{"id":"CVE-2026-74872","aliases":["GHSA-j48q-4c78-rhf9"],"title":"openssl-encrypt: Dynamic .so loading for Whirlpool uses broad glob pattern without integrity verification","summary":"openssl-encrypt: Dynamic .so loading for Whirlpool uses broad glob pattern without integrity verification","severity":"medium","vendor":"openssl-encrypt","product":"openssl-encrypt","ecosystem":"pip","affected":["openssl-encrypt < 1.4.0"],"patched":["openssl-encrypt 1.4.0"],"published":"2026-03-31","updated":"2026-08-18","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-j48q-4c78-rhf9","references":[{"url":"https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-j48q-4c78-rhf9"},{"url":"https://github.com/jahlives/openssl_encrypt/commit/963d0d1278b722ea134272f9df65fddcd3e6ab47"},{"url":"https://github.com/jahlives/openssl_encrypt"}],"tags":["osv","pip"],"ingestedAt":"2026-08-18T12:28:09.078Z","epss":0.0046,"epssPercentile":0.39157,"slug":"CVE-2026-74872","body":"## Overview\n\n## Severity: HIGH\n\n### Summary\n\nThe Whirlpool hash implementation in `openssl_encrypt/modules/registry/hash_registry.py` at **lines 570-589** uses glob patterns to find `.so` modules in site-packages and loads the first match via `importlib` without verifying module integrity.\n\n### Affected Code\n\n```python\nfor site_pkg in site.getsitepackages():\n    pattern = os.path.join(site_pkg, \"whirlpool*py313*.so\")\n    py313_modules = glob.glob(pattern)\n    if py313_modules:\n        module_path = py313_modules[0]  # Takes first match\n        loader = ExtensionFileLoader(\"whirlpool\", module_path)\n        spec = importlib.util.spec_from_file_location(\"whirlpool\", module_path, loader=loader)\n        whirlpool_module = importlib.util.module_from_spec(spec)\n        spec.loader.exec_module(whirlpool_module)\n```\n\n### Impact\n\nThe glob pattern `\"whirlpool*py313*.so\"` is broad and takes the first match without verifying:\n- File hash/signature\n- File ownership/permissions\n- Whether it's a legitimate module\n\nIf an attacker can place a malicious `.so` file matching this pattern in any site-packages directory, it will be loaded and native code executed.\n\n### Recommended Fix\n\n- Verify the module's integrity (hash or signature) before loading\n- Use a specific filename rather than a glob pattern\n- Check file permissions and ownership\n\n### Fix\n\nFixed in commit `963d0d1` on branch `releases/1.4.x` — added os.path.realpath() to resolve symlinks and validation that found .so files are within known site-packages directories before loading.\n\n## Affected packages\n\n- `openssl-encrypt < 1.4.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `openssl-encrypt 1.4.0`","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}