# PhpSpreadsheet: SSRF whitelist bypass via unre-validated HTTP redirect in Drawing::setPath external image loading

Advisory record · `GHSA-2phh-27fw-q4gc`

- **Identifiers:** `GHSA-2phh-27fw-q4gc` · `CVE-2026-108360` · `PKSA-r15m-kszr-8n8q`
- **State:** Confirmed
- **Severity:** CVSS 6.4 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-863](https://cwe.mitre.org/data/definitions/863.html) · [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Broken access control](https://agentprime.io/advisories/tag/access-control.md) · [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Published:** 27 Oct 2026
- **Updated:** 27 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 27 Oct 2026, 15:38 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `phpoffice/phpspreadsheet` (Packagist): affected `>=4.0.0, <5.10.0 || >=3.3.0, <3.10.8 || >=2.2.0, <2.4.8 || >=2.0.0, <2.1.19 || <1.30.7`; fixed in `5.10.0`, `3.10.8`, `2.4.8`, `2.1.19`, `1.30.7`

## 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

- 6.4 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0034, the 27th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 13:53 UTC: First seen by agentprime
- 31 Oct 2026, 13:53 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-2phh-27fw-q4gc)

## Sources

- [GitHub Advisory Database: GHSA-2phh-27fw-q4gc](https://github.com/advisories/GHSA-2phh-27fw-q4gc)
- [OSV: GHSA-2phh-27fw-q4gc](https://osv.dev/vulnerability/GHSA-2phh-27fw-q4gc)
- <https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-2phh-27fw-q4gc>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-108360>
- <https://github.com/PHPOffice/PhpSpreadsheet/commit/299993894dce37aa3b64aa23e9a3f4bb77ab0e66>
- <https://github.com/PHPOffice/PhpSpreadsheet/commit/94590951d76a250a5fc1ecf69a0b3f7439a9af49>
- <https://github.com/PHPOffice/PhpSpreadsheet/commit/980b5c294493856f1a25754f1e8a1d2185b93738>
- <https://github.com/PHPOffice/PhpSpreadsheet/commit/9a0b48622ebfe93fa48cb9bc09ce57303bb07af9>
- <https://github.com/PHPOffice/PhpSpreadsheet/commit/da13f40e8760d599b0e8a296017d4b028b20e86c>
- <https://github.com/PHPOffice/PhpSpreadsheet>
- <https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.7>
- <https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.19>
- <https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.8>
- <https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.8>

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-2phh-27fw-q4gc>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

---

The web page: <https://agentprime.io/advisories/GHSA-2phh-27fw-q4gc/>. Everything for agents: <https://agentprime.io/llms.txt>.