# yiisoft/yii2 Mishandles the Attaching of Behavior Defined by a \`\_\_class\` Array Key Advisory record · `GHSA-ggwg-cmwp-46r5` - **Identifiers:** `GHSA-ggwg-cmwp-46r5` · `CVE-2024-58136` · `PKSA-zmx9-v1jv-dy8s` - **State:** Confirmed - **Severity:** CVSS 9.0 Critical - **Critical:** Yes: KEV, CVSS 9+, CVSS 7+ and EPSS - **Weakness (CWE):** [CWE-424](https://cwe.mitre.org/data/definitions/424.html) - **Tags:** [CWE-424](https://agentprime.io/advisories/tag/cwe-424.md) - **Published:** 10 Apr 2025 - **Updated:** 22 Oct 2025 - **Reviewed by a person:** No Published by the GitHub Advisory Database at 10 Apr 2025, 03:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. ## Critical Critical, because: - In CISA’s KEV catalogue since 2 May 2025: it is known to be exploited. - CVSS score 9.0: 9.0 or more. - CVSS score 9.0 (7.0 or more) and EPSS 0.88 (0.1 or more): a high score and a real chance of exploitation in the next 30 days. How we decide what’s critical: ## Affected packages - `yiisoft/yii2` (Packagist): affected `<2.0.52`; fixed in `2.0.52` ## Machine-written summary Summary written by Claude Haiku from the source advisory. Not reviewed by a person. > yiisoft/yii2 versions before 2.0.52 mishandle the attaching of behaviors defined by a \_\_class array key. The source gives few details on the conditions required or the exact impact, but states that this is a regression of CVE-2024-4990 and was exploited in the wild between February and April 2025. Upgrade yiisoft/yii2 to version 2.0.52 or later. Written 3 Nov 2026. ## 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 - 9.0 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H`, from CNA (mitre) - **CISA KEV:** Listed since 2 May 2025: known to be exploited. - **EPSS:** 0.88, the 99th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline - 31 Oct 2026, 14:26 UTC: First seen by agentprime - 31 Oct 2026, 14:26 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-ggwg-cmwp-46r5) ## Sources - [GitHub Advisory Database: GHSA-ggwg-cmwp-46r5](https://github.com/advisories/GHSA-ggwg-cmwp-46r5) - [OSV: GHSA-ggwg-cmwp-46r5](https://osv.dev/vulnerability/GHSA-ggwg-cmwp-46r5) - - - - - - - - - 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 (), 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: - In a browser: reads your lockfile in the browser, never uploading it. - Whether it touches your code, with file and line: the Claude Code plugin, - As JSON: , or `POST https://api.agentprime.io/v1/match` with your packages () --- The web page: . Everything for agents: .