Vulnerabilities in pkg:pypi/plone.app.dexterity
PACKAGECVE-2026-57576 is a MODERATE (CVSS 6.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Plone.app.dexterity libraries in the PyPI ecosystem. The issue involves plone.app.dexterity has a denial of service due to excessive title or description length. Remediation is available by upgrading affected packages to version 5.0.1, 4.1.3, 3.2.3.
pkg:pypi/plone.app.dexterity
Vulnerability advisories affecting package pkg:pypi/plone.app.dexterity. Select an advisory below to view technical details or fixes.
| Advisory ID | CVE / NVD | Severity | Summary |
|---|---|---|---|
| GHSA-5426-92w4-wvhv | CVE-2026-57576 | MODERATE | plone.app.dexterity has a Denial of Service due to excessive title or description length |
| GHSA-wq6x-g685-w5f2 | CVE-2020-28734 | HIGH | Improper Restriction of XML External Entity Reference in Plone |
| GHSA-x7wf-5mjc-6x76 | CVE-2020-28735 | HIGH | SSRF attacks via tracebacks in Plone |
| GHSA-2c8c-84w2-j38j | CVE-2020-28736 | HIGH | Improper Restriction of XML External Entity Reference in Plone |
CVE-2026-57576 at a Glance
Security Impact
CVSS: 6.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
How to Fix CVE-2026-57576
To remediate this vulnerability, upgrade all affected Plone.app.dexterity dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
pip install plone.app.dexterity>=5.0.1
pip install plone.app.dexterity>=4.1.3
pip install plone.app.dexterity>=3.2.3
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
pip show plone.app.dexterity
How to Check if You Are Affected
To determine whether your Python environment is affected by CVE-2026-57576, inspect your installed packages using pip:
pip show plone.app.dexterity
Analyze the terminal output to locate any version of Plone.app.dexterity in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 5.0.1), your application is affected.
Note: The pip show plone.app.dexterity command checks currently installed packages in your active Python environment.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Plone.app.dexterity, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-57576 Affected Plone.app.dexterity Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
plone.app.dexterity
|
PyPI |
≥ 5.0.0
< 5.0.1
All 1 versions
5.0.0
|
5.0.1
|
|
plone.app.dexterity
|
PyPI |
≥ 4.0.0
< 4.1.3
|
4.1.3
|
|
plone.app.dexterity
|
PyPI |
< 3.2.3
|
3.2.3
|
References
Frequently Asked Questions
What is CVE-2026-57576?
Which Plone.app.dexterity versions are affected?
What version fixes CVE-2026-57576?
Is plone.app.dexterity affected?
What is the CVSS score of CVE-2026-57576?
What CWE is associated with CVE-2026-57576?
How can I check PyPI dependencies for CVE-2026-57576?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-5426-92w4-wvhv",
"modified" : "2026-09-23T21:48:22Z",
"published" : "2026-09-23T21:48:22Z",
"aliases" : [ "CVE-2026-57576" ],
"summary" : "plone.app.dexterity has a Denial of Service due to excessive title or description length",
"details" : "### Impact\nWhen creating content with a very large title or description field, Plone can become unresponsive. Even if the content loads, it can be hard to edit or delete, because the UI is unwieldy.\n\n### Patches\nThe problem has been patched in `plone.app.dexterity`.\n\n* On Plone 6.2, upgrade to `plone.app.dexterity` 5.0.1.\n* On Plone 6.1, upgrade to `plone.app.dexterity` 4.1.3.\n* On Plone 6.0, upgrade to `plone.app.dexterity` 3.2.3.\n\nAnother part of this problem has been patched in `plone.app.contenttypes`. See [this advisory](https://github.com/plone/plone.app.contenttypes/security/advisories/GHSA-8pcw-h6w9-h46g).\n\n### Workarounds\nThere are no known workarounds.\n\nThis problem was responsibly reported by Aldin Visnjic to the [Plone/Zope Security Team](mailto:security@plone.org). Thank you!\n\nNote: 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.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "PyPI",
"name" : "plone.app.dexterity"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.0.0"
}, {
"fixed" : "5.0.1"
} ]
} ],
"versions" : [ "5.0.0" ]
}, {
"package" : {
"ecosystem" : "PyPI",
"name" : "plone.app.dexterity"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "4.0.0"
}, {
"fixed" : "4.1.3"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 4.1.2"
}
}, {
"package" : {
"ecosystem" : "PyPI",
"name" : "plone.app.dexterity"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "3.2.3"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 3.2.2"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/security/advisories/GHSA-5426-92w4-wvhv"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-57576"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/pull/433"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/commit/0d317df663823445200d0569a66a95b7e4a9c50d"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/commit/2fdceb120ca86682a408f3a14753cfcf5126d9d9"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/commit/411689047f9a3521899ae6992a9b0efbd0592a8f"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/commit/cbcef731c0882146b9bf30688cdc639d879878fb"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/commit/f3596538cf7670bb8bc27b0dfa0b1da41c8b8a3a"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/commit/fb45bfdb18f1dfb3ed55e477947a3df9a6ee9e20"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/plone/plone.app.dexterity"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/releases/tag/3.2.3"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/releases/tag/4.1.3"
}, {
"type" : "WEB",
"url" : "https://github.com/plone/plone.app.dexterity/releases/tag/5.0.1"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-400" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-09-23T21:48:22Z",
"nvd_published_at" : "2026-09-22T23:17:07Z"
}
}