---
title: "CVE-2026-57149: plone.app.portlets Vulnerable to Remote Code Execution via TALES Injection"
url: https://erroneo.us/security/cve/CVE-2026-57149/
description: "CVE-2026-57149 (plone.app.portlets (PyPI)): plone.app.portlets.portlets provides a Plone-specific user interface for plone.portlets, as well as a standard…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-22
date_modified: 2026-09-23
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-57149"
kev: false
cvss: 9.9
epss: 0.00638
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-57149: plone.app.portlets Vulnerable to Remote Code Execution via TALES Injection

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.6% , percentile 50: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 50% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes plone.app.portlets (PyPI) >= 7.0.0, <= 7.0.1, fixed in 7.0.2 ; plone.app.portlets (PyPI) >= 6.0.0, <= 6.0.3, fixed in 6.0.4 ; plone.app.portlets (PyPI) >= 5.0.0, <= 5.0.7, fixed in 5.0.8 . Check your lockfile, including transitive dependencies.

## What it is

plone.app.portlets.portlets provides a Plone-specific user interface for plone.portlets, as well as a standard set of portlets that ship with Plone. Starting in version 5.0.0 and prior to versions 5.0.8, 6.0.4, and 7.0.2, the Classic portlet (plone.app.portlets.portlets.classic) used its user-supplied template/macro fields to build a TALES path expression that was then evaluated by the TAL path() helper. Because the value was interpreted as a full TALES expression, a user able to add or edit a Classic portlet could supply a crafted value that escapes simple path traversal and is evaluated as arbitrary code. This is exploitable by any authenticated user who can configure a Classic portlet - which, with the default role map, includes regular users on their personal dashboard. The result is code execution in the context of the Plone process, i.e. a privilege escalation across the trust boundary between an authenticated web user and the server-side process. The problem has been patched in plone.app.portlets 5.0.8, 6.0.4, and 7.0.2. Some workarounds are available. Restrict who can manage portlets: remove the plone.app.portlets.ManageOwnPortlets permission from untrusted roles, and limit Manage portlets to trusted administrators (usually this is already restricted to the Manager and Site Administrator roles). Where the Classic portlet is not needed, unregister it so it cannot be added. This would need to be done by editing a portlets.xml in your own code. One may also effectively disable showing the classic portlet by customising its template. In the Zope Management Interface go to the portalviewcustomizations tool, locate the classic.pt template and click it. Click the Customize button. Remove all text and replace it with The classic portlet was disabled. . (This is not a recommended way of customizing a template, but in this case it is quite effective.)

## Affected packages

- PyPI `plone.app.portlets` >= 7.0.0, <= 7.0.1 → fixed: 7.0.2
- PyPI `plone.app.portlets` >= 6.0.0, <= 6.0.3 → fixed: 6.0.4
- PyPI `plone.app.portlets` >= 5.0.0, <= 5.0.7 → fixed: 5.0.8

## Affected products (CVE record)

- plone plone.app.portlets: >= 7.0.0, < 7.0.2, >= 6.0.0, < 6.0.4, >= 5.0.0, < 5.0.8

## Severity

- GitHub_M CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.64% probability of exploitation activity in the next 30 days; percentile 50.

## Sources

- [GitHub Advisory GHSA-rr49-f9g6-c9r5](https://github.com/advisories/GHSA-rr49-f9g6-c9r5)
- [CVE.org record CVE-2026-57149](https://www.cve.org/CVERecord?id=CVE-2026-57149)
- [NVD entry CVE-2026-57149](https://nvd.nist.gov/vuln/detail/CVE-2026-57149)
- [github.com](https://github.com/plone/plone.app.portlets/security/advisories/GHSA-rr49-f9g6-c9r5)
- [github.com](https://github.com/plone/plone.app.portlets/commit/1d9cacacfad9ed08b890dadc6e75741e295dc151)
- [github.com](https://github.com/plone/plone.app.portlets/commit/8a0641dc4054a2b13834bba00c67cd9a2fd189e1)
- [github.com](https://github.com/plone/plone.app.portlets/commit/fb979f01b57dd2fc06c90ee6577eb5eb285da8f1)
- [github.com](https://github.com/plone/plone.app.portlets/releases/tag/5.0.8)
- [github.com](https://github.com/plone/plone.app.portlets/releases/tag/6.0.4)
- [github.com](https://github.com/plone/plone.app.portlets/releases/tag/7.0.2)

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Source page: https://erroneo.us/security/cve/CVE-2026-57149/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt