{"cve":{"cve_id":"CVE-2026-48859","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00622,"epss_percentile":0.4869,"epss_as_of":"2026-10-15","description":"Observable Timing Discrepancy vulnerability in Erlang/OTP ssh (ssh_auth, ssh_options modules) allows unauthenticated remote username enumeration via timing side-channel in password authentication.\n\nWhen the SSH daemon is configured with the user_passwords or password option, ssh_auth:check_password/3 performs a PBKDF2-SHA256 computation with 600,000 iterations (~300ms) for valid usernames, but returns immediately (~0ms) for invalid usernames via the ssh_options:get_password_option/2 path. This timing difference is detectable in a single authentication attempt and allows an unauthenticated attacker to distinguish valid from invalid usernames.\n\nThe user_passwords and password options are documented as intended for test purposes; the recommended alternative is pwdfun, which is not affected by this vulnerability.\n\nThis vulnerability is associated with program files lib/ssh/src/ssh_auth.erl and lib/ssh/src/ssh_options.erl.\n\nThis issue affects OTP from OTP 29.0 before OTP 29.0.2, corresponding to ssh from 6.0 before 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Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"L","value_label":"Low"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"N","value_label":"None"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"erlang","vendor_name":"erlang","product_slug":"erlang-otp","product_name":"erlang/otp","version_start":null,"version_start_inclusive":null,"version_end":null,"version_end_inclusive":null,"cpe23_uri":"cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"},{"vendor_slug":"erlang","vendor_name":"erlang","product_slug":"erlang-ssh","product_name":"erlang/ssh","version_start":"6.0","version_start_inclusive":true,"version_end":"6.0.1","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:erlang:erlang\\/ssh:*:*:*:*:*:*:*:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/erlang/otp/security/advisories/GHSA-3w6p-vwhf-wvp4","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://cna.erlef.org/cves/CVE-2026-48859.html","source_type":"MISC","tags":[]},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-48859","source_type":"MISC","tags":[]},{"url":"https://www.erlang.org/doc/system/versions.html#order-of-versions","source_type":"MISC","tags":[]},{"url":"https://github.com/erlang/otp/commit/c342092ef4b369bb409d5b71ac8fd83bab74aedf","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-06-10T14:35:43.553000Z","label":"CVE 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