Registry indexed
Unbounded-consumption / denial-of-wallet attacks on LLM apps — force runaway tokens, cost, or latency. Load when testing an LLM product's limits/billing, on "LLM DoS", cost amplification, or resource exhaustion. Signals: user-controlled prompts/max_tokens, agent loops, no rate/'c
Unbounded-consumption / denial-of-wallet attacks on LLM apps — force runaway tokens, cost, or latency. Load when testing an LLM product's limits/billing, on "LLM DoS", cost amplification, or resource exhaustion. Signals: user-controlled prompts/max_tokens, agent loops, no rate/'cost caps'.
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An LLM feature lets users drive expensive computation with weak limits. Unlike classic DoS, the damage is often financial (the provider bills per token) — "denial of wallet" — plus latency/availability.
Inference cost scales with tokens and calls. If the app lets users control input size, output
length (max_tokens), recursion (agent loops, tool chains), or call volume without hard caps, an
attacker amplifies cost/latency far beyond normal use.
max_tokens if client-controlled.ai-agent-tool-abuse) that burn calls.web-rate-limit-bypass) and fan out concurrent expensive requests.A single request (or a modest, controlled burst) demonstrably drives disproportionate token/cost or latency — showing missing consumption limits.
OWASP LLM Top 10 (2025) LLM10; "denial of wallet" research; provider rate/quota docs.
name: ai-llm-dos description: > Unbounded-consumption / denial-of-wallet attacks on LLM apps — force runaway tokens, cost, or latency. Load when testing an LLM product's limits/billing, on "LLM DoS", cost amplification, or resource exhaustion. Signals: user-controlled prompts/max_tokens, agent loops, no rate/'cost caps'. domain: ai-ml type: technique stability: learning modes: [bugbounty, defense] severity: medium owasp_llm: [LLM10:2025-Unbounded-Consumption] cwe: [CWE-770, CWE-400] tools: [] schema_version: 1
---
name: ai-llm-dos
description: >
Unbounded-consumption / denial-of-wallet attacks on LLM apps — force runaway tokens, cost, or
latency. Load when testing an LLM product's limits/billing, on "LLM DoS", cost amplification, or
resource exhaustion. Signals: user-controlled prompts/max_tokens, agent loops, no rate/'cost caps'.
domain: ai-ml
type: technique
stability: learning
modes: [bugbounty, defense]
severity: medium
owasp_llm: [LLM10:2025-Unbounded-Consumption]
cwe: [CWE-770, CWE-400]
tools: []
schema_version: 1
---
# LLM unbounded consumption (denial-of-wallet)
## When it applies
An LLM feature lets users drive expensive computation with weak limits. Unlike classic DoS, the
damage is often financial (the provider bills per token) — "denial of wallet" — plus latency/availability.
## Why it works
Inference cost scales with tokens and calls. If the app lets users control input size, output
length (`max_tokens`), recursion (agent loops, tool chains), or call volume without hard caps, an
attacker amplifies cost/latency far beyond normal use.
## Method
1. **Input amplification**: send very long inputs, or inputs that induce very long outputs
("repeat X 10000 times", "write an exhaustive…"); push `max_tokens` if client-controlled.
2. **Recursion / loops**: with agents, craft prompts that trigger long tool-call loops or
self-referential expansion (→ `ai-agent-tool-abuse`) that burn calls.
3. **Volume**: bypass rate limits (→ `web-rate-limit-bypass`) and fan out concurrent expensive requests.
4. **Retrieval blow-up**: in RAG, queries that pull huge context each call multiply token cost.
5. **Measure impact**: latency spike, error/timeout rates, or (where visible) token/cost per request × achievable rate.
## Gotchas
- Frame it as impact (cost/availability), not just "it was slow" — quantify tokens/cost or a service degradation.
- Respect RoE strictly — this can run up real bills / affect availability; prove with minimal, controlled requests, don't sustain an outage.
- Defenders: cap input/output tokens, per-user quotas & spend caps, loop/tool budgets, timeouts.
## Verify success
A single request (or a modest, controlled burst) demonstrably drives disproportionate token/cost or
latency — showing missing consumption limits.
## References
OWASP LLM Top 10 (2025) LLM10; "denial of wallet" research; provider rate/quota docs.
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Skill source recorded
Skill instructions are recorded. This is not a runtime test, safety guarantee or compatibility certification.
Review before install: Avoid automatic install
License: MIT
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Repository metadata and review signals are advisory. Popularity, source discovery and successful execution are different facts.
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Quality
54/100
Needs review
Trust
62/100
Sandbox only
Audit
73/100
Risky
Copies are not installs. Installation counts require a reported successful installation; they are not a blanket quality guarantee.
This page exposes the same decision, trust, audit, use-case, and install signals through the Registry API, so agents can rank this skill without scraping the UI.
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}Listing source
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