CVE-2026-113666 ApostropheCMS - Prototype Pollution

ApostropheCMS < 4.33.0 and db-connect < 1.1.0 contain a prototype pollution caused by traversal through constructor prototype chain in projection exclusion path, letting attackers with view-draft access cause persistent process-wide integrity and availability effects, exploit requires logged-in account with view-draft access.

CVSS base score 7.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
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Details

Type
Prototype Pollution
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Published
20 October 2026
Updated
21 October 2026
Weakness
CWE-400

Vendor fix

Upgrade to db-connect 1.1.0 and ApostropheCMS 4.33.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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