{"id":"CVE-2026-90769","title":"Open Notebook before 1.11.0 fails to validate the URL parameter in POST /api/sources endpoint, allowing authenticated users to perform server-side requests to internal services","summary":"Open Notebook before 1.11.0 fails to validate the URL parameter in POST /api/sources endpoint, allowing authenticated users to perform server-side requests to internal services. Attackers can supply arbitrary URLs to read cloud metadata,…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-918"],"vendor":"lfnovo","product":"open-notebook","affected":["open-notebook < 1.11.0"],"published":"2026-09-13","updated":"2026-09-14","sourceUpdated":"2026-09-14T16:17:38.833","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90769","references":[{"url":"https://github.com/lfnovo/open-notebook","label":"disclosure@vulncheck.com"},{"url":"https://github.com/lfnovo/open-notebook/blob/8889087e317177d7b6e286342ab34e0c9c01d43e/api/routers/sources.py","label":"disclosure@vulncheck.com"},{"url":"https://github.com/lfnovo/open-notebook/commit/9045ea50196927eac7de647bb5b7009349236fb4","label":"disclosure@vulncheck.com"},{"url":"https://github.com/lfnovo/open-notebook/issues/1284","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/open-notebook-before-1.11.0-server-side-request-forgery-via-link-source","label":"disclosure@vulncheck.com"},{"url":"https://github.com/lfnovo/open-notebook/issues/1284","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00257,"epssPercentile":0.17676,"ingestedAt":"2026-09-14T15:23:07.471Z","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-14T15:35:56.128393Z"},"slug":"CVE-2026-90769","body":"## Overview\n\nOpen Notebook before 1.11.0 fails to validate the URL parameter in POST /api/sources endpoint, allowing authenticated users to perform server-side requests to internal services. Attackers can supply arbitrary URLs to read cloud metadata, internal network services, and localhost-bound services through the application server's direct HTTP requests.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":42.4,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":203106,"id":"CVE-2026-90769","ts":1789409574893,"field":"exploit_available","old":"false","new":"true"}]}