# CVE-2026-57576 — plone plone.app.dexterity

> As of 2026-09-22, CVE-2026-57576 is a MEDIUM-severity vulnerability in plone plone.app.dexterity, CVSS v3.1 6.5, EPSS 0.7% (53.3th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-57576 as of 2026-09-22; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-22

## What is CVE-2026-57576?

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.

The record classifies CVE-2026-57576 under weakness class [CWE-400](https://intel.threadlinqs.com/cwe/CWE-400). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 13 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.5 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **EPSS (FIRST):** 0.7% probability of exploitation in the next 30 days, higher than 53.3% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-22

## Is CVE-2026-57576 being exploited?

It currently carries a trending score of 43 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **plone**: plone.app.dexterity, plone.app.contenttypes

## How to fix CVE-2026-57576

No vendor patch reference has been recorded for CVE-2026-57576 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-57576

No threat campaign in the Threadlinqs corpus currently references CVE-2026-57576, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS, NVD. Last verified by Threadlinqs on 2026-09-24. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/plone/plone.app.dexterity/security/advisories/GHSA-5426-92w4-wvhv)

**Other references**

- [github.com](https://github.com/plone/plone.app.contenttypes/security/advisories/GHSA-8pcw-h6w9-h46g)
- [github.com (13dc98a578341aac24a1e65fd9bc7ac8a07d168a)](https://github.com/plone/plone.app.contenttypes/commit/13dc98a578341aac24a1e65fd9bc7ac8a07d168a)
- [github.com (21bae6ebe424689eeac9a5884fc0da35f4944e63)](https://github.com/plone/plone.app.contenttypes/commit/21bae6ebe424689eeac9a5884fc0da35f4944e63)
- [github.com (639c0619f371df578e69ec94e5ca98e60fd6ed58)](https://github.com/plone/plone.app.contenttypes/commit/639c0619f371df578e69ec94e5ca98e60fd6ed58)
- [github.com (7bb03e8ec6c6bd0e645f445b0755e85a51afb158)](https://github.com/plone/plone.app.contenttypes/commit/7bb03e8ec6c6bd0e645f445b0755e85a51afb158)

_Showing 6 of 13 recorded references._

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-57576
Full detection coverage and IOCs for threats exploiting CVE-2026-57576 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp