IAST: Interactive Application Security Testing in Cybersecurity

Application Security
ByDecipherU Editorial
How is it pronounced?
eye-ast/aɪˈæst/

Two syllables: 'I' plus 'ast'.

IAST stands for Interactive Application Security Testing. Interactive Application Security Testing combines SAST and DAST by instrumenting the application from within during runtime. IAST agents monitor code execution paths, data flows, and library calls while the application handles traffic, producing results with low false-positive rates.

How IAST Is Used in Cybersecurity

Security engineers deploy IAST agents in QA environments to catch vulnerabilities during functional testing without running separate security scans. Security architects evaluate IAST tools for applications where false-positive reduction is a priority. The accuracy of IAST findings speeds up triage when security teams are outnumbered by development teams.

Read the full glossary entry: IAST in Cybersecurity

Cybersecurity Roles That Work with IAST

Related Cybersecurity Acronyms

Frequently asked questions

What does IAST stand for?

IAST stands for Interactive Application Security Testing. Interactive Application Security Testing combines SAST and DAST by instrumenting the application from within during runtime. IAST agents monitor code execution paths, data flows, and library calls while the application handles traffic, producing results with low false-positive rates.

What is IAST used for in cybersecurity?

Security engineers deploy IAST agents in QA environments to catch vulnerabilities during functional testing without running separate security scans. Security architects evaluate IAST tools for applications where false-positive reduction is a priority. The accuracy of IAST findings speeds up triage when security teams are outnumbered by development teams.

Last verified: April 2026?Report an inaccuracy