CVE-2026-29790
dbt-common: commonprefix() doesn't protect against path traversal
dbt-common is the shared common utilities for dbt-core and adapter implementations use. Prior to versions 1.34.2 and 1.37.3, a path traversal vulnerability exists in dbt-common's safe_extract() function used when extracting tarball archives. The function uses os.path.commonprefix() to validate that extracted files remain within the intended destination directory. However, commonprefix() compares paths character-by-character rather than by path components, allowing a malicious tarball to write files to sibling directories with matching name prefixes. This issue has been patched in versions 1.34.2 and 1.37.3.
| CWE | CWE-22 |
| Vendor | dbt-labs |
| Product | dbt-common |
| Published | Mar 6, 2026 |
| Last Updated | Mar 9, 2026 |
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