Which products and versions are affected by CVE-2026-46725?

Affected: mmc/ceselector (composer) versions >= 6.0.0. The full list is in the CVE brief.

Is CVE-2026-46725 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2026-46725 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2026-46725?

No public exploit code is known.

Is there a fix for CVE-2026-46725?

Fixed versions are available, including mmc/ceselector 3.0.3, mmc/ceselector 4.0.2, mmc/ceselector 5.0.1.

How urgently should CVE-2026-46725 be patched?

Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

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Vulnerability Intelligence

CVE-2026-46725

Critical

Remote Code Execution in extension "Content Element Selector" (ceselector)

Published May 19, 2026 · Updated Sep 10, 2026 · Also known as GHSA-8x3j-439w-537c

Key Facts

Patch in the next maintenance window

CVE-2026-46725 is a critical-severity vulnerability (CVSS 9.2 v4) affecting mmc/ceselector (composer).
It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
EPSS estimates a 1.9% probability of exploitation in the next 30 days.
Fixed versions are available, including mmc/ceselector 3.0.3, mmc/ceselector 4.0.2, mmc/ceselector 5.0.1.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

CVSS v4

9.2

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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

EPSS (30-day exploit likelihood)

1.9%

Higher than 78.8% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

None known

Get the full CVE-2026-46725 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

The extension passes an attacker-controlled cookie directly to PHP's unserialize() without safely processing the input. A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server. Exploitation requires the content element to be configured with "Persistent Mode: Static" in the plugin settings.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
mmc/ceselectorcomposer	>= 6.0.0	6.0.1

Patched Releases

mmc/ceselector

3.0.3, 4.0.2, 5.0.1, 6.0.1

Timeline

Publicly disclosed
May 19, 2026
Last updated
Sep 10, 2026

Weakness Type

CWE-502 Deserialization of Untrusted Data

References

FAQ

Common Questions.

The extension passes an attacker-controlled cookie directly to PHP's unserialize() without safely processing the input.
Affected: mmc/ceselector (composer) versions >= 6.0.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including mmc/ceselector 3.0.3, mmc/ceselector 4.0.2, mmc/ceselector 5.0.1.
Brandefense priority: patch in the next maintenance window, because of its high severity, although no exploitation is known.

Is CVE-2026-46725 Running On Your Attack Surface?

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