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CVE-2026-56385

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 5.9.1
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:d93d6483e93aac09183b6d2f8d358340f9ace41d9c2695c8d56eaf767e689445
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:composer/craftcms/cms","product":"cms","vendor":"craftcms","versions":[{"lessThan":"5.9.14","status":"affected","version":"5.0.0-RC1","versionType":"semver"},{"status":"unaffected","version":"5.9.14","versionType":"semver"},{"lessThan":"4.17.8","status":"affected","version":"4.0.0-RC1","versionType":"semver"},{"status":"unaffected","version":"4.17.8","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-639","description":"Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27","tags":["patch"],"url":"https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/references/1
{"name":"GHSA Advisory GHSA-44px-qjjc-xrhq","tags":["vendor-advisory"],"url":"https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/references/0
{"name":"VulnCheck Advisory: Craft CMS - Authorization Bypass in assets/preview-file Endpoint","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:47d8152e71c0517c9254ed18e2aa0fcef6b5dccd4fb3c3b529b6287c97107d0b · sha256:53057917f93afbbc… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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