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For AppSec

Stop new CVE exposure without waiting on upgrade PRs

Scanning finds log4j after it's already in six services. Chainsaw refuses it on the seventh — and every install after. Push one policy edit and the affected version stops installing everywhere. No coordinated upgrade PR. No waiting on a scanner re-run.

The pain

  • Vulnerabilities land in production before the scanner catches them.
  • Upgrade PRs pile up after every CVE and there's no way to stop new spread while they're in review.
  • Supply-chain attacks — PhantomRaven install scripts, Shai-Hulud worm bursts, Axios-style account takeover — slip past SCA because they target the install, not the code.
  • Policy lives in spreadsheets and Slack, not on the install path.

What changes

Stop risky packages at download

Vulnerability, license, and version rules run on every install before the package enters a build. Up to 12 supply-chain attack signals run on the same request (per-ecosystem support varies — see POLICY_PROXY_MATRIX.md).

Give devs a useful error

Blocked installs include the rule, the reason, and who owns the exception path. Teams know exactly what to fix.

Zero-disruption rollout

Get to blocking in three moves

  1. Point package managers at Chainsaw

    A one-line registry change per package manager. No changes to build scripts, no agent to install on developer laptops.

  2. Start in monitor mode

    See what would have been blocked against your current rules — across every repo — without breaking a single build.

  3. Flip to enforcement when you're ready

    Per-policy toggle. Block the rules you're confident about, keep others in monitor until the team's aligned.

Ready to cut the exposure window?

Start free, turn on monitor mode this week

See what Chainsaw would have blocked before you turn on enforcement. Zero risk to rollout.

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