cve-check

cve-check is a skill for Claude Code, Codex from Phaedra-Solutions/cursor-rules. It costs 87 tokens per session (1,865 once invoked), scanned A, original, MIT.

A package vulnerability checker that looks up one exact package version in public security databases and vendor advisories.

In plain words
What is it for?
Use it to report advisory IDs, severity, affected and fixed versions, and whether the issue is being exploited.
Why use it?
It helps determine whether a dependency has known security problems and which versions fix them before you add, pin, or upgrade it.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to report advisory IDs, severity, affected and fixed versions, and whether the issue is being exploited.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/phaedra-solutions/cursor-rules/cve-check
Install

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.

Any agent
npx skills add Phaedra-Solutions/cursor-rules --skill cve-check
Clone the repo
git clone --depth 1 https://github.com/Phaedra-Solutions/cursor-rules

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cve-check

README.md
[![agentmods](https://agentmods.dev/badge/skills/phaedra-solutions/cursor-rules/cve-check/github.svg)](https://agentmods.dev/skills/phaedra-solutions/cursor-rules/cve-check)
Your own site
<a href="https://agentmods.dev/skills/phaedra-solutions/cursor-rules/cve-check"><img src="https://agentmods.dev/badge/skills/phaedra-solutions/cursor-rules/cve-check/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cve-check

Your own site · 80×15
<a href="https://agentmods.dev/skills/phaedra-solutions/cursor-rules/cve-check"><img src="https://agentmods.dev/badge/skills/phaedra-solutions/cursor-rules/cve-check.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 87 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,865 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00087 $0.01865
Opus 5.5 $0.00035 $0.00746
Sonnet 5.5 $0.00017 $0.00373
Haiku 4.5 $0.00009 $0.00186

Measured 3d ago against content hash 6293c134da26, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cve-check 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 3d 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.

- These lookups use public APIs. `gh api` uses the user's GitHub login, which raises rate limits; plain `curl` against `api.github.com` is limited to 60 requests an hour.
skills/cve-check/SKILL.md · 100 lines

How it starts

The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CVE check

When to use

  • The user asks whether a package version is vulnerable, or which version fixes an advisory.
  • Before pinning, adding or upgrading to a specific version.
  • When a rule's "Known vulnerabilities" table needs live verification (those tables go stale).

For a whole-project scan use security-audit. For a package that isn't installed yet use dependency-vet first.

Before you start

  • Get the exact package name, ecosystem and installed version. Read the version from the lockfile, not the manifest range.
  • OSV ecosystem names: npm, PyPI, Go, crates.io, Packagist, RubyGems, NuGet, Maven (name as group:artifact), Pub. GitHub uses lowercase: npm, pip, go, rust, composer, rubygems, nuget, maven, pub.
  • These lookups use public APIs. gh api uses the user's GitHub login, which raises rate limits; plain curl against api.github.com is limited to 60 requests an hour.

Steps

  1. Query OSV for the version. It aggregates GHSA, PyPA, RustSec, Go and malware (MAL-) databases.

    curl -s -X POST https://api.osv.dev/v1/query \
      -d '{"package":{"name":"next","ecosystem":"npm"},"version":"16.4.0"}' \
      | jq -r '.vulns[]? | [.id, ((.aliases // []) | map(select(startswith("CVE-"))) | join(",")),
          (.database_specific.severity // "?"),
          ([.affected[] | select(.package.name=="next") | .ranges[]?.events[]? | select(.fixed) | .fixed] | join(" ")),
          .summary] | @tsv'
    

    For several packages at once, POST https://api.osv.dev/v1/querybatch with {"queries":[…]} returns IDs only. Fetch details per ID:

    curl -s https://api.osv.dev/v1/vulns/GHSA-p3m5-59mp-jv5r \
      | jq '{id, aliases, published, severity: [.severity[]?.score], affected: [.affected[] | {pkg: .package.name, events: [.ranges[]?.events[]?]}], refs: [.references[]?.url][0:5]}'
    
  2. Query the GitHub Advisory Database for the same version, to cross-check severity, CVSS, EPSS and the first patched version:

Read the full file on GitHub · 100 lines

Changes

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.

  1. 3d ago First seen · 100 lines · 87 tokens per session scan A 6293c134da26

Subscribe to this mod's changes

cve-check is a skill published in the GitHub repository Phaedra-Solutions/cursor-rules (4 stars, last pushed 2d ago), licensed MIT. It adds 87 tokens to every session and 1,865 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-11-01.

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