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CVE-2026-33158

Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)

4.9 MediumFix available

Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, a low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view. The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files. This issue has been patched in versions 4.17.8 and 5.9.14.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.36%Up 0.3 points since Mar 25, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.9

Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)

Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, a low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view. The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files. This issue has been patched in versions 4.17.8 and 5.9.14.

Record
CVE-2026-33158
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-639
Updated
2026-11-02
EUVDEUVD-2026-14936 4.9

Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, a low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view. The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files. This issue has been patched in versions 4.17.8 and 5.9.14.

Record
EUVD-2026-14936
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Updated
2026-11-02
GitHub AdvisoriesGHSA-3pvf-vxrv-hh9c 4.9

Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)

Summary

A low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view.

The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files.

Details

Root cause:

  • A user-controlled object reference (assetId) is used to load and return sensitive content.
  • The action does not verify whether the current user is authorized to view that asset.
  • This creates an authenticated IDOR / authorization bypass.

Impact

  • Craft installations where private/non-public assets exist and low-privileged users can authenticate.

Resources

https://github.com/craftcms/cms/commit/7290d91639e

Record
GHSA-3pvf-vxrv-hh9c
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-639
Updated
2026-11-02
NVD 4.9

Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, a low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view. The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files. This issue has been patched in versions 4.17.8 and 5.9.14.

Record
CVE-2026-33158
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-639
Updated
2026-11-02
OSV 4.9

Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)

Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, a low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view. The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files. This issue has been patched in versions 4.17.8 and 5.9.14.

Record
CVE-2026-33158
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-639
Updated
2026-11-02
OSVGHSA-3pvf-vxrv-hh9c 4.9

Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)

Summary

A low-privileged authenticated user can read private asset content by calling assets/edit-image with an arbitrary assetId that they are not authorized to view.

The endpoint returns image bytes (or a preview redirect) without enforcing a per-asset view authorization check, leading to potential unauthorized disclosure of private files.

Details

Root cause:

  • A user-controlled object reference (assetId) is used to load and return sensitive content.
  • The action does not verify whether the current user is authorized to view that asset.
  • This creates an authenticated IDOR / authorization bypass.

Impact

  • Craft installations where private/non-public assets exist and low-privileged users can authenticate.

Resources

https://github.com/craftcms/cms/commit/7290d91639e

Record
GHSA-3pvf-vxrv-hh9c
CVSS 4.0
4.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-639
Updated
2026-11-02
OSVCLSA-2026-1784682948 No score

TuxCare security update for craftcms/cms (14 CVEs)

TuxCare rebuilt craftcms/cms to address 14 CVEs. Fixed in 3.9.15-p7+tuxcare.

Record
CLSA-2026-1784682948
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
craftcms/cms
Packagist
 4.0.0-RC1 to 4.17.7
4.17.8
craftcms/cms
Packagist
 5.0.0-RC1 to 5.9.13
5.9.14
craftcms/cms
TuxCare:Packagist
From an advisory covering 12 CVEs
 3.9.15 up to 3.9.15-p7+tuxcare, plus listed versions
3.9.15-p1+tuxcare3.9.15-p2+tuxcare3.9.15-p3+tuxcare3.9.15-p4+tuxcare3.9.15-p5+tuxcare3.9.15-p6+tuxcare
3.9.15-p7+tuxcare
craftcms/cms
Packagist
 4.0.0-RC1 up to 4.17.8, plus listed versions
4.0.04.0.0-RC24.0.0-RC34.0.0.14.0.1
Show 45 moreShow less
4.0.24.0.34.0.44.0.54.0.5.14.0.5.24.0.64.1.04.1.0.14.1.0.24.1.14.1.24.1.34.1.44.1.4.14.10.04.10.0-beta.14.10.0-beta.24.10.14.10.24.10.34.10.44.10.54.10.64.10.74.10.84.11.04.11.0.14.11.0.24.11.14.11.24.11.34.11.44.11.54.12.04.12.14.12.24.12.34.12.44.12.4.14.12.54.12.64.12.6.14.12.74.12.8
4.17.8
craftcms/cms
Packagist
 5.0.0-RC1 up to 5.9.14, plus listed versions
5.0.05.0.15.0.25.0.35.0.4
Show 45 moreShow less
5.0.55.0.65.1.05.1.15.1.105.1.25.1.35.1.45.1.55.1.65.1.75.1.85.1.95.2.05.2.0-beta.15.2.0-beta.25.2.0-beta.35.2.0-beta.45.2.0-beta.55.2.0-beta.65.2.15.2.105.2.25.2.35.2.45.2.4.15.2.55.2.65.2.75.2.85.2.95.3.05.3.0-beta.15.3.0-beta.25.3.0.15.3.0.25.3.0.35.3.15.3.25.3.35.3.45.3.55.3.65.4.05.4.0.1
5.9.14

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-33158 is a medium vulnerability (CVSS 4.9) in Craftcms Cms, published March 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 29th percentile. Fixed in craftcms/cms 4.17.8.

References

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Left out here: 298 versions. The JSON record has them.

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