---
id: CVE-2026-111720
title: fish-island-backend through commit 7c61b78 SSRF via /api/web/parse
summary: >-
  fish-island-backend through commit 7c61b78 contains an unauthenticated
  server-side request forgery vulnerability that allows remote attackers to make
  the server fetch attacker-supplied URLs via the url parameter of GET
  /api/web/parse. At…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-918
vendor: lhccong
product: fish-island-backend
affected:
  - fish-island-backend <= 7c61b7861e99d3970beb34103c244b79e4de7d88
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:40:07.659Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111720'
references:
  - url: 'https://hackmd.io/@hieuPenguinnn/fish-island-web-parse-unauth-ssrf'
  - url: >-
      https://github.com/lhccong/fish-island-backend/blob/7c61b7861e99d3970beb34103c244b79e4de7d88/src/main/java/com/cong/fishisland/service/impl/chat/WebParserServiceImpl.java#L28-L45
  - url: >-
      https://github.com/lhccong/fish-island-backend/blob/7c61b7861e99d3970beb34103c244b79e4de7d88/src/main/java/com/cong/fishisland/controller/chat/WebParserController.java#L13-L25
  - url: >-
      https://github.com/lhccong/fish-island-backend/blob/7c61b7861e99d3970beb34103c244b79e4de7d88/src/main/java/com/cong/fishisland/config/CorsConfig.java#L33
  - url: >-
      https://www.vulncheck.com/advisories/fish-island-backend-through-commit-7c61b78-ssrf-via-api-web-parse
    label: >-
      VulnCheck Advisory: fish-island-backend through commit 7c61b78 SSRF via
      /api/web/parse
tags:
  - cve.org
ingestedAt: '2026-10-16T18:43:08.638Z'
---

## Overview

fish-island-backend through commit 7c61b78 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to make the server fetch attacker-supplied URLs via the url parameter of GET /api/web/parse. Attackers can target internal hosts, loopback services or cloud metadata endpoints through redirect-following OkHttp requests and read back page titles, meta descriptions and favicons.

## Affected

- `fish-island-backend <= 7c61b7861e99d3970beb34103c244b79e4de7d88`

## Remediation

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