{"id":"CVE-2026-43986","aliases":["EUVD-2026-34286","GHSA-m6j6-rc2c-8vpm"],"status":"published","title":"Tautulli vulnerable to unauthenticated SSRF in /image/\u003chash\u003e via attacker-seeded image hash replay","description":"Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/\u003chash\u003e` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/\u003chash\u003e.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00262,"percentile":0.18097,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-918"],"published":"2026-06-04T14:33:36Z","modified":"2026-10-28T02:31:14Z","products":[{"vendor":"tautulli","product":"tautulli"}],"references":[{"url":"https://github.com/Tautulli/Tautulli/security/advisories/GHSA-m6j6-rc2c-8vpm","tags":["x_refsource_CONFIRM","exploit","advisory"]},{"url":"https://github.com/Tautulli/Tautulli/releases/tag/v2.17.1","tags":["x_refsource_MISC","web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43986.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43986","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-43986","title":"Tautulli vulnerable to unauthenticated SSRF in /image/\u003chash\u003e via attacker-seeded image hash replay","description":"Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/\u003chash\u003e` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/\u003chash\u003e.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.","status":"published","published":"2026-06-04T14:33:36.547Z","modified":"2026-06-04T17:29:15.849Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"critical","assessor":"cna"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T13:37:36.275898Z"}],"euvd":[{"id":"EUVD-2026-34286","description":"Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/\u003chash\u003e` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/\u003chash\u003e.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.","status":"published","published":"2026-06-04T14:33:36Z","modified":"2026-06-04T17:29:15Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"critical"}],"updated_at":"2026-11-02T18:20:52.744481Z"}],"nvd":[{"id":"CVE-2026-43986","description":"Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/\u003chash\u003e` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/\u003chash\u003e.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.","status":"published","published":"2026-06-04T16:16:38.29Z","modified":"2026-07-22T20:10:00.127Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"critical","assessor":"secondary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:12:22.022466Z"}],"osv":[{"id":"CVE-2026-43986","title":"Tautulli vulnerable to unauthenticated SSRF in /image/\u003chash\u003e via attacker-seeded image hash replay","description":"Tautulli is a Python based monitoring and tracking tool for Plex Media Server. Versions prior to 2.17.1 expose a public `/image/\u003chash\u003e` route that resolves attacker-controlled entries from `image_hash_lookup` and replays them through the same server-side image fetch logic used by authenticated image proxying. A low-privilege guest user can seed a malicious external image URL into this lookup table and then trigger server-side fetches through a fully unauthenticated endpoint. This turns an authenticated SSRF primitive into a persistent unauthenticated SSRF gadget. Once the malicious hash entry exists, any external user can request `/image/\u003chash\u003e.png` and cause the PMS or Tautulli host to fetch an arbitrary attacker-chosen URL. Version 2.17.1 patches the issue.","status":"published","published":"2026-06-04T14:33:36.547Z","modified":"2026-10-28T02:31:14.054600954Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L","level":"critical"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:45:04.820169Z"}]}}