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Fix Capa_Info permission error by overriding XDG_CACHE_HOME #3165

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Fix Capa_Info permission error by overriding XDG_CACHE_HOME #3165

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ecaa590
Fix Capa_Info permission error by setting XDG_CACHE_HOME to MEDIA_ROOT
nishantxscooby Jan 5, 2026
1abda45
Fix CAPA cache handling using XDG_CACHE_HOME runtime fallback
nishantxscooby Jan 6, 2026
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10 changes: 10 additions & 0 deletions api_app/analyzers_manager/file_analyzers/capa_info.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,10 @@

import requests
from django.conf import settings
cache_dir = Path(settings.MEDIA_ROOT) / "capa_cache"
cache_dir.mkdir(parents=True, exist_ok=True)

os.environ["XDG_CACHE_HOME"] = str(cache_dir)

from api_app.analyzers_manager.classes import FileAnalyzer
from api_app.analyzers_manager.exceptions import AnalyzerRunException
Expand Down Expand Up @@ -41,6 +45,7 @@ def _download_signatures(cls) -> None:
shutil.rmtree(SIGNATURE_LOCATION)

os.makedirs(SIGNATURE_LOCATION)

logger.info(f"Created fresh signatures directory at {SIGNATURE_LOCATION}")

signatures_url = "https://api.github.com/repos/mandiant/capa/contents/sigs"
Expand Down Expand Up @@ -97,6 +102,11 @@ def update(cls, anayzer_module: PythonModule) -> bool:
def run(self):
try:

cache_dir = Path(settings.MEDIA_ROOT) / "capa_cache"
cache_dir.mkdir(parents=True, exist_ok=True)
os.environ["XDG_CACHE_HOME"] = str(cache_dir)


response = requests.get(
"https://api.github.com/repos/mandiant/capa-rules/releases/latest"
)
Expand Down
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