CVE-2026-53944

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 74% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in 6.21.1.

CVSS v3
5.8
EG Score
5.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity58% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.3%
EPSS %ILE
24th
KEV
Not listed

Published

June 24, 2026

Last Modified

June 25, 2026

Advisory Details (1)

Auto-updated Jun 24, 2026
Patch available. Sources: github.
githubMentions a patch (unverified)

Private IP filtering bypass to make server-side requests to internal services · Advisory · TryGhost/Ghost · GitHub

https://github.com/TryGhost/Ghost/security/advisories/GHSA-wvp2-4qqp-4h3r

Vendor Advisories for CVE-2026-53944(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
ghost—
  • 6.0.9 up to 6.21.1: fixed in 6.21.1
—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 142 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:12 UTCEPSS rescore
  4. 2026-10-07 23:48 UTCEPSS rescore
  5. 2026-10-06 15:18 UTCEPSS rescore
  6. 2026-10-05 17:43 UTCEPSS rescore
  7. 2026-10-04 23:22 UTCEPSS rescore
  8. 2026-10-03 14:26 UTCEPSS rescore
  9. 2026-10-02 17:56 UTCEPSS rescore
  10. 2026-10-01 19:50 UTCEPSS rescore
  11. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-29 15:22 UTCEPSS rescore
  13. 2026-09-28 13:51 UTCEPSS rescore
  14. 2026-09-27 13:48 UTCEPSS rescore
  15. 2026-09-26 15:59 UTCEPSS rescore
  16. 2026-09-24 14:04 UTCEPSS rescore
  17. 2026-09-23 17:54 UTCEPSS rescore
  18. 2026-09-23 09:51 UTCEG score recompute
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 07:47 UTCEG score recompute
  22. 2026-09-17 19:31 UTCEPSS rescore
  23. 2026-09-16 14:08 UTCEPSS rescore
  24. 2026-09-16 05:15 UTCEPSS rescore
  25. 2026-09-14 01:33 UTCEG score recompute
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  1. 2026-09-13 16:47 UTCEPSS rescore
  2. 2026-09-12 16:06 UTCEG score recompute
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-10 09:35 UTCEPSS rescore
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-04 05:06 UTCEPSS rescore
  9. 2026-09-02 14:12 UTCEPSS rescore
  10. 2026-09-01 13:54 UTCEPSS rescore
  11. 2026-09-01 04:40 UTCEPSS rescore
  12. 2026-08-30 19:50 UTCEG score recompute
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-28 03:00 UTCEG score recompute
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 21:54 UTCEG score recompute
  21. 2026-08-23 13:26 UTCEG score recompute
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-22 11:24 UTCEG score recompute
  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-21 09:13 UTCEG score recompute
  26. 2026-08-20 22:55 UTCEPSS rescore
  27. 2026-08-20 07:14 UTCEG score recompute
  28. 2026-08-19 17:04 UTCEPSS rescore
  29. 2026-08-19 01:47 UTCEG score recompute
  30. 2026-08-18 13:48 UTCEPSS rescore
  31. 2026-08-17 15:53 UTCEG score recompute
  32. 2026-08-17 13:47 UTCEPSS rescore
  33. 2026-08-16 14:56 UTCEPSS rescore
  34. 2026-08-16 13:54 UTCEG score recompute
  35. 2026-08-16 02:14 UTCEPSS rescore
  36. 2026-08-15 11:55 UTCEG score recompute
  37. 2026-08-15 01:30 UTCEPSS rescore
  38. 2026-08-14 09:56 UTCEG score recompute
  39. 2026-08-13 22:00 UTCEPSS rescore
  40. 2026-08-13 07:57 UTCEG score recompute
  41. 2026-08-12 13:51 UTCEPSS rescore
  42. 2026-08-12 05:58 UTCEG score recompute
  43. 2026-08-11 03:52 UTCEG score recompute
  44. 2026-08-11 00:00 UTCEPSS rescore
  45. 2026-08-10 01:53 UTCEG score recompute
  46. 2026-08-09 13:46 UTCEPSS rescore
  47. 2026-08-08 23:55 UTCEG score recompute
  48. 2026-08-08 16:37 UTCEPSS rescore
  49. 2026-08-07 21:56 UTCEG score recompute
  50. 2026-08-06 19:57 UTCEG score recompute
  51. 2026-08-06 13:47 UTCEPSS rescore
  52. 2026-08-05 19:17 UTCEPSS rescore
  53. 2026-08-04 15:59 UTCEG score recompute
  54. 2026-08-04 15:10 UTCEPSS rescore
  55. 2026-08-04 10:39 UTCEPSS rescore
  56. 2026-08-03 14:01 UTCEG score recompute
  57. 2026-08-03 10:36 UTCEPSS rescore
  58. 2026-08-02 09:37 UTCEG score recompute
  59. 2026-08-02 02:27 UTCEPSS rescore
  60. 2026-08-01 07:38 UTCEG score recompute
  61. 2026-08-01 04:16 UTCEPSS rescore
  62. 2026-07-31 04:37 UTCEG score recompute
  63. 2026-07-30 16:28 UTCEPSS rescore
  64. 2026-07-30 02:38 UTCEG score recompute
  65. 2026-07-30 01:30 UTCEPSS rescore
  66. 2026-07-29 00:39 UTCEG score recompute
  67. 2026-07-28 15:37 UTCEPSS rescore
  68. 2026-07-27 17:33 UTCEG score recompute
  69. 2026-07-26 15:23 UTCEG score recompute
  70. 2026-07-26 14:54 UTCEPSS rescore
  71. 2026-07-25 14:18 UTCEPSS rescore
  72. 2026-07-24 14:18 UTCEPSS rescore
  73. 2026-07-23 14:18 UTCEPSS rescore
  74. 2026-07-23 03:19 UTCEG score recompute
  75. 2026-07-22 14:08 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-53944?
CVE-2026-53944 is a medium vulnerability published on June 24, 2026. Ghost is a Node.js content management system. From 6.0.9 until 6.21.1, when making an external request, it is possible to bypass the IP filter that ensures the request isn't going to an internal service using an IPv6 literal which maps to a private IPv4 address. This vulnerability is fixed in…
When was CVE-2026-53944 disclosed?
CVE-2026-53944 was first published on June 24, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53944 actively exploited?
CVE-2026-53944 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (24th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53944?
CVE-2026-53944 has a CVSS base score of 5.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53944?
A fix for CVE-2026-53944 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-53944 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-53944

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