How severe is CVE-2026-78416?

CVE-2026-78416 has a CVSS 4.0 base score of 8.7, rated high severity.

Is CVE-2026-78416 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-78416?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-78416 published?

CVE-2026-78416 was published on 2026-08-24 and last updated on 2026-08-28.

CVE-2026-78416

CVE-2026-78416 is a high-severity vulnerability with a CVSS 4.0 base score of 8.7. 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-915.

Key facts

Severity: High (CVSS 4.0 base score 8.7)
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-915
Published: 2026-08-24
Last modified: 2026-08-28

Description

Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in control panel element-search condition handling. A JSON cleanse bypass in condition.config allows Yii behavior/event configuration keys to be interpreted after decoding, enabling command execution as the PHP/web user.

Frequently asked questions

What is CVE-2026-78416?: Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in control panel element-search condition handling. A JSON cleanse bypass in condition.config allows Yii behavior/event configuration keys to be interpreted after decoding, enabling command execution as the PHP/web user.
How severe is CVE-2026-78416?: CVE-2026-78416 has a CVSS 4.0 base score of 8.7, rated high severity.
Is CVE-2026-78416 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-78416?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-78416 published?: CVE-2026-78416 was published on 2026-08-24 and last updated on 2026-08-28.

References

Other CWE-915 vulnerabilities

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CVE-2026-33453 — Critical (CVSS 10.0): Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Apache Camel Camel-Coap…
CVE-2025-58367 — Critical (CVSS 10.0): DeepDiff is a project focused on Deep Difference and search of any Python data. Versions 5.0.0 through 8.6.0 are…
CVE-2026-56142 — Critical (CVSS 9.9): In JetBrains Hub before 2026.1.13757, 2025.3.148033, 2025.2.148048, 2025.1.148120, 2024.3.148430, 2024.2.148429…
CVE-2026-72710 — Critical (CVSS 9.8): SPIP before 4.4.18 contains a mass assignment vulnerability in the editer_objet action that allows unauthenticated…
CVE-2026-12535 — Critical (CVSS 9.8): Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Formatter Field…

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