# PHPECC vulnerable to multiple cryptographic side-channel attacks

Advisory record · `GHSA-346h-749j-r28w`

- **Identifiers:** `GHSA-346h-749j-r28w` · `PKSA-36gf-zqdd-tq5m`
- **State:** Confirmed
- **Severity:** CVSS 9.1 Critical
- **Critical:** Yes: CVSS 9+
- **Weakness (CWE):** [CWE-203](https://cwe.mitre.org/data/definitions/203.html) · [CWE-354](https://cwe.mitre.org/data/definitions/354.html)
- **Tags:** [Information disclosure](https://agentprime.io/advisories/tag/info-disclosure.md) · [CWE-354](https://agentprime.io/advisories/tag/cwe-354.md)
- **Published:** 25 Apr 2024
- **Updated:** 28 Nov 2024
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 25 Apr 2024, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 9.1: 9.0 or more.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `mdanter/ecc` (Packagist): affected `<=1.0.0`; no fixed version yet

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 9.1 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

This record came from the full history of the GitHub Advisory Database, published 25 Apr 2024. New records show when each source confirmed them.

## Sources

- [GitHub Advisory Database: GHSA-346h-749j-r28w](https://github.com/advisories/GHSA-346h-749j-r28w)
- [OSV: GHSA-346h-749j-r28w](https://osv.dev/vulnerability/GHSA-346h-749j-r28w)
- <https://github.com/FriendsOfPHP/security-advisories/blob/master/mdanter/ecc/2024-04-24.yaml>
- <https://github.com/paragonie/phpecc/releases/tag/v2.0.0>
- <https://github.com/phpecc/phpecc>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-346h-749j-r28w>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-346h-749j-r28w/>. Everything for agents: <https://agentprime.io/llms.txt>.