Vulnerability · Published Nov 5, 2026 · Assigned by VulnCheck

CVE-2026-123207LibreTV before v2.21.2 SSRF Protection Bypass via DNS Rebinding

Low 3.1

In plain English

A low-severity security flaw in LibreTV from LibreSpark. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)3.1Low

Exploit odds (30 days)0.2%top 84.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

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 products (as reported)

Vendor	Product	Versions
LibreSpark	LibreTV	0 – before v2.21.2

Weakness: CWE-367 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/LibreSpark/LibreTV/issues/941 issue-tracking
https://github.com/LibreSpark/LibreTV/pull/960 patch, issue-tracking
https://github.com/LibreSpark/LibreTV/commit/cb4219368b7f6502387a703ef2a781ba763da2b1 patch
LibreTV v2.21.2 Release Notes release-notes
https://github.com/LibreSpark/LibreTV/blob/29cbeb3d37b4876f909a0354087a3531af0447f6/src/lib/ssrf.ts#L56-L85 technical-description
VulnCheck Advisory: LibreTV before v2.21.2 SSRF Protection Bypass via DNS Rebinding third-party-advisory