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CVE-2026-23942

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Erlang OTP (ssh_sftpd module) allows Path Traversal. This vulnerability is associated with program files lib/ssh/src/ssh_sftpd.erl and program routines ssh_sftpd:is_within_root/2. The SFTP server uses string prefix matching via lists:prefix/2 rather than proper path component validation when checking if a path is within the configured root directory. This allows authenticated users to access sibling
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:9512ca466ae253d673fc68bcd30c54502743d81b674ae53ef06e0938841ed34f
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

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","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:is_within_root/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"5.5.1","status":"unaffected"},{"at":"5.2.11.6","status":"unaffected"},{"at":"5.1.4.14","status":"unaffected"}],"lessThan":"*","status":"a…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","modules":["ssh_sftpd"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_sftpd.erl"],"programRoutines":[{"name":"ssh_sftpd:is_within_root/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"28.4.1","status":"unaffected"},{"at":"27.3.4.9","status":"unaffected"},{"at":"26.2.5.18","status":"unaffected"}],"lessThan":"*","status":"affected","version":"17.0","versionType":"otp"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","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:is_within_root/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"5.5.1","status":"unaffected"},{"at":"5.2.11.6","status":"unaffected"},{"at":"5.1.4.14","status":"unaffected"}],"lessThan":"*","status":"a…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unknown","modules":["ssh_sftpd"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/ssh/src/ssh_sftpd.erl"],"programRoutines":[{"name":"ssh_sftpd:is_within_root/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"28.4.1","status":"unaffected"},{"at":"27.3.4.9","status":"unaffected"},{"at":"26.2.5.18","status":"unaffected"}],"lessThan":"*","status":"affected","version":"17.0","versionType":"otp"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-22","description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/problemTypes/0/descriptions/0

Source references

7 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-23942.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/27688a824f753d4c16371dc70e88753fb410590b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/5ed603a1211b83b8be2d1fc06d3f3bf30c3c9759"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/references/6
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/9e0ac85d3485e7898e0da88a14be0ee2310a3b28"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/references/5
{"tags":["vendor-advisory","related"],"url":"https://github.com/erlang/otp/security/advisories/GHSA-4749-w85x-hw9h"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-23942"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /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:v2:72c84992de4dee59466d6027764388956dd676154fd517555cc3212e77e9adce · sha256:f31e612074fc02fc… · /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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