Agentic AppSec: Software Development Went Agentic. Security Didn’t.

AI is changing how software gets built. Coding agents produce more code than teams can review, and current models introduce several times more vulnerabilities per line than human developers. Many of those flaws involve business logic, access control, and authentication, areas where pattern-based scanners have limited visibility.

Most security teams were already behind before any of this started. They are flooded with findings, many of which are noise, while managing a backlog of latent risk. Attackers are using AI to identify weaknesses, combine lower-severity issues into more serious exploits, and accelerate attacks. As of October 2026, Snyk’s data showed roughly eight new vulnerabilities introduced for every one remediated. AI-driven development adds further pressure to that imbalance. And the in-depth security reviews that catch business logic flaws take so much time and context that most teams run them once, for a handful of critical apps.

Software supply chain attacks compound the problem. Malicious packages now account for most open source zero-days, with more than 20 high-profile attacks in 2026 and growth on track to exceed 600% year over year. A malicious package can steal credentials during installation, before a pull request or CI scan runs, and coding agents can introduce these packages without assessing whether they are safe.

Security needs to keep pace with how software is now built and address risks before code reaches review.

The pull request scan is no longer enough on its own  

Pull request scanning remains an important control. On its own, however, it cannot address every risk, particularly when code is generated continuously, and malicious dependencies can cause harm before a scan begins.

Application security has to run in three places: checks inside the coding workflow, fast deterministic scans on every change in CI, and deeper analysis of the full application at regular intervals. That analysis must also account for business logic and application context alongside known vulnerability patterns.

Finding more issues is only useful if teams can act on them. Prevention and remediation need to scale too, with clear policies governing what gets blocked, what gets fixed, and what requires human review. Proposed fixes need independent validation before teams accept them.

The answer is not another scanner. It’s the program, run by agents and owned by your team. 

Introducing Evo Agentic AppSec

Evo Agentic AppSec is a team of security agents that does the work of your application security program, so your team can focus on setting policy and owning the decisions. It brings these capabilities together to help teams manage application security continuously, from threat assessment and prevention through detection, prioritization, remediation, and verification.

It helps teams assess an application’s threats and controls, identify vulnerabilities, prioritize fixes, and validate the results. The agents work across new code during development, helping to prevent new issues and block the install of malicious packages, and across the applications you have already shipped, so the backlog actually goes down. 

Snyk’s security intelligence provides the context behind this work. It combines ten years of deterministic assessments with signals such as reachability, exploitability, breakability, and fix outcomes. That context helps teams separate the issues that matter from the noise, and turns a proposed change into a fix a team can use.

In VulnBump, Snyk’s newest benchmark of real dependency upgrades, Evo Remediation Agent produced mergeable fixes 90% of the time, compared with 59.6% for the same model without Snyk context. A mergeable fix resolves the vulnerability and leaves the project able to build.

Independent verification is central to this approach. Deterministic engines check proposed fixes rather than relying solely on the model that generated them. Teams define the policies and acceptance criteria that govern the process.

Agentic AppSec is the next solution coming to Evo, the part of the Snyk platform built to help teams secure both the applications they develop and the AI agents they deploy.

How it works

Evo Agentic AppSec brings together a team of agents with specific roles:

• Evo Agentic Security Review assesses an application’s threats and controls, producing evidence-backed findings and remediation guidance. Now, that depth of review can run across every application, without scaling your team.

• Evo Code Scanning Agent identifies business logic and authorization flaws that traditional scanners miss.

• Snyk Secrets detects exposed secrets across traditional and AI-assisted development.

• Evo Remediation Agent fixes issues in new code and the existing backlog, starting with third-party dependency issues at launch.

• Evo Dependency Firewall blocks malicious and out-of-policy packages at install time, before code scanning ever comes into play. You don’t have to tell your agents to be careful about what they install; they pull from trusted packages by default.

Evo Continuous Offensive Security provides adversarial testing to further assess the application’s defenses and the effectiveness of remediation.

Together, these capabilities help teams expand security coverage and handle more remediation work, while keeping a human on the loop, retaining control over policies, priorities, and approvals.

Evo Agentic AppSec builds on Snyk Code and Snyk Open Source. The engines that teams already use to scan code and dependencies provide the underlying analysis and independently validate findings and proposed fixes.

Giving teams more capacity

As more development and security work becomes automated, teams need clear oversight and accountability.

Developers can spend more time reviewing proposed changes. AppSec teams can focus on security policy, exceptions, and the risks that require their judgment. CISOs gain visibility into a continuously running program, with adversarial testing and an audit trail of automated decisions.

For organizations without a dedicated AppSec function, these capabilities can help establish consistent security practices and reduce the manual work needed to maintain them.

The goal is practical: prevent more issues, resolve existing vulnerabilities faster, and give teams evidence that their fixes work.

See it for yourself

Today: 

• Traditional scanners are missing your most critical issues

• Your backlog is growing faster than it can be burned down

• Coding agents keep committing your secrets

• Malicious packages that cause harm at install 

Evo Agentic AppSec brings prevention, detection, remediation, and verification to help teams address those challenges.

Interested in putting a team of security agents next to every engineer? Talk to your Snyk account representative about early access to the agents. Or keep an eye out for more Agentic AppSec announcements to come!