Plain English vulnerability monitoring
Know when your stack is at risk
StackFlag watches public vulnerability databases every hour and tells you what matters, why it matters, and what to do about it. No security expertise needed.
How StackFlag works
Define your stack
Describe your setup in plain English - nginx, WordPress, PostgreSQL, Node.js, whatever you run. StackFlag sets up your stacks automatically. No security expertise needed.
We flag what matters
When a vulnerability matches your stack, StackFlag flags it with a plain-English summary, how serious it is, how quickly to fix it, and what to do about it.
Get alerted your way
Email digests, instant alerts, or webhooks - choose how and when you hear about it. Triage with read/unread/acknowledge and keep an audit trail for compliance.
How quickly to fix it, not just how bad it is
A severity score cannot tell you what to patch first. StackFlag gives every vulnerability a fix-by deadline instead, using the risk model CISA introduced for US federal agencies in 2026: is it known to be exploited, can attacks be automated, does it give full control, and can the software be reached from the internet.
Tell us which stacks are internet-facing and every flag shows the one deadline that applies to you.
How deadlines are setBuilt for teams with compliance obligations
Vulnerability monitoring is a named control in every major security standard. StackFlag provides the continuous monitoring and triage evidence these frameworks require.