---
id: CVE-2026-110223
title: >-
  Kavita 0.9.0 through 0.9.1.4 contains a server-side request forgery
  vulnerability that allows authenticated users to bypass the SSRF blocklist
  through DNS rebinding or HTTPS redirects
summary: >-
  Kavita 0.9.0 through 0.9.1.4 contains a server-side request forgery
  vulnerability that allows authenticated users to bypass the SSRF blocklist
  through DNS rebinding or HTTPS redirects. Attackers can submit a URL to POST
  /api/Cbl/upload-c…
severity: low
cvss: 3.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-918
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T19:30:29.797'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110223'
references:
  - url: 'https://github.com/Kareadita/Kavita'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Kareadita/Kavita/blob/879b8b73eb41d66f88dde8eb874cc99a3397eb11/Kavita.Common/Helpers/FlurlConfiguration.cs#L46-L89
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/Kareadita/Kavita/blob/879b8b73eb41d66f88dde8eb874cc99a3397eb11/Kavita.Server/Controllers/CBLController.cs#L82-L108
    label: disclosure@vulncheck.com
  - url: 'https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/kavita-cbl-url-preflight-ssrf'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/kavita-0.9.0-through-0.9.1.4-ssrf-blocklist-bypass-via-upload-cbl-file-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-13T19:43:28.939Z'
---

## Overview

Kavita 0.9.0 through 0.9.1.4 contains a server-side request forgery vulnerability that allows authenticated users to bypass the SSRF blocklist through DNS rebinding or HTTPS redirects. Attackers can submit a URL to POST /api/Cbl/upload-cbl-file whose host rebinds or redirects to internal addresses after validation, enabling blind internal port and service probing.

## Remediation

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