PT-2026-46259 · Tautulli · Tautulli

Larlarua · CVE-2026-43986 · Published 2026-06-04 · Updated 2026-06-08

Positive Technologies (AI Summary)

CVSS v3.1

9.9

Critical

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

Name of the Vulnerable Software and Affected Versions Tautulli versions prior to 2.17.1

Description Tautulli contains a Server-Side Request Forgery (SSRF) issue where a public endpoint '/image/' resolves entries from image hash lookup and processes them using the same server-side image fetch logic as authenticated image proxying. A low-privilege guest user can insert a malicious external image URL into the lookup table, allowing any unauthenticated external user to trigger server-side fetches to an arbitrary attacker-chosen URL by requesting '/image/.png'. SSRF is a flaw that allows an attacker to induce the server-side application to make requests to an unintended location.

Recommendations Update to version 2.17.1.

Exploit

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-43986

GHSA-M6J6-RC2C-8VPM

Affected Products

Tautulli

References · 6

• 🔥 https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m6j6-rc2c-8vpm · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43986.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-43986 · Security Note
• https://osv.dev/vulnerability/CVE-2026-43986 · Vendor Advisory
• https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1 · Note
• https://twitter.com/HugoValters/status/2063803951183712744 · Twitter Post