OWASP Top 10 for Agentic Applications:2026

ASI01:2026

Agent Goal Hijack

Agent Goal Hijack occurs when an attacker embeds prompt exploits in external data or RAG context to steer an autonomous agent away from its original user objective toward malicious tasks.

Why it matters

An agent can be coerced into revealing secrets, approving unauthorized transactions, or corrupting critical system data.

Risk-reduction focus

• Enforce goal-scoping and authorization bounds at the application layer.
• Isolate external untrusted data from system prompt instructions.
• Require human approval for high-risk goal transitions.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI02:2026

Tool Misuse and Exploitation

Tool Misuse and Exploitation happens when an agent invokes connected tools or APIs with unvalidated parameters, enabling an attacker to trigger harmful actions like data deletion or internal API calls.

Why it matters

Attackers leverage the agent's tool access to manipulate internal databases or exfiltrate confidential records.

Risk-reduction focus

• Enforce strict parameter schemas and reject unexpected inputs.
• Apply least privilege access to tools used by agents.
• Audit and log all tool executions.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI03:2026

Identity and Privilege Abuse

Identity and Privilege Abuse occurs when an agent operates with excessive privileges or shared accounts, enabling unprivileged users to execute admin actions or cross tenant boundaries via the agent's identity.

Why it matters

Attackers achieve privilege escalation or breach multi-tenant user boundaries through the agent's identity.

Risk-reduction focus

• Delegate user context explicitly to the agent.
• Prohibit shared admin or root service accounts.
• Revoke transient agent tokens upon task completion.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI04:2026

Agentic Supply Chain Vulnerabilities

Agentic Supply Chain Vulnerabilities involve incorporating untrusted third-party agents, plugins, or prompt templates that contain backdoors or data-exfiltration logic.

Why it matters

Malicious dependencies alter agent behavior, siphon sensitive data, or open unauthorized access channels.

Risk-reduction focus

• Inventory all agent dependencies and verify digital signatures.
• Assess vendor security standards before integration.
• Continuously scan supporting software for vulnerabilities.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI05:2026

Unexpected Code Execution

Unexpected Code Execution occurs when an agent generates and executes dynamic code directly on host systems without sandbox isolation, allowing attackers to achieve remote code execution.

Why it matters

An attacker achieves remote code execution (RCE) and gains full control over the underlying infrastructure.

Risk-reduction focus

• Execute agent-generated code inside network-isolated sandboxes.
• Enforce strict resource and runtime limits.
• Validate and inspect system commands prior to execution.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI06:2026

Memory and Context Poisoning

Memory and Context Poisoning happens when malicious data is written into an agent's long-term memory or vector store, corrupting its future reasoning and decision-making capabilities.

Why it matters

The agent produces biased decisions, outputs false guidance, or executes latent malicious instructions.

Risk-reduction focus

• Validate data integrity and permissions before storing in memory.
• Isolate memory stores between different tenants.
• Periodically audit memory quality and purge stale context.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI07:2026

Insecure Inter-Agent Communication

Insecure Inter-Agent Communication occurs when messages exchanged across a multi-agent network lack mutual authentication or encryption, allowing adversaries to spoof agents or tamper with commands.

Why it matters

An attacker impersonates peer agents, tampers with inter-agent messages, or injects malicious requests into the network.

Risk-reduction focus

• Encrypt and authenticate inter-agent communications using mTLS or signed tokens.
• Enforce message schemas between agents.
• Verify agent identity before processing commands.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI08:2026

Cascading Failures

Cascading Failures occur when an exploit or error in one agent rapidly propagates across interconnected agents due to missing circuit breakers and loop safeguards.

Why it matters

The entire agent network crashes, consumes excessive resources, or causes widespread data corruption.

Risk-reduction focus

• Enforce recursion depth and call-count limits on agent workflows.
• Deploy automated circuit breakers to isolate failing agents.
• Establish fail-safe isolation and recovery runbooks.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI09:2026

Human-Agent Trust Exploitation

Human-Agent Trust Exploitation leverages the anthropomorphic and persuasive nature of AI agents to deceive human operators into approving harmful actions or revealing credentials.

Why it matters

Users unsuspectingly disclose credentials, authorize wire transfers, or execute untrusted files.

Risk-reduction focus

• Display clear indicators when interacting with AI agents.
• Require out-of-band verification for critical transactions.
• Train users on social engineering risks involving agents.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }

ASI10:2026

Rogue Agents

Rogue Agents are autonomous agents that deviate from their intended goals, enter uncontrolled loops, or become unresponsive to admin controls, draining system resources and triggering unintended traffic.

Why it matters

Cloud resources are depleted, costs skyrocket, and unauthorized traffic is flooded toward external targets.

Risk-reduction focus

• Implement real-time behavioral monitoring and anomaly detection for agents.
• Provide an emergency kill switch to instantly revoke agent tokens.
• Set strict budget and runtime caps per execution task.

// Vulnerable pattern: trust request-controlled target
app.Get("/records/:id", func(c fiber.Ctx) error {
  return c.JSON(repo.Find(c.Params("id")))
})

// Fixed pattern: authorize server-side
if !policy.CanRead(c.Locals("principal"), id) { return fiber.ErrForbidden }