Is CVE-2026-57576 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57576 being exploited in the wild.

How severe is CVE-2026-57576?

Medium severity, with a CVSS score of 6.5, published 22 September 2026.

Which products and versions are affected?

plone.app.dexterity (PyPI) ECOSYSTEM:introduced=0,fixed=3.2.3,introduced=4.0.0,fixed=4.1.3,introduced=5.0.0,fixed=5.0.1, ECOSYSTEM:introduced=5.0.0,fixed=5.0.1.

Is there a fix for CVE-2026-57576?

Yes. plone.app.dexterity (PyPI): upgrade to 5.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-57576 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-57576?

Check whether you run plone.app.dexterity (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-57576: Plone plone.app.dexterity denial of service via excessive field length

CVE-2026-57576 · Severity: medium · CVSS 6.5 · Published 2026-09-22

plone.app.dexterity is a content management component used in Plone CMS to define and manage content types and their fields. An attacker with low privileges can create content with excessively long title or description fields, causing the Plone server to become unresponsive and making affected content difficult to edit or delete, resulting in denial of service to legitimate users.

Technologies: plone.app.dexterity (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2026-57576 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57576 being exploited in the wild.
How severe is CVE-2026-57576?: Medium severity, with a CVSS score of 6.5, published 22 September 2026.
Which products and versions are affected?: plone.app.dexterity (PyPI) ECOSYSTEM:introduced=0,fixed=3.2.3,introduced=4.0.0,fixed=4.1.3,introduced=5.0.0,fixed=5.0.1, ECOSYSTEM:introduced=5.0.0,fixed=5.0.1.
Is there a fix for CVE-2026-57576?: Yes. plone.app.dexterity (PyPI): upgrade to 5.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57576 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-57576?: Check whether you run plone.app.dexterity (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

plone.app.dexterity (PyPI): upgrade to 5.0.1 or later
```
pip install "plone.app.dexterity>=5.0.1"
```

Technical details

This is an uncontrolled resource consumption vulnerability (CWE-400) in plone.app.dexterity's handling of title and description fields. When content is created with extremely large values in these fields, the application fails to properly validate or limit field length, causing excessive memory or processing resource consumption. An authenticated user (low privilege required) can trigger this via the network without user interaction. The result is server unresponsiveness and UI degradation, preventing normal content management operations. Patches are available in versions 5.0.1 (for Plone 6.2), 4.1.3 (for Plone 6.1), and 3.2.3 (for Plone 6.0).

Affected products

Plone plone.app.dexterity 5.0.0; 4.0.0 to 4.1.2; up to 3.2.2

Identifiers

CVE-2026-57576
GHSA-5426-92w4-wvhv
PYSEC-2026-4137

Timeline

2026-06-23: disclosed
2026-09-23: advisory

References

https://api.github.com/users/viliald

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