---
id: CVE-2026-123207
title: LibreTV before v2.21.2 SSRF Protection Bypass via DNS Rebinding
summary: >-
  LibreTV before v2.21.2 contains a server-side request forgery vulnerability
  that allows authenticated users to bypass checkUpstreamAllowed() by exploiting
  unpinned DNS resolution in fetchWithSafeRedirects(). Attackers controlling
  authori…
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'
cvssSource: cna
cwe:
  - CWE-367
vendor: LibreSpark
product: LibreTV
affected:
  - LibreTV < v2.21.2
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T18:16:41.817Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123207'
references:
  - url: 'https://github.com/LibreSpark/LibreTV/issues/941'
  - url: 'https://github.com/LibreSpark/LibreTV/pull/960'
  - url: >-
      https://github.com/LibreSpark/LibreTV/commit/cb4219368b7f6502387a703ef2a781ba763da2b1
  - url: 'https://github.com/LibreSpark/LibreTV/releases/tag/v2.21.2'
    label: LibreTV v2.21.2 Release Notes
  - url: >-
      https://github.com/LibreSpark/LibreTV/blob/29cbeb3d37b4876f909a0354087a3531af0447f6/src/lib/ssrf.ts#L56-L85
  - url: >-
      https://www.vulncheck.com/advisories/libretv-before-2.21.2-ssrf-protection-bypass-via-dns-rebinding
    label: >-
      VulnCheck Advisory: LibreTV before v2.21.2 SSRF Protection Bypass via DNS
      Rebinding
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.460Z'
---

## Overview

LibreTV before v2.21.2 contains a server-side request forgery vulnerability that allows authenticated users to bypass checkUpstreamAllowed() by exploiting unpinned DNS resolution in fetchWithSafeRedirects(). Attackers controlling authoritative DNS can return public addresses during validation and internal addresses at connection time via /api/source/test, /api/proxy, /api/search or /api/detail to reach loopback services, private hosts or cloud metadata endpoints.

## Affected

- `LibreTV < v2.21.2`

## Remediation

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