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CVE-2026-47078

Relative Path Traversal vulnerability in Erlang OTP (stdlib zip module) allows writing files outside the intended extraction directory via a crafted zip archive. zip:unzip/1,2 and zip:extract/1,2 validate entry paths using zip:check_dir_level/2, which tracks directory depth as a running integer counter: .. decrements it, normal path components increment it. The caller rejects only paths where the final counter value is less than zero. A path such as ../x/y causes the counter to go negative mid-
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1bd263be3f3cb25ad446c17dc46880a6c0cfe556023489602cef9d577cb94774
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":["zip"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/stdlib/src/zip.erl"],"programRoutines":[{"name":"zip:unzip/1"},{"name":"zip:unzip/2"},{"name":"zip:extract/1"},{"name":"zip:extract/2"},{"name":"zip:check_dir_level/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.4","status":"unaffected"},{"at":"28.5.0.4","status":"unaffected"},{"at":"27.3.4.15","status":"…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/affected/1

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["zip"],"packageName":"stdlib","packageURL":"pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/zip.erl"],"programRoutines":[{"name":"zip:unzip/1"},{"name":"zip:unzip/2"},{"name":"zip:extract/1"},{"name":"zip:extract/2"},{"name":"zip:check_dir_level/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"8.0.3","status":"unaffected"},{"at":"7.3.0.1","st…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /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":["zip"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["lib/stdlib/src/zip.erl"],"programRoutines":[{"name":"zip:unzip/1"},{"name":"zip:unzip/2"},{"name":"zip:extract/1"},{"name":"zip:extract/2"},{"name":"zip:check_dir_level/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.4","status":"unaffected"},{"at":"28.5.0.4","status":"unaffected"},{"at":"27.3.4.15","status":"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/affected/1
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["zip"],"packageName":"stdlib","packageURL":"pkg:otp/stdlib?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["src/zip.erl"],"programRoutines":[{"name":"zip:unzip/1"},{"name":"zip:unzip/2"},{"name":"zip:extract/1"},{"name":"zip:extract/2"},{"name":"zip:check_dir_level/2"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"8.0.3","status":"unaffected"},{"at":"7.3.0.1","st…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":4.8,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-23","description":"CWE-23 Relative Path Traversal","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-47078.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/8a933c9c7835b06776d31d17b79b7336627d887a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/references/4
{"tags":["vendor-advisory","related"],"url":"https://github.com/erlang/otp/security/advisories/GHSA-rf72-wp7h-jg3x"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-47078"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /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:c8d5f9eaacc87605af0865e3d7f355046e11a9b5616ebd1994e83b6e93db92ff · sha256:f71663d38ada2921… · /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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