How severe is CVE-2026-33158?

CVE-2026-33158 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-33158 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33158?

CVE-2026-33158 primarily affects Craftcms Craft Cms. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-33158?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-33158 have an EU (EUVD) identifier?

Yes. CVE-2026-33158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14936.

When was CVE-2026-33158 published?

CVE-2026-33158 was published on 2026-03-24 and last updated on 2026-06-17.

CVE-2026-33158

CVE-2026-33158 is a medium-severity vulnerability in Craftcms Craft Cms with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-639.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 4.9
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-14936
Weakness: CWE-639
Affected product: Craftcms Craft Cms
Published: 2026-03-24
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-33158?: 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.
How severe is CVE-2026-33158?: CVE-2026-33158 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-33158 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33158?: CVE-2026-33158 primarily affects Craftcms Craft Cms. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-33158?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-33158 have an EU (EUVD) identifier?: Yes. CVE-2026-33158 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-14936.
When was CVE-2026-33158 published?: CVE-2026-33158 was published on 2026-03-24 and last updated on 2026-06-17.

References

Affected products (7)

cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*
cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:*
cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*
cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*

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