# Chainsaw for AppSec

> For AppSec teams: block vulnerable, deprecated, or non-compliant packages at install time. Cut exposure windows with a policy-driven firewall.

Source: https://chain305.com/solutions/appsec/

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For AppSec

# Stop new CVE exposure without waiting on upgrade PRs

Push one policy edit and the affected version stops installing in every repo, CI job and laptop. A scanner finds log4j after it's in six services; Chainsaw refuses it on the seventh.

![Chainsaw Findings screen with severity summary cards and a triage list of blocked findings ranked by priority.](/demo/digest.png?v=3)

Findings Refused packages, ranked for triage. Demo org seeded with synthetic install traffic.

The pain

-   Vulnerabilities reach production before the scanner catches them.
-   Upgrade PRs pile up after every CVE, and nothing halts new spread meanwhile.
-   PhantomRaven, Shai-Hulud and Axios-style attacks target the install, so SCA misses them.

What changes

### Refuse bad packages on the install path

[Vulnerability, license and version rules](https://chain305.com/pricing/) plus 25 supply-chain signals beyond CVE run before a package enters a build. Depth varies by ecosystem.

### Cut the exposure window

One policy edit rolls out in minutes, with [no upgrade PR needed to halt new spread](https://chain305.com/product/how-it-works/).

### Give devs a useful error

The refusal names the rule, the reason and who owns the exception path.

Zero-disruption rollout

## Get to blocking in three moves

1.  01
    
    Point package managers at Chainsaw
    
    One registry line per package manager. No build-script changes, no laptop agent.
    
2.  02
    
    Start in monitor mode
    
    See what your rules would have blocked across every repo, with no build broken.
    
3.  03
    
    Flip to enforcement
    
    Per-policy toggle. Enforce the rules you trust; keep the rest in monitor.
    

Ready to cut the exposure window?

## Start free, turn on monitor mode this week

See what Chainsaw would have blocked before you enforce anything.

[Start free](https://chain305.com/chainsaw/signup) [Talk to sales](https://cal.com/chain305/30min)

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## Long form

The full text behind this page, including detail the page itself leaves out.

For AppSec

### Stop new CVE exposure without waiting on upgrade PRs

When a new CVE drops, push one policy edit and the affected version stops installing — across every repo, every CI job, every laptop. No coordinated upgrade PR. No waiting on a scanner re-run. A scanner finds log4j after it's already in six services; Chainsaw refuses it on the seventh, and every install after.

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

##### Refuse bad packages on the install path

[Vulnerability, license, and version rules](https://chain305.com/pricing/) 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 our per-ecosystem coverage matrix).

##### Cut the exposure window

Policy edits roll out globally in minutes. The affected version stops installing everywhere — [no coordinated upgrade PR required to halt new spread](https://chain305.com/product/how-it-works/).

##### 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.

[Block this CVE class today](https://chain305.com/chainsaw/signup) [Talk to security](https://cal.com/chain305/30min)