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CM-65436: add SAST fallback ignore-extensions list by mateusz-sterczewski · Pull Request #473 · cycodehq/cycode-cli · GitHub

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CM-65436: add SAST fallback ignore-extensions list #473

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Merged
mateusz-sterczewski merged 1 commit into from
Jun 16, 2026
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CM-65436: add SAST fallback ignore-extensions list #473

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24 changes: 24 additions & 0 deletions cycode/cli/consts.py
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,30 @@
'.iso',
)

# Fallback block-list used for SAST only when the server does not return scannable extensions
# (e.g. when the customer has custom rules, any text file is scannable). These are non-source
# data formats that can slip past binary detection (the EICAR test file and ClamAV signature
# databases are plain ASCII) and may be quarantined by object-storage antivirus after upload.
SAST_SCAN_FILE_EXTENSIONS_TO_IGNORE = (
'.bin',
'.cvd',
'.cld',
'.cud',
'.hdb',
'.hsb',
'.mdb',
'.msb',
'.ndb',
'.ndu',
'.ldb',
'.ldu',
'.idb',
'.fp',
'.sfp',
'.ign',
'.ign2',
)

SCA_CONFIGURATION_SCAN_SUPPORTED_FILES = ( # keep in lowercase
'cargo.lock',
'cargo.toml',
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8 changes: 8 additions & 0 deletions cycode/cli/files_collector/file_excluder.py
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Original file line number Diff line number Diff line change
Expand Up @@ -63,7 +63,10 @@ def __init__(self) -> None:
}
self._non_scannable_extensions: dict[str, tuple[str, ...]] = {
consts.SECRET_SCAN_TYPE: consts.SECRET_SCAN_FILE_EXTENSIONS_TO_IGNORE,
consts.SAST_SCAN_TYPE: consts.SAST_SCAN_FILE_EXTENSIONS_TO_IGNORE,
}
# Tracks scan types for which the SAST fallback log has already been emitted (log once, not per file)
self._logged_sast_fallback = False

def apply_scan_config(self, scan_type: str, scan_config: 'models.ScanConfiguration') -> None:
if scan_config.scannable_extensions:
Expand All @@ -86,6 +89,11 @@ def _is_file_extension_supported(self, scan_type: str, filename: str) -> bool:

non_scannable_extensions = self._non_scannable_extensions.get(scan_type)
if non_scannable_extensions:
# For SAST, reaching the block-list means the server returned no scannable extensions
# (e.g. custom rules, or no remote config). Log once so this is diagnosable.
if scan_type == consts.SAST_SCAN_TYPE and not self._logged_sast_fallback:
self._logged_sast_fallback = True
logger.debug('No scannable extensions provided for SAST; falling back to the built-in ignore list')
return not filename.endswith(non_scannable_extensions)

return True
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