticated user could send an x-ghost-preview header that altered the rendered frontend response. In affected cache configurations, that response could be stored and served to subsequent visitors requesting the same page, allowing cache poisoning of request-specific preview output. When running Ghost's frontend and admin panel on the same domain this could be used to take over staff user accounts. When running these on different domains staff accounts have no exposure. This vulnerability is fixed in 6.37.0.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53943.json",
    "cwe_ids": [
        "CWE-524"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/tryghost/ghost

Affected ranges

Type
GIT
Repo
https://github.com/tryghost/ghost
Events
Introduced
6058ee39069f83c698cc0c8d4492a4dfd2c4eed2
Fixed
392e6feaad7ec0bf37e8089fa524c15ec863d3e3
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "4.0.0"
        },
        {
            "fixed": "6.37.0"
        }
    ]
}

Affected versions

@tryghost/admin-x-settings@0.*
@tryghost/admin-x-settings@0.0.2
@tryghost/admin-x-settings@0.0.3
@tryghost/admin-x-settings@0.0.4
@tryghost/admin-x-settings@0.0.5
@tryghost/admin-x-settings@0.0.6
@tryghost/admin-x-settings@0.0.7
@tryghost/admin-x-settings@0.0.8
@tryghost/announcement-bar@1.*
@tryghost/announcement-bar@1.1.6
@tryghost/announcement-bar@1.1.7
@tryghost/comments-ui@0.*
@tryghost/comments-ui@0.13.0
@tryghost/portal@2.*
@tryghost/portal@2.13.2
@tryghost/portal@2.14.0
@tryghost/portal@2.16.0
@tryghost/portal@2.17.0
@tryghost/portal@2.18.0
@tryghost/portal@2.19.3
@tryghost/portal@2.19.5
@tryghost/portal@2.19.6
@tryghost/portal@2.19.7
@tryghost/portal@2.19.8
@tryghost/portal@2.19.9
@tryghost/portal@2.20.0
@tryghost/portal@2.20.1
@tryghost/portal@2.20.2
@tryghost/portal@2.20.3
@tryghost/portal@2.21.0
@tryghost/portal@2.22.0
@tryghost/portal@2.23.0
@tryghost/portal@2.24.0
@tryghost/portal@2.24.1
@tryghost/portal@2.25.0
@tryghost/portal@2.26.0
@tryghost/portal@2.27.0
@tryghost/portal@2.28.0
@tryghost/portal@2.28.1
@tryghost/portal@2.29.0
@tryghost/portal@2.29.1
@tryghost/portal@2.29.2
@tryghost/portal@2.29.3
@tryghost/portal@2.30.0
@tryghost/portal@2.30.1
@tryghost/portal@2.31.0
@tryghost/portal@2.31.1
@tryghost/portal@2.31.2
@tryghost/portal@2.32.0
@tryghost/portal@2.33.0
@tryghost/portal@2.33.1
@tryghost/portal@2.33.2
@tryghost/portal@2.33.3
@tryghost/portal@2.33.4
@tryghost/portal@2.36.5
@tryghost/portal@2.37.0
@tryghost/signup-form@0.*
@tryghost/signup-form@0.0.1
@tryghost/signup-form@0.0.3
@tryghost/signup-form@0.1.0
@tryghost/signup-form@0.1.1
@tryghost/signup-form@0.1.2
@tryghost/signup-form@0.1.3
v4.*
v4.0.0
v4.0.1
v4.1.0
v4.1.1
v4.1.2
v4.10.0
v4.15.0
v4.16.0
v4.17.0
v4.18.0
v4.19.0
v4.2.0
v4.20.0
v4.20.1
v4.21.0
v4.22.0
v4.22.2
v4.22.4
v4.24.0
v4.25.1
v4.26.0
v4.27.0
v4.27.1
v4.27.2
v4.28.0
v4.29.0
v4.3.0
v4.30.0
v4.30.1
v4.31.0
v4.32.0
v4.32.1
v4.32.3
v4.33.0
v4.34.0
v4.35.0
v4.36.0
v4.36.2
v4.37.0
v4.38.0
v4.39.0
v4.4.0
v4.40.0
v4.41.0
v4.41.3
v4.42.0
v4.43.0
v4.44.0
v4.45.0
v4.46.0
v4.5.0
v4.6.0
v4.6.1
v4.6.2
v4.7.0
v4.8.0
v4.9.0
v4.9.1
v5.*
v5.0.0
v5.0.1
v5.1.0
v5.1.1
v5.10.0
v5.100.0
v5.101.0
v5.101.4
v5.101.6
v5.102.0
v5.103.0
v5.104.0
v5.105.0
v5.106.0
v5.106.1
v5.107.0
v5.108.0
v5.108.1
v5.109.0
v5.109.3
v5.109.6
v5.11.0
v5.110.0
v5.110.2
v5.111.0
v5.112.0
v5.113.0
v5.114.0
v5.115.1
v5.116.0
v5.116.2
v5.117.0
v5.118.0
v5.118.1
v5.119.0
v5.119.2
v5.12.0
v5.12.1
v5.120.0
v5.120.2
v5.121.0
v5.122.0
v5.125.1
v5.126.0
v5.127.0
v5.127.1
v5.128.0
v5.129.0
v5.129.1
v5.129.2
v5.13.0
v5.130.0
v5.130.1
v5.14.0
v5.15.0
v5.16.0
v5.17.0
v5.18.0
v5.19.0
v5.2.0
v5.2.1
v5.2.2
v5.2.3
v5.20.0
v5.21.0
v5.22.10
v5.22.6
v5.23.0
v5.24.0
v5.25.0
v5.25.3
v5.25.5
v5.26.0
v5.26.1
v5.26.2
v5.26.3
v5.26.4
v5.27.0
v5.28.0
v5.3.0
v5.30.0
v5.30.1
v5.31.0
v5.33.0
v5.34.0
v5.35.0
v5.36.0
v5.37.0
v5.38.0
v5.39.0
v5.4.0
v5.40.0
v5.40.1
v5.41.0
v5.42.0
v5.42.2
v5.43.0
v5.44.0
v5.45.0
v5.45.1
v5.46.0
v5.47.0
v5.47.1
v5.48.0
v5.49.1
v5.49.3
v5.5.0
v5.51.0
v5.52.0
v5.53.0
v5.53.1
v5.53.3
v5.54.0
v5.54.1
v5.54.2
v5.55.0
v5.56.0
v5.57.0
v5.58.0
v5.59.0
v5.59.2
v5.6.0
v5.60.0
v5.61.0
v5.62.0
v5.63.0
v5.65.0
v5.66.0
v5.67.0
v5.67.1
v5.68.0
v5.69.0
v5.69.1
v5.7.0
v5.7.1
v5.70.0
v5.70.1
v5.71.0
v5.72.0
v5.73.0
v5.73.1
v5.74.0
v5.74.4
v5.75.0
v5.76.0
v5.77.0
v5.78.0
v5.79.0
v5.79.1
v5.79.2
v5.79.3
v5.79.5
v5.8.0
v5.8.1
v5.8.2
v5.8.3
v5.80.0
v5.80.2
v5.80.3
v5.80.4
v5.81.0
v5.81.1
v5.82.0
v5.82.1
v5.82.11
v5.82.12
v5.82.2
v5.82.3
v5.82.4
v5.82.6
v5.82.9
v5.83.0
v5.84.0
v5.84.1
v5.84.2
v5.85.0
v5.85.1
v5.86.0
v5.86.1
v5.86.2
v5.87.0
v5.87.1
v5.87.2
v5.88.0
v5.88.1
v5.88.2
v5.89.0
v5.89.1
v5.89.2
v5.9.0
v5.9.1
v5.9.2
v5.9.3
v5.9.4
v5.90.0
v5.91.0
v5.92.0
v5.93.0
v5.94.0
v5.94.1
v5.94.2
v5.95.0
v5.96.0
v5.96.1
v5.97.0
v5.98.0
v5.99.0
v6.*
v6.0.0
v6.0.0-alpha.2
v6.0.0-rc.0
v6.0.0-rc.1
v6.0.0-rc.2
v6.0.0-rc.3
v6.0.1
v6.0.10
v6.0.3
v6.0.4
v6.0.5
v6.0.6
v6.0.7
v6.0.8
v6.1.0
v6.10.0
v6.10.3
v6.11.0
v6.12.0
v6.13.0
v6.13.1
v6.13.2
v6.14.0
v6.15.0
v6.16.0
v6.16.1
v6.17.0
v6.17.1
v6.18.0
v6.18.2
v6.19.0
v6.19.1
v6.19.2
v6.19.3
v6.19.4
v6.2.0
v6.20.0
v6.20.1
v6.21.0
v6.21.1
v6.21.2
v6.22.0
v6.22.1
v6.23.0
v6.24.0
v6.25.0
v6.25.1
v6.26.0
v6.27.0
v6.28.0
v6.29.0
v6.29.1
v6.3.0
v6.3.1
v6.30.0
v6.31.0
v6.32.0
v6.33.0
v6.34.0
v6.35.0
v6.36.0
v6.4.0
v6.5.0
v6.5.2
v6.5.3
v6.6.0
v6.7.0
v6.8.0
v6.8.1
v6.9.0
v6.9.2
v6.9.3

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-53943.json"