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. W…
Summary
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. When 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 …
In-depth triage · Auto channel
No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).
Affected products
- :
Lint boundary warnings (1)
The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).
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REF_URL_NOT_ALLOWLISTEDurl not in allowlist: https://www.erlang.org/doc/system/versions.html#order-of-versions
Sources
- NVD DATABASE
Original Links
- https://cna.erlef.org/cves/CVE-2026-48859.html Mitigation
- https://github.com/erlang/otp/commit/c342092ef4b369bb409d5b71ac8fd83bab74aedf Patch
- https://github.com/erlang/otp/security/advisories/GHSA-3w6p-vwhf-wvp4 Mitigation
- https://osv.dev/vulnerability/EEF-CVE-2026-48859 Mitigation
- https://www.erlang.org/doc/system/versions.html#order-of-versions Product
Timeline
- nvd_ingest NVD