---
id: CVE-2026-111687
title: WeRSS (we-mp-rss) through 1.5.3 RCE via template Parameter in /rss Endpoint
summary: >-
  WeRSS (we-mp-rss) through 1.5.3 contains a remote code execution vulnerability
  that allows unauthenticated attackers to run code via the template parameter
  of the public GET /rss/{feed_id} endpoint. Attackers can supply a non-built-in
  ex…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-95
vendor: rachelos
product: we-mp-rss
affected:
  - we-mp-rss <= 1.5.3
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-16T19:04:57.256748Z'
exploitAvailable: true
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T19:05:43.558Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111687'
references:
  - url: 'https://hackmd.io/@hieuPenguinnn/werss-rss-template-unauth-ssti-rce'
  - url: >-
      https://github.com/rachelos/we-mp-rss/blob/v1.5.3/core/lax/template_parser.py#L1150-L1166
  - url: 'https://github.com/rachelos/we-mp-rss/blob/v1.5.3/apis/rss.py#L185-L198'
  - url: >-
      https://www.vulncheck.com/advisories/werss-we-mp-rss-through-1.5.3-rce-via-template-parameter-in-rss-endpoint
    label: >-
      VulnCheck Advisory: WeRSS (we-mp-rss) through 1.5.3 RCE via template
      Parameter in /rss Endpoint
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-10-16T18:43:08.657Z'
---

## Overview

WeRSS (we-mp-rss) through 1.5.3 contains a remote code execution vulnerability that allows unauthenticated attackers to run code via the template parameter of the public GET /rss/{feed_id} endpoint. Attackers can supply a non-built-in ext value and a {{=expression}} template whose object-subclass traversal bypasses the eval denylist to run OS commands as the service account.

## Affected

- `we-mp-rss <= 1.5.3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.