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Fencer Vulns
medium 6.5

GHSA-8pcw-h6w9-h46g json

plone.app.contenttypes has a Denial of Service in File Upload due to excessive filename length

published 2026-09-23 46 d ago modified 2026-09-23 46 d ago

cvss
6.5
version 3.1, GitHub
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### Impact 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.

### Patches The problem has been patched in `plone.app.contenttypes`.

* On Plone 6.2, upgrade to `plone.app.contenttypes ` 5.0.1. * On Plone 6.1, upgrade to `plone.app.contenttypes ` 4.0.10. * On Plone 6.0, upgrade to `plone.app.contenttypes ` 3.0.12

Another part of this problem has been patched in `plone.app.dexterity`. See [this advisory](https://github.com/plone/plone.app.dexterity/security/advisories/GHSA-5426-92w4-wvhv).

### Workarounds There are no known workarounds.

This problem was responsibly reported by Aldin Visnjic to the [Plone/Zope Security Team](mailto:security@plone.org). Thank you!

Note: The Plone/Zope Security team felt that the kind of fixes that were needed could be disruptive in corner cases if they were not careful. So they decided to develop the fixes publicly, giving the whole community the chance the review, and giving them the benefit from early feedback.

Patch / fix

  • pypi plone-app-contenttypes 3.0.12, 4.0.10, 5.0.1

CVSS scores

assigned by version score vector
GitHub 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi plone-app-contenttypes
>=5.0.0, <5.0.1
>=4.0.0, <4.0.10
<3.0.12
5.0.1
4.0.10
3.0.12

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.