{"schema":"threatline.record/2","record":{"id":"CVE-2026-55423","aliases":["GHSA-7hw8-6q6r-4276","PYSEC-2026-222"],"summary":"Langflow: Logout button does not clear session","details":"### Summary\nThe logout button does not clear the session. The previous user stays logged in unless another user explicitly logs in.\n\n### Details\nNot in auto login mode. Hosted on localhost. `access_token_lf` remains present in both Local Storage and Cookies. `refresh_token_lf` remains present in Cookies.\n\n**Root cause:** the `/logout` endpoint deleted the authentication cookies without matching the original `httponly`/`samesite`/`secure`/`domain` parameters, so the browser kept them; additionally the frontend did not clear the auth cookies on logout.\n\n```\nLANGFLOW_AUTO_LOGIN: \"False\"\nLANGFLOW_SUPERUSER: <set>\nLANGFLOW_SUPERUSER_PASSWORD: <set>\nLANGFLOW_SECRET_KEY: <set>\nLANGFLOW_NEW_USER_IS_ACTIVE: \"False\"\nLANGFLOW_ENABLE_SUPERUSER_CLI: \"False\"\n```\n\n### PoC\nClick Logout. Hit refresh to return to previous screen.\n\n### Impact\nUsers on shared computers may falsely believe they have terminated their session.\n\n### Patches\nFixed in **1.7.0** (PRs #10527 and #10528). The logout endpoint now deletes the auth cookies using the same parameters they were created with, and the frontend clears the auth cookies on logout. Upgrade to **1.7.0 or later**.","categories":["Applications & CMS"],"product":"langflow","vendor":"langflow-ai","ecosystem":"pip","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-7hw8-6q6r-4276","source_modified_at":"2026-09-24T14:57:12Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"langflow"},"range":"< 1.7.0"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-55423","source_modified_at":"2026-06-23T17:07:10.031Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"langflow","vendor":"langflow-ai","versions":[{"status":"affected","version":"< 1.7.0"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-7hw8-6q6r-4276","source_modified_at":"2026-09-24T15:00:04.766539580Z","fetched_at":"2026-10-23T18:55:00.935475Z","package":{"name":"langflow","ecosystem":"PyPI","purl":"pkg:pypi/langflow"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.0"}]}],"versions":["0.0.31","0.0.32","0.0.33","0.0.40","0.0.44","0.0.45","0.0.46","0.0.52","0.0.53","0.0.54","0.0.55","0.0.56","0.0.57","0.0.58","0.0.61","0.0.62","0.0.63","0.0.64","0.0.65","0.0.66","0.0.67","0.0.68","0.0.69","0.0.70","0.0.71","0.0.72","0.0.73","0.0.74","0.0.75","0.0.76","0.0.78","0.0.79","0.0.80","0.0.81","0.0.83","0.0.84","0.0.85","0.0.86","0.0.87","0.0.88","0.0.89","0.1.0","0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.1.7","0.2.0","0.2.1"]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-7hw8-6q6r-4276","source_modified_at":"2026-09-24T14:57:12Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"pip","name":"langflow"},"version":"1.7.0"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-7hw8-6q6r-4276","source_modified_at":"2026-09-24T15:00:04.766539580Z","fetched_at":"2026-10-23T18:55:00.935475Z","package":{"name":"langflow","ecosystem":"PyPI","purl":"pkg:pypi/langflow"},"version":"1.7.0"}],"cvss":6.1,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00222,"percentile":0.12046,"score_date":"2026-10-23"},"published_at":"2026-06-23T16:27:19.134Z","modified_at":"2026-09-24T15:00:04.766539580Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-7hw8-6q6r-4276","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-09-24T14:57:12Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-55423","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-06-23T17:07:10.031Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-7hw8-6q6r-4276","fetched_at":"2026-10-23T18:55:00.935475Z","source_modified_at":"2026-09-24T15:00:04.766539580Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-55423","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/langflow-ai/langflow/security/advisories/GHSA-7hw8-6q6r-4276","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/langflow-ai/langflow/pull/10527","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/langflow-ai/langflow/pull/10528","tags":["x_refsource_MISC"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55423","source":"GitHub Advisory Database"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/langflow/PYSEC-2026-222.yaml","source":"GitHub Advisory Database"},{"url":"https://github.com/advisories/GHSA-7hw8-6q6r-4276","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"total","assessed_at":"2026-06-23T17:06:31.440801Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-09-24T15:00:04.766539580Z","content_hash":"edbd9ea4b6434e6ab7c88005206da9256da25680cdf5da04ccba43d27446e47d"}}