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CVE-2026-53422

Observable Response Discrepancy vulnerability in Erlang OTP ssh (ssh_sftpd module) allows an authenticated SFTP user to enumerate the existence of files and directories outside the configured root directory. The SSH_FXP_REALPATH handler in ssh_sftpd calls relate_file_name/3 with Canonicalize=false, unlike every other SFTP operation handler. This allows .. components in the requested path to bypass the is_within_root/2 check without being resolved. The un-canonicalized path then enters resolve_s
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:67ff8f37834a5cce029940bebe2df0826e22bc9aafc68f92624c6252c7856876
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_sftpd"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_sftpd.erl"],"programRoutines":[{"name":"ssh_sftpd:handle_op/4"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.3","status":"unaffected"},{"at":"28.5.0.3","status":"unaffected"},{"at":"27.3.4.14","status":"unaffected"}],"lessThan":"*","status":"affected","version":"17.0","versionType":"otp"},…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/affected/1

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_sftpd"],"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_sftpd.erl"],"programRoutines":[{"name":"ssh_sftpd:handle_op/4"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"6.0.2","status":"unaffected"},{"at":"5.5.2.2","status":"unaffected"},{"at":"5.2.11.9","status":"unaffected"}],"lessThan":"*","status":"affe…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_sftpd"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_sftpd.erl"],"programRoutines":[{"name":"ssh_sftpd:handle_op/4"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.3","status":"unaffected"},{"at":"28.5.0.3","status":"unaffected"},{"at":"27.3.4.14","status":"unaffected"}],"lessThan":"*","status":"affected","version":"17.0","versionType":"otp"},…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/affected/1
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["ssh_sftpd"],"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_sftpd.erl"],"programRoutines":[{"name":"ssh_sftpd:handle_op/4"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"6.0.2","status":"unaffected"},{"at":"5.5.2.2","status":"unaffected"},{"at":"5.2.11.9","status":"unaffected"}],"lessThan":"*","status":"affe…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-204","description":"CWE-204 Observable Response Discrepancy","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-53422.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/059e5785ef8c1d423820ca633fb7b37f47645172"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/86622cfaacf57a02c7645d1999f946846b504c94"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/c5a8f50ae68888ff243c5c741a06d2b3a4b48b7a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/references/6
{"tags":["vendor-advisory","related"],"url":"https://github.com/erlang/otp/security/advisories/GHSA-h9pw-h5w4-h976"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-53422"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /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:v2:76eab663d9fed625522e7f6c26018240cb158dcde10901d27f469285f3e059d2 · sha256:861e6771a606342c… · /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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