GHSA-8pcw-h6w9-h46g: plone-app-contenttypes

Package	Ecosystem	Affected	Fixed in
plone-app-contenttypes	PyPI	>=5.0.0, <5.0.1 \|\| >=4.0.0, <4.0.10 \|\| <3.0.12	5.0.1, 4.0.10, 3.0.12

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of plone.app.contenttypes before 3.0.12, from 4.0.0 before 4.0.10, and from 5.0.0 before 5.0.1 are affected. An attacker who can create an Image or File with a very large filename can make Plone unresponsive, and the affected content is then hard to edit or delete. Upgrade to 3.0.12, 4.0.10, or 5.0.1, matching your Plone version. The source lists no workarounds.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	GitHub Advisory Database

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 14:09 UTC First seen by agentprime
31 Oct 2026, 14:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.