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OpenAdvisories
Medium · 6.5 CVE-2026-57576 EUVD-2026-84980GHSA-5426-92w4-wvhvPYSEC-2026-4137

plone.app.dexterity and plone.app.contenttypes have a Denial of Service due to excessive title or description length

Published Sep 22, 2026 · Updated Sep 26, 2026 · Assigned by GitHub_M

Description

plone.app.dexterity is a content-type system for the Plone content management system, and plone.app.contenttypes provides Plone’s Dexterity-based content types. Plone.app.dexterity versions through 3.2.2, 4.0.0 through 4.1.2, and 5.0.0, and plone.app.contenttypes versions through 3.0.11, 4.0.0 through 4.0.9, and 5.0.0 are vulnerable to denial of service because an authenticated user can create content with excessively long titles, descriptions, or uploaded-file names, causing Plone to become unresponsive and potentially making the resulting content difficult to edit or delete. The vulnerability is patched in plone.app.dexterity versions 3.2.3, 4.1.3, and 5.0.1, and in plone.app.contenttypes versions 3.0.12, 4.0.10, and 5.0.1.

Affected products

VendorProductAffectedFixed
plone plone.app.dexterity = 5.0.0, >= 4.0.0, < 4.1.3, < 3.2.3 —
plone plone.app.contenttypes = 5.0.0, >= 4.0.0, < 4.0.10, < 3.0.12 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI plone-app-dexterity >= 5.0.0, < 5.0.1 5.0.1 GHSA-5426-92w4-wvhv
PyPI plone-app-dexterity >= 4.0.0, < 4.1.3 4.1.3 GHSA-5426-92w4-wvhv
PyPI plone-app-dexterity < 3.2.3 3.2.3 GHSA-5426-92w4-wvhv
PyPI plone-app-dexterity < 3.2.3 · >= 4.0.0, < 4.1.3 · >= 5.0.0, < 5.0.1 3.2.3, 4.1.3, 5.0.1 PYSEC-2026-4137

References