Skip to content
Heist/ feed
Medium

ApostropheCMS: Host header controls server-side image fetch origin in @apostrophecms/ai-helper, enabling authenticated SSRF

Type: advisorySource: Official CVE List1 source record

ApostropheCMS is an open-source Node.js content management system. From 1.0.0-beta.10 until 1.0.0-beta.13 of the AI helper, an editor with image-generation capability can create a base64-generated image record without a stored provider URL and invoke image acceptance on a deployment using local relative storage with no trusted global base URL. The server resolves the fixed uploads path against a request-controlled Host-derived origin, enabling bounded server-side requests to an attacker-selected host, port, and HTTP origin, but not arbitrary-path retrieval or the stored-provider and absolute-storage configurations. This issue is fixed in AI helper 1.0.0-beta.13.

Announced Source revision 1
Original source ↗

CVE-2026-113671

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-113671

apostrophe

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

ai-helper

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "apostrophecms",
    "product": "apostrophe",
    "versions": [
      {
        "status": "affected",
        "version": ">= 4.25.0, < 4.33.0"
      }
    ]
  },
  {
    "vendor": "@apostrophecms",
    "product": "ai-helper",
    "versions": [
      {
        "status": "affected",
        "version": ">= 1.0.0-beta.10, < 1.0.0-beta.13"
      }
    ]
  }
]
Related CVEs
CVE-2026-113671

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#42459 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement