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CVE-2026-57576 medium CVSS 6.5

Vulnerability in plone.app.dexterity (CVE-2026-57576)

Summary

Vulnerability in plone.app.dexterity (CVE-2026-57576). Risk of unauthorized operations or information disclosure. Exploitable via plone.app.dexterity. Mitigation: upgrade to 3.2.3 or later.

Original description

The description as published by the source.

Impact

When 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.

Patches

The problem has been patched in plone.app.dexterity.

  • On Plone 6.2, upgrade to plone.app.dexterity 5.0.1.
  • On Plone 6.1, upgrade to plone.app.dexterity 4.1.3.
  • On Plone 6.0, upgrade to plone.app.dexterity 3.2.3.

Another part of this problem has been patched in plone.app.contenttypes. See this advisory.

Workarounds

There are no known workarounds.

This problem was responsibly reported by Aldin Visnjic to the Plone/Zope Security Team. 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.

Source: NIST National Vulnerability Database NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-57576 has been found in plone.app.dexterity.
Attackers can target a specific entry point like plone.app.dexterity over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 6.5/10.
What to do: upgrade plone.app.dexterity to 3.2.3 or later.
If unsure, ask your IT team or search "plone.app.dexterity CVE-2026-57576" on the vendor's site.

CVE-2026-57576 (plone.app.dexterity) — CWE-400 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: plone.app.dexterity / plone.app.contenttypes
Patched: 3.2.3 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-400) exists in plone.app.dexterity. Attackers reach the vulnerable code path via plone.app.dexterity.

📍 Affected scope

Check the vendor advisory for the affected versions of plone.app.dexterity. Attack surface: plone.app.dexterity / plone.app.contenttypes.

🔥 Severity

Severity: Medium (CVSS 6.5/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 3.2.3.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'plone.app.dexterity' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    grep -r 'plone.app.dexterity' . | grep -v node_modules

    リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で plone.app.dexterity を grep し、稼働しているサービス・バージョンを把握する。

  2. 2
    Apply patch patch 
    Upgrade plone.app.dexterity to 3.2.3

    ステージング環境で 3.2.3 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

pip plone.app.dexterity
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.3"}]}]

References

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