{"id":"EM-20261030-3WGR","url":"https://cyber.eventmonitor.net/incident/EM-20261030-3WGR/","type":"cve","title":"OAuthLib Vulnerability (CVE-2026-118669)","subtitle":"CVE-2026-118669","subject":"CVE-2026-118669","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-10-30T22:58:16.000Z","firstSignal":"2026-10-28T22:17:12.610Z","lastSignal":"2026-10-30T22:58:16.000Z","updated":"2026-11-04T14:43:58.877Z","revision":1,"life":[{"status":"Born","at":"2026-10-30T22:58:16.000Z","why":"second independent source: C26 GitHub Advisory Database"},{"status":"Developing","at":"2026-10-30T22:58:16.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-10-28T22:17:12.610Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-10-30T22:58:16.000Z","what":"Born: second source, C26 GitHub Advisory Database. Page EM-20261030-3WGR created."}],"stages":[{"name":"Disclosed","at":"2026-10-28T22:17:12.610Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-10-28T22:17:12.610Z","detail":"CVSS 8.4 · EPSS 0.3%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-10-28T22:17:12.610Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-118669 (CVSS 8.4)","text":"OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. Prior to 4.0.0, the client_credentials and Resource Owner Password Credentials token grant handlers can authenticate request.client as one confidential client while retaining an attacker-supplied request.client_id for validate_grant_type and validate_scopes. A lower-privilege authenticated client can therefore cause grant and scope authorization to use another client's identity when an application validator relies on the documented client_id argument, potentially issuing tokens with unauthorized grants or scopes.","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118669"},{"at":"2026-10-30T22:58:16.000Z","source":"C26","sourceName":"GitHub Advisory Database","role":"Database","severity":3,"title":"GHSA-7984-qgvg-3j9c / CVE-2026-118669: OAuthLib: Token grants can use attacker-supplied client_id for authorization after authenticating a different client","text":"pip:oauthlib","url":"https://github.com/advisories/GHSA-7984-qgvg-3j9c"}],"crowd":[],"reference":{"nvd":{"published":"2026-10-28T22:17:12.610","score":8.4,"severity":"HIGH","desc":"OAuthLib is an implementation of the OAuth request-signing logic for Python 3.6+. Prior to 4.0.0, the client_credentials and Resource Owner Password Credentials token grant handlers can authenticate request.client as one confidential client while retaining an attacker-supplied request.client_id for ","product":"","seen":1793803438877},"kev":null,"epss":{"epss":0.00312,"pct":0.24259,"at":1793803438877},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}