CVE-2026-56385

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2026-06-21. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 4.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8.

CVSS v3
4.3
EG Score
4.3MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100

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
Severity43% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.4%
EPSS %ILE
27th
KEV
Not listed

Published

June 21, 2026

Last Modified

June 22, 2026

Advisory Details (3)

Auto-updated Jun 27, 2026
Patch available. Sources: github_commit, github.
generic

Craft CMS - Authorization Bypass in assets/preview-file Endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint
githubMentions a patch (unverified)

Authorized asset "preview file" requests bypass allows users without asset access to retrieve private preview metadata · Advisory · craftcms/cms · GitHub

https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq
github_commit Patch Available

commit d30df3112220 (craftcms/cms)

Patch available: craftcms/cms 5.9.21 (contains commit d30df3112220)

https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27

Vendor Advisories for CVE-2026-56385(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)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
craftcms/cms4.0.0 ... 4.9.7 (239 versions)
  • 5.0.0-RC1 up to 5.9.14: fixed in 5.9.14
  • 4.0.0-RC1 up to 4.17.8: fixed in 4.17.8
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 27× 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 181 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-56385?
CVE-2026-56385 is a medium vulnerability published on June 21, 2026. Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled…
When was CVE-2026-56385 disclosed?
CVE-2026-56385 was first published on June 21, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56385 actively exploited?
CVE-2026-56385 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (27th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56385?
CVE-2026-56385 has a CVSS base score of 4.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-56385?
A fix for CVE-2026-56385 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56385 are linked in the Vendor Advisories panel on this page.

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