---
id: CVE-2026-107460
title: >-
  Server-Side Request Forgery (SSRF) protection in the UrlImageConverter
  component of Apache Fesod (Incubating) fesod-sheet 2.0.2-incubating can be
  bypassed through DNS rebinding
summary: >-
  Server-Side Request Forgery (SSRF) protection in the UrlImageConverter
  component of Apache Fesod (Incubating) fesod-sheet 2.0.2-incubating can be
  bypassed through DNS rebinding. When an application accepts an
  attacker-controlled image UR…
severity: none
cwe:
  - CWE-918
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T15:17:31.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107460'
references:
  - url: 'https://cve.org/CVERecord?id=CVE-2026-49328'
    label: security@apache.org
  - url: 'https://github.com/apache/fesod/pull/1035'
    label: security@apache.org
  - url: 'https://github.com/apache/fesod/releases/tag/2.1.0-incubating'
    label: security@apache.org
  - url: 'https://lists.apache.org/thread/oh706yhm32hmw8vx4kh1948h952pfr83'
    label: security@apache.org
tags:
  - nvd
ingestedAt: '2026-10-13T15:33:40.068Z'
---

## Overview

Server-Side Request Forgery (SSRF) protection in the UrlImageConverter component of Apache Fesod (Incubating) fesod-sheet 2.0.2-incubating can be bypassed through DNS rebinding. When an application accepts an attacker-controlled image URL for spreadsheet writing, the converter checks the hostname's resolved IP addresses and then opens a separate connection that can resolve the hostname again. An attacker who controls DNS responses for the URL hostname may cause the connection to reach a restricted address after validation. CVE-2026-49328 covers SSRF in releases before 2.0.2-incubating; this issue is a DNS rebinding bypass of the protection in 2.0.2-incubating. Apache Fesod (Incubating) 2.1.0-incubating addresses the reported default-fetch scenario by disabling remote URL image fetching by default and requiring an explicit exact-host allowlist when the feature is enabled. Users should upgrade to 2.1.0-incubating. Applications enabling remote URL image fetching should allowlist only hostnames whose DNS and HTTP services are trusted.

## Remediation

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