Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add rules/ivangrynenko/cursorrules/javascript-software-data-integrity-failuresgit clone --depth 1 https://github.com/ivangrynenko/cursorrulesWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.05588 |
| Opus 5 | $0.00000 | $0.02794 |
| Sonnet 5 | $0.00000 | $0.01118 |
| Haiku 4.5 | $0.00000 | $0.00559 |
Grade A, and why
javascript-software-data-integrity-failures scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const pluginCode = await fetch(pluginPath).then(r => r.text()); Copies of this mod
1 near-identical copy found in the catalogue:
- javascript-software-data-integrity-failures — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 663 lines — stays where its author put it; the contents beside it link to each section on GitHub.
JavaScript Software and Data Integrity Failures (OWASP A08:2021)
actions:
-
type: enforce conditions:
Pattern 1: Insecure Deserialization
- pattern: "(?:JSON\.parse|eval)\s*\((?:[^)]|\n)*(?:localStorage|sessionStorage|document\.cookie|location|window\.name|fetch|axios|\$\.(?:get|post)|XMLHttpRequest)" message: "Insecure deserialization of user-controlled data detected. Validate and sanitize data before parsing JSON or using eval."
Pattern 2: Missing Subresource Integrity
- pattern: "<script\s+src=['"][^'"]+['"]\s*>" negative_pattern: "integrity=['"]sha(?:256|384|512)-[a-zA-Z0-9+/=]+" message: "Script tag without Subresource Integrity (SRI) hash. Add integrity and crossorigin attributes for third-party scripts."
Pattern 3: Insecure Package Installation
- pattern: "(?:npm|yarn)\s+(?:install|add)\s+(?:[\w@\-\.\/:]+\s+)*--no-(?:verify|integrity|signature)" message: "Package installation with integrity checks disabled. Always verify package integrity during installation."
Pattern 4: Insecure Object Deserialization
- pattern: "(?:require|import)\s+'"['"]" message: "Using potentially unsafe serialization/deserialization libraries. Ensure proper validation and sanitization of serialized data."
Pattern 5: Missing Dependency Verification
- pattern: "package\.json" negative_pattern: ""(?:scripts|devDependencies)":\s*{[^}]"(?:audit|verify|check)":\s"(?:npm|yarn)\s+audit" file_pattern: "package\.json$" message: "Missing dependency verification in package.json. Add npm/yarn audit to your scripts section."
Pattern 6: Insecure Dynamic Imports
- pattern: "(?:import|require)\s*\(\s*(?:variable|[a-zA-Z_$][a-zA-Z0-9_$]|
[^]`|'[^']'|"[^"]")\s*\)" negative_pattern: "(?:allowlist|whitelist|validate)" message: "Potentially insecure dynamic imports. Validate or restrict the modules that can be dynamically imported."
Pattern 7: Prototype Pollution
- pattern: "Object\.assign\(\s*(?:[^,]+)\s*,\s*(?:JSON\.parse|req\.body|req\.query|req\.params|formData\.get)" message: "Potential prototype pollution vulnerability. Use Object.create(null) or sanitize objects before merging."
Pattern 8: Missing CI/CD Pipeline Integrity Checks
- pattern: "(?:\.github\/workflows\/|\.gitlab-ci\.yml|azure-pipelines\.yml|Jenkinsfile)" negative_pattern: "(?:npm\s+audit|yarn\s+audit|checksum|integrity|verify|signature)" file_pattern: "(?:\.github\/workflows\/.*\.ya?ml|\.gitlab-ci\.yml|azure-pipelines\.yml|Jenkinsfile)$" message: "Missing security checks in CI/CD pipeline. Add dependency scanning, integrity verification, and signature validation."
Pattern 9: Insecure Update Mechanism
- pattern: "(?:update|upgrade|install)\s*\([^)]\)\s\{[^}]*?\}" negative_pattern: "(?:verify|checksum|hash|signature|integrity)" message: "Potentially insecure update mechanism. Implement integrity verification for all updates."
Pattern 10: Insecure Plugin Loading
- pattern: "(?:plugin|addon|extension)\.(?:load|register|install|add)\s*\([^)]*\)" negative_pattern: "(?:verify|validate|checksum|hash|signature|integrity)" message: "Insecure plugin loading mechanism. Implement integrity verification for all plugins."
Pattern 11: Insecure Data Binding
- pattern: "(?:eval|new\s+Function|setTimeout|setInterval)\s*\(\s*(?:[^,)]+\.(?:value|innerHTML|innerText|textContent)|[^,)]+\[[^\]]+\])" message: "Insecure data binding using eval or Function constructor. Use safer alternatives like JSON.parse or template literals."
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 663 lines · 5,588 tokens per session scan A 1e49cab578ec
javascript-software-data-integrity-failures is a cursor rule published in the GitHub repository ivangrynenko/cursorrules (87 stars, last pushed 10mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 5,588 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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