{"id":"CVE-2026-86075","title":"n8n is an open source workflow automation platform","summary":"n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated re…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"n8n","product":"n8n","affected":["n8n < 2.37.7","n8n >= 2.38.0, < 2.38.2"],"patched":["n8n 2.38.2"],"published":"2026-09-08","updated":"2026-09-11","sourceUpdated":"2026-09-11T18:20:42.783","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86075","references":[{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7","label":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2","label":"security-advisories@github.com"},{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-hh89-3r9w-qj3j","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86075"},{"url":"https://github.com/advisories/GHSA-hh89-3r9w-qj3j"}],"tags":["nvd","cve.org","ghsa","npm"],"epss":0.00339,"epssPercentile":0.27349,"aliases":["GHSA-hh89-3r9w-qj3j"],"ecosystem":"npm","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-09T15:51:52.294118Z"},"scores":{"nvd":7.5,"cna":8.7},"ingestedAt":"2026-09-08T22:12:31.038Z","slug":"CVE-2026-86075","body":"## Overview\n\nn8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated remote caller could repeatedly persist oversized values in oauth_clients and exhaust database storage. The affected validation is in packages/cli/src/modules/oauth-server/oauth-server.service.ts, including MAX_CLIENT_NAME_LENGTH and MAX_GRANT_TYPES. This issue is fixed in versions 2.37.7 and 2.38.2.\n\n## Affected\n\n- `n8n < 2.37.7`\n- `n8n >= 2.38.0, < 2.38.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `n8n 2.38.2`\n\n## Package advisory (CVE-2026-86075)\n\nAffected packages:\n\n- `n8n >= 2.38.0, < 2.38.2`\n- `n8n < 2.37.7`\n\nPatched in:\n\n- `n8n 2.38.2`\n- `n8n 2.37.7`\n\nSource: https://github.com/advisories/GHSA-hh89-3r9w-qj3j","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":202065,"id":"CVE-2026-86075","ts":1789400047463,"field":"cvss","old":"8.7","new":"7.5"},{"seq":200792,"id":"CVE-2026-86075","ts":1789397615752,"field":"cvss","old":"7.5","new":"8.7"},{"seq":199485,"id":"CVE-2026-86075","ts":1789395520336,"field":"cvss","old":"8.7","new":"7.5"},{"seq":198730,"id":"CVE-2026-86075","ts":1789392243353,"field":"cvss","old":"7.5","new":"8.7"},{"seq":197063,"id":"CVE-2026-86075","ts":1789384291765,"field":"cvss","old":"8.7","new":"7.5"},{"seq":194192,"id":"CVE-2026-86075","ts":1789378782418,"field":"cvss","old":"7.5","new":"8.7"},{"seq":192979,"id":"CVE-2026-86075","ts":1789376514403,"field":"cvss","old":"8.7","new":"7.5"},{"seq":191766,"id":"CVE-2026-86075","ts":1789373630432,"field":"cvss","old":"7.5","new":"8.7"},{"seq":190551,"id":"CVE-2026-86075","ts":1789369474651,"field":"cvss","old":"8.7","new":"7.5"},{"seq":189338,"id":"CVE-2026-86075","ts":1789368408340,"field":"cvss","old":"7.5","new":"8.7"},{"seq":188121,"id":"CVE-2026-86075","ts":1789365230062,"field":"cvss","old":"8.7","new":"7.5"},{"seq":186908,"id":"CVE-2026-86075","ts":1789363470624,"field":"cvss","old":"7.5","new":"8.7"},{"seq":185694,"id":"CVE-2026-86075","ts":1789361228399,"field":"cvss","old":"8.7","new":"7.5"},{"seq":184481,"id":"CVE-2026-86075","ts":1789358363008,"field":"cvss","old":"7.5","new":"8.7"},{"seq":182732,"id":"CVE-2026-86075","ts":1789354316428,"field":"cvss","old":"8.7","new":"7.5"},{"seq":181525,"id":"CVE-2026-86075","ts":1789353317032,"field":"cvss","old":"7.5","new":"8.7"},{"seq":180318,"id":"CVE-2026-86075","ts":1789350284054,"field":"cvss","old":"8.7","new":"7.5"},{"seq":179111,"id":"CVE-2026-86075","ts":1789348292199,"field":"cvss","old":"7.5","new":"8.7"},{"seq":177904,"id":"CVE-2026-86075","ts":1789346369351,"field":"cvss","old":"8.7","new":"7.5"},{"seq":176697,"id":"CVE-2026-86075","ts":1789343183854,"field":"cvss","old":"7.5","new":"8.7"},{"seq":174814,"id":"CVE-2026-86075","ts":1789334874983,"field":"cvss","old":"8.7","new":"7.5"},{"seq":173609,"id":"CVE-2026-86075","ts":1789333686158,"field":"cvss","old":"7.5","new":"8.7"},{"seq":172423,"id":"CVE-2026-86075","ts":1789331092338,"field":"cvss","old":"8.7","new":"7.5"},{"seq":171237,"id":"CVE-2026-86075","ts":1789328780221,"field":"cvss","old":"7.5","new":"8.7"},{"seq":170032,"id":"CVE-2026-86075","ts":1789327196487,"field":"cvss","old":"8.7","new":"7.5"},{"seq":168827,"id":"CVE-2026-86075","ts":1789323839384,"field":"cvss","old":"7.5","new":"8.7"},{"seq":167622,"id":"CVE-2026-86075","ts":1789319701766,"field":"cvss","old":"8.7","new":"7.5"},{"seq":166417,"id":"CVE-2026-86075","ts":1789318775462,"field":"cvss","old":"7.5","new":"8.7"},{"seq":165212,"id":"CVE-2026-86075","ts":1789315789281,"field":"cvss","old":"8.7","new":"7.5"},{"seq":164007,"id":"CVE-2026-86075","ts":1789313633616,"field":"cvss","old":"7.5","new":"8.7"},{"seq":162802,"id":"CVE-2026-86075","ts":1789311902738,"field":"cvss","old":"8.7","new":"7.5"},{"seq":161597,"id":"CVE-2026-86075","ts":1789308732559,"field":"cvss","old":"7.5","new":"8.7"},{"seq":159710,"id":"CVE-2026-86075","ts":1789300469931,"field":"cvss","old":"8.7","new":"7.5"},{"seq":156699,"id":"CVE-2026-86075","ts":1789294754978,"field":"cvss","old":"7.5","new":"8.7"},{"seq":155494,"id":"CVE-2026-86075","ts":1789292967260,"field":"cvss","old":"8.7","new":"7.5"},{"seq":154289,"id":"CVE-2026-86075","ts":1789289796899,"field":"cvss","old":"7.5","new":"8.7"},{"seq":151540,"id":"CVE-2026-86075","ts":1789277629194,"field":"cvss","old":"8.7","new":"7.5"},{"seq":150501,"id":"CVE-2026-86075","ts":1789276244999,"field":"cvss","old":"7.5","new":"8.7"},{"seq":149468,"id":"CVE-2026-86075","ts":1789273824048,"field":"cvss","old":"8.7","new":"7.5"},{"seq":148435,"id":"CVE-2026-86075","ts":1789271348086,"field":"cvss","old":"7.5","new":"8.7"},{"seq":146466,"id":"CVE-2026-86075","ts":1789269393934,"field":"cvss","old":"8.7","new":"7.5"},{"seq":145271,"id":"CVE-2026-86075","ts":1789266338923,"field":"cvss","old":"7.5","new":"8.7"},{"seq":144175,"id":"CVE-2026-86075","ts":1789262616091,"field":"cvss","old":"8.7","new":"7.5"},{"seq":143079,"id":"CVE-2026-86075","ts":1789261532778,"field":"cvss","old":"7.5","new":"8.7"},{"seq":141910,"id":"CVE-2026-86075","ts":1789258831110,"field":"cvss","old":"8.7","new":"7.5"},{"seq":140751,"id":"CVE-2026-86075","ts":1789256726503,"field":"cvss","old":"7.5","new":"8.7"},{"seq":139553,"id":"CVE-2026-86075","ts":1789254831389,"field":"cvss","old":"8.7","new":"7.5"},{"seq":138355,"id":"CVE-2026-86075","ts":1789251933584,"field":"cvss","old":"7.5","new":"8.7"},{"seq":137157,"id":"CVE-2026-86075","ts":1789247832073,"field":"cvss","old":"8.7","new":"7.5"},{"seq":135959,"id":"CVE-2026-86075","ts":1789247055338,"field":"cvss","old":"7.5","new":"8.7"}]}