CVE-2026-53945: tryghost ghost
CVSS: 4.0v3.1MediumDeferred
AliasesGHSA-ch52-px8q-f22jBIT-ghost-2026-53945
Published 24-06-2026Last modified 25-06-2026
Vulnerability summary
CVE-2026-53945 is a medium (CVSS 4.0) vulnerability in tryghost ghost. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 11.1% of scored vulnerabilities.
CVSS score
4.0/10
010
Medium · v3.1 (CVE.org)EPSS score
0.21%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 24-06-2026PublishedVulnerability first disclosed.
- 25-06-2026Last modifiedVulnerability information updated.
Description
Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, Ghost’s private-IP check for outbound HTTP requests could be bypassed via DNS rebinding, allowing an attacker to coerce the Ghost server into reaching hosts on internal networks through features that issue external fetches. This vulnerability is fixed in 6.21.1.
CVSS metrics
3 scores · 3 sources · 1 versionMedium 4.0Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:NSourcesAll 3 agree
- OSV · NpmEcosystem advisory · calculated4.0MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
- NVDNIST4.0MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
11%
Versus all other CVEs
30-day change
0.00 pp
From 0.21% on 21-09-2026
21-09-202621-10-2026
EPSS score0.21%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionThe product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.
- CWE-918Server-Side Request Forgery (SSRF)The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
Affected systems
Npm1 product
- ghost≥ 6.0.9, < 6.21.2
Tryghost1 product
- ghost≥ 6.0.9, < 6.21.1
2 vendors · 2 products
References
6 links
- github.com/TryGhost/GhostPACKAGE