CVE-2026-53945 json
Ghost: Server-side request forgery via DNS rebinding in external request handling
published 4mo ago modified 17d ago also BIT-ghost-2026-53945 , EUVD-2026-39024 , GHSA-ch52-px8q-f22j
- cvss
- 4.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm ghost 6.21.2
- bitnami ghost 6.21.1
- ghost ghost 6.21.1
- github.com/TryGhost/Ghost@07d6041 commit
- github.com/TryGhost/Ghost#26754 pull request
- github.com/TryGhost/Ghost/releases/tag/v6.21.1 release
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N |
| GitHub | 3.1 | 4.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N |
| OSV | 3.1 | 4.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | ghost | >=6.0.9, <6.21.2 |
6.21.2 |
| bitnami | ghost | >=6.0.9, <6.21.1 |
6.21.1 |
Affected products
- TryGhost Ghost
Classification
References
-
github.com
/TryGhost/Ghost/pull/26754
web
-
github.com
/TryGhost/Ghost/commit/07d604100eb3df5c9b382fce6232928c96329448
web
-
github.com
/TryGhost/Ghost/security/advisories/GHSA-ch52-px8q-f22j
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-53945
advisory, web
-
github.com
/TryGhost/Ghost
package
-
github.com
/TryGhost/Ghost/releases/tag/v6.21.1
web
Sources
- CVE List CVE-2026-53945
- GitHub Advisory GHSA-ch52-px8q-f22j
- NVD CVE-2026-53945
- OSV BIT-ghost-2026-53945
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.