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CVE-2026-13723

A vulnerability in the `zipx.Unzip` extraction routine of Develar's app-builder allows an attacker to overwrite arbitrary files on macOS APFS by exploiting a Unicode Normalization Collision combined with symlink following behavior. APFS treats certain Unicode equivalent filenames as identical (e.g., ß ↔ ss), while app builder performs no canonical normalization before validating or writing paths. As a result, a crafted ZIP archive containing: • a symlink entry named ss pointing to a target file
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:efe27d9e3a2a8261ef5a44af808e3d81c8da735ef166b4c93b813348be87d3f9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 4 assertions

{"cweId":"CWE-59","description":"CWE-59 Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/adp/1/problemTypes/1/descriptions/0

{"description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/problemTypes/0/descriptions/0

{"description":"CWE-59 Improper Link Resolution Before File Access ('Link Following')","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/problemTypes/1/descriptions/0

{"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:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"app-builder","vendor":"Develar","versions":[{"lessThanOrEqual":"4.2.0","status":"affected","version":"0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

4 source assertions
{"cweId":"CWE-59","description":"CWE-59 Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/adp/1/problemTypes/1/descriptions/0
{"description":"CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/problemTypes/0/descriptions/0
{"description":"CWE-59 Improper Link Resolution Before File Access ('Link Following')","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/problemTypes/1/descriptions/0
{"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:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"http://kb.cert.org/vuls/id/293714"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/references/1
{"url":"https://github.com/develar/app-builder"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/references/0
{"url":"https://github.com/develar/app-builder/pull/163"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/cna/references/2
{"url":"https://www.kb.cert.org/vuls/id/293714"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e22574b80b79f999ccc10b3f7b0eb6adeed1205fff211f6b9c6f8cfc0cd0b4a4 · sha256:d1c6d4ea21ad53cd… · /containers/adp/0/references/0

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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