# Pimcore: Account Takeover via Password Reset URL Injection allows unauthenticated attacker to hijack any admin account with 2FA bypass

Advisory record · `GHSA-h854-c3m3-mh5v`

- **Identifiers:** `GHSA-h854-c3m3-mh5v` · `CVE-2026-55207` · `PKSA-spw3-r32w-35m6`
- **State:** Confirmed
- **Severity:** CVSS 8.8 High
- **Critical:** No
- **Weakness (CWE):** [CWE-640](https://cwe.mitre.org/data/definitions/640.html)
- **Tags:** [CWE-640](https://agentprime.io/advisories/tag/cwe-640.md)
- **Published:** 28 Aug 2026
- **Updated:** 28 Aug 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 28 Aug 2026, 19:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `pimcore/studio-backend-bundle` (Packagist): affected `<2025.4.6 || >=2026.1.0, <2026.1.6`; fixed in `2025.4.6`, `2026.1.6`

## 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

- 8.8 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0067, the 51st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:06 UTC: First seen by agentprime
- 31 Oct 2026, 14:06 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-h854-c3m3-mh5v)

## Sources

- [GitHub Advisory Database: GHSA-h854-c3m3-mh5v](https://github.com/advisories/GHSA-h854-c3m3-mh5v)
- [OSV: GHSA-h854-c3m3-mh5v](https://osv.dev/vulnerability/GHSA-h854-c3m3-mh5v)
- <https://github.com/pimcore/pimcore/security/advisories/GHSA-h854-c3m3-mh5v>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-55207>
- <https://github.com/pimcore/studio-backend-bundle/pull/1882>
- <https://github.com/pimcore/studio-backend-bundle/commit/ea9d329686f5e5aea2eec378d63ac2deb965bb27>
- <https://github.com/pimcore/pimcore>
- <https://github.com/pimcore/studio-backend-bundle/releases/tag/v2025.4.6>
- <https://github.com/pimcore/studio-backend-bundle/releases/tag/v2026.1.6>

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-h854-c3m3-mh5v>, 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-h854-c3m3-mh5v/>. Everything for agents: <https://agentprime.io/llms.txt>.