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GHSA-8pcw-h6w9-h46g: plone.app.contenttypes has a Denial of Service in File Upload due to excessive filename length

September 23, 2026

When creating an Image or File with a very large filename, Plone can become unresponsive. Even if the content loads, it can be hard to edit or delete, because the UI is unwieldy.

References

  • github.com/advisories/GHSA-8pcw-h6w9-h46g
  • github.com/plone/plone.app.contenttypes/commit/13dc98a578341aac24a1e65fd9bc7ac8a07d168a
  • github.com/plone/plone.app.contenttypes/commit/21bae6ebe424689eeac9a5884fc0da35f4944e63
  • github.com/plone/plone.app.contenttypes/commit/639c0619f371df578e69ec94e5ca98e60fd6ed58
  • github.com/plone/plone.app.contenttypes/commit/7bb03e8ec6c6bd0e645f445b0755e85a51afb158
  • github.com/plone/plone.app.contenttypes/commit/bed1547d4f8b1fc995f2c76f30ba5f20276a8ad6
  • github.com/plone/plone.app.contenttypes/pull/744
  • github.com/plone/plone.app.contenttypes/releases/tag/3.0.12
  • github.com/plone/plone.app.contenttypes/releases/tag/4.0.10
  • github.com/plone/plone.app.contenttypes/releases/tag/5.0.1
  • github.com/plone/plone.app.contenttypes/security/advisories/GHSA-8pcw-h6w9-h46g

Code Behaviors & Features

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Affected versions

All versions before 3.0.12, all versions starting from 4.0.0 before 4.0.10, all versions starting from 5.0.0 before 5.0.1

Fixed versions

  • 3.0.12
  • 4.0.10
  • 5.0.1

Solution

Upgrade to versions 3.0.12, 4.0.10, 5.0.1 or above.

Impact 6.5 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-400: Uncontrolled Resource Consumption

Source file

pypi/plone.app.contenttypes/GHSA-8pcw-h6w9-h46g.yml

Spotted a mistake? Edit the file on GitLab.

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