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Fencer Intel
medium 4.3

CVE-2026-70596 json

Ghost: Cross-Site Scripting in Feature Image Captions

published 3mo ago modified 18d ago also BIT-ghost-2026-70596 , EUVD-2026-53391 , GHSA-pr22-p9rp-2cqv

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 25%
public exploits
0
none known

Summary

Ghost is a Node.js content management system. From 4.9.0 until 6.54.1, an input validation issue allowed any staff user to create a post with content in feature_image_caption that could be used to hijack another staff user's Ghost Admin session, resulting in privilege escalation. This issue is fixed in 6.54.1.

Patch / fix

  • npm ghost 6.54.1
  • bitnami ghost 6.54.1
  • ghost ghost 6.54.1

Is CVE-2026-70596 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3mo ago

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 25% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
OSV 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
npm ghost
>=4.9.0, <6.54.1
6.54.1
bitnami ghost
>=4.9.0, <6.54.1
6.54.1

Affected products

  • TryGhost Ghost

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

References

Sources

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.