---
id: CVE-2026-110652
title: >-
  ONLYOFFICE DocumentServer before 10.0.0 contains an unauthenticated
  server-side request forgery vulnerability in the /downloadfile/:docid endpoint
  that allows remote attackers to bypass the private-IP request-filtering-agent
  by exploitin…
summary: >-
  ONLYOFFICE DocumentServer before 10.0.0 contains an unauthenticated
  server-side request forgery vulnerability in the /downloadfile/:docid endpoint
  that allows remote attackers to bypass the private-IP request-filtering-agent
  by exploitin…
severity: medium
cvss: 4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N'
cwe:
  - CWE-918
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T14:17:43.983'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110652'
references:
  - url: 'https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#1000'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/ONLYOFFICE/DocumentServer/releases/tag/v10.0.0'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/onlyoffice-documentserver-before-ssrf-via-downloadfile-isinjwttoken-bypass
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-14T15:36:13.973Z'
---

## Overview

ONLYOFFICE DocumentServer before 10.0.0 contains an unauthenticated server-side request forgery vulnerability in the /downloadfile/:docid endpoint that allows remote attackers to bypass the private-IP request-filtering-agent by exploiting the isInJwtToken flag when JWT verification is disabled in the default configuration. Attackers can submit a crafted request body containing an internal or loopback URL, which is treated as a DIRECT request skipping private-address filtering, causing the server to fetch and proxy back arbitrary private-network and cloud metadata content.

## Remediation

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