{"id":"CVE-2026-78426","aliases":["EUVD-2026-81414","GHSA-wcx5-mq6c-c54j"],"status":"published","title":"Logout bypass via alternate JWT spelling","description":"The NeuVector JWT verifier accepts noncanonical Base64URL encodings of the same RSA signature field. An attacker holding a valid JWT that has not expired, but was logged out of NeuVector, can continue using the non-expired token with equivalent spelling of the RSA signature field until the token validity expires.","severity":{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00187,"percentile":0.08384,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2026-09-17T09:28:19Z","modified":"2026-10-28T02:30:38Z","products":[{"vendor":"suse","product":"neuvector"}],"references":[{"url":"https://github.com/neuvector/neuvector/security/advisories/GHSA-wcx5-mq6c-c54j","tags":["vendor-advisory","advisory"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-78426","tags":["issue-tracking","report"]},{"url":"https://github.com/neuvector/neuvector/security/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78426.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78426","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-78426","title":"Logout bypass via alternate JWT spelling","description":"The NeuVector JWT verifier accepts noncanonical Base64URL encodings of the same RSA signature field. An attacker holding a valid JWT that has not expired, but was logged out of NeuVector, can continue using the non-expired token with equivalent spelling of the RSA signature field until the token validity expires.","status":"published","published":"2026-09-17T09:28:19.683Z","modified":"2026-09-28T12:03:54.563Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T13:34:59.78118Z"}],"euvd":[{"id":"EUVD-2026-81414","description":"The NeuVector JWT verifier accepts noncanonical Base64URL encodings of the same RSA signature field. An attacker holding a valid JWT that has not expired, but was logged out of NeuVector, can continue using the non-expired token with equivalent spelling of the RSA signature field until the token validity expires.","status":"published","published":"2026-09-17T09:28:19Z","modified":"2026-09-28T12:03:54Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low"}],"updated_at":"2026-11-02T17:27:53.908541Z"}],"nvd":[{"id":"CVE-2026-78426","description":"The NeuVector JWT verifier accepts noncanonical Base64URL encodings of the same RSA signature field. An attacker holding a valid JWT that has not expired, but was logged out of NeuVector, can continue using the non-expired token with equivalent spelling of the RSA signature field until the token validity expires.","status":"published","published":"2026-09-17T10:17:03.52Z","modified":"2026-09-28T13:17:22.48Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"low","assessor":"secondary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:12:49.013904Z"}],"osv":[{"id":"CVE-2026-78426","title":"Logout bypass via alternate JWT spelling","description":"The NeuVector JWT verifier accepts noncanonical Base64URL encodings of the same RSA signature field. An attacker holding a valid JWT that has not expired, but was logged out of NeuVector, can continue using the non-expired token with equivalent spelling of the RSA signature field until the token validity expires.","status":"published","published":"2026-09-17T09:28:19.683Z","modified":"2026-10-28T02:30:38.732682151Z","cvss":[{"version":"4.0","score":2,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","level":"low"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T15:45:17.44708Z"}]}}