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CVE-2026-48859

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 t
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0b99664d8bc8daecff13de8097c2579fee1068439e579707d36e778465e2a5b4
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 3 assertions

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_auth","ssh_options"],"packageName":"ssh","packageURL":"pkg:otp/ssh?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/ssh_auth.erl","src/ssh_options.erl"],"programRoutines":[{"name":"ssh_auth:check_password/3"},{"name":"ssh_options:get_password_option/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"lessThan":"6.0.1","status":"affected","version":"6.0","versionType":"otp"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/affected/1

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_auth","ssh_options"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_auth.erl","lib/ssh/src/ssh_options.erl"],"programRoutines":[{"name":"ssh_auth:check_password/3"},{"name":"ssh_options:get_password_option/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"lessThan":"c342092ef4b369bb409d5b71ac8fd83bab74aedf","status":"affected","version":"032d1bc9491a3975c68faf9bc777…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/affected/2

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_auth","ssh_options"],"packageName":"otp","packageURL":"pkg:sid/erlang.org/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_auth.erl","lib/ssh/src/ssh_options.erl"],"programRoutines":[{"name":"ssh_auth:check_password/3"},{"name":"ssh_options:get_password_option/2"}],"vendor":"Erlang","versions":[{"lessThan":"29.0.2","status":"affected","version":"29.0","versionType":"otp"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/affected/0

Affected products and versions

3 source assertions
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_auth","ssh_options"],"packageName":"ssh","packageURL":"pkg:otp/ssh?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/ssh_auth.erl","src/ssh_options.erl"],"programRoutines":[{"name":"ssh_auth:check_password/3"},{"name":"ssh_options:get_password_option/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"lessThan":"6.0.1","status":"affected","version":"6.0","versionType":"otp"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/affected/1
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_auth","ssh_options"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_auth.erl","lib/ssh/src/ssh_options.erl"],"programRoutines":[{"name":"ssh_auth:check_password/3"},{"name":"ssh_options:get_password_option/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"lessThan":"c342092ef4b369bb409d5b71ac8fd83bab74aedf","status":"affected","version":"032d1bc9491a3975c68faf9bc777…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/affected/2
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_auth","ssh_options"],"packageName":"otp","packageURL":"pkg:sid/erlang.org/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_auth.erl","lib/ssh/src/ssh_options.erl"],"programRoutines":[{"name":"ssh_auth:check_password/3"},{"name":"ssh_options:get_password_option/2"}],"vendor":"Erlang","versions":[{"lessThan":"29.0.2","status":"affected","version":"29.0","versionType":"otp"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-208","description":"CWE-208 Observable Timing Discrepancy","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-48859.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/c342092ef4b369bb409d5b71ac8fd83bab74aedf"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/references/4
{"tags":["vendor-advisory","related"],"url":"https://github.com/erlang/otp/security/advisories/GHSA-3w6p-vwhf-wvp4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-48859"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/references/2
{"tags":["x_version-scheme"],"url":"https://www.erlang.org/doc/system/versions.html#order-of-versions"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:aa1795e840cfa29535d7453edc28b3853fa2db675db393ca77e3312e7a4cd37f · sha256:827fa2e5e05091a1… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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