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TYPO3 CMS CVE-2026-85400

| EUVDEUVD-2026-72675 HIGH
Missing Authorization (CWE-862)
2026-09-08 TYPO3
7.5
CVSS 4.0 · Vendor: TYPO3
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Severity by source

Vendor (TYPO3) PRIMARY
7.5 HIGH
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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
vuln.today AI
7.2 HIGH

Requires authenticated backend admin account (PR:H); full C/I/A warranted given configuration read/write access and privilege escalation to system maintainer.

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (TYPO3).

CVSS VectorVendor: TYPO3

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
X

Lifecycle Timeline

4
Metadata Corrected
Sep 08, 2026 - 10:40 vuln.today
tag: Privilege Escalation added
Source Code Evidence Fetched
Sep 08, 2026 - 09:46 vuln.today
Analysis Generated
Sep 08, 2026 - 09:46 vuln.today
CVE Published
Sep 08, 2026 - 09:18 cve.org
HIGH 7.5

DescriptionCVE.org

Backend administrators without system maintainer privileges were able to schedule any of the configuration:read, configuration:set, and configuration:show commands. This allowed them to modify arbitrary system configuration, which is normally limited to system maintainers. As a consequence, this allowed them, for example, to gain system maintainer privileges or cause a denial of service. Exploiting this vulnerability requires an administrator-level backend user account. This issue affects TYPO3 CMS versions 14.2.0-14.3.6.

AnalysisAI

Privilege escalation in TYPO3 CMS 14.2.0-14.3.6 allows backend administrators without system-maintainer privileges to schedule configuration commands (configuration:set, configuration:show, configuration:read) through the TYPO3 scheduler module, bypassing the role-based authorization that normally restricts these operations to the highest privilege tier. An attacker holding a backend administrator account can leverage this to silently elevate themselves to system-maintainer status or corrupt system configuration to trigger a denial of service. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid TYPO3 backend user account with administrator-level privileges - not anonymous access, not a low-privilege editor account. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 7.5 with PR:H correctly reflects that only authenticated backend administrators can exploit this flaw, substantially narrowing the attack surface compared to typical critical-severity findings. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The upstream fix is available in GitHub commits b8abe36978c63a0625aee70df078895216e7ee27 and e15da7ba0218532240578b471152f76c13cb4154 in the TYPO3/typo3 repository; however, no explicitly tagged patched release version was included in the advisory data, so this should be treated as an upstream fix available pending a confirmed patched release. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, audit all TYPO3 CMS installations to identify those running versions 14.2.0 through 14.3.6, prioritizing production systems. …

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CVE-2026-85400 vulnerability details – vuln.today

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