---
title: "CVE-2026-100870: Sylius - Open Redirect"
description: "Sylius < 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 contains an open redirect vulnerability caused by unvalidated use of the request Host header in administrator password-reset links, letting unauthenticated attackers redirect reset tokens to attacker-controlled domains, exploit requires attacker to send forged Host headers."
url: https://panop.io/threat-heartbeat/CVE-2026-100870/
---

# CVE-2026-100870 Sylius - Open Redirect

Sylius < 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 contains an open redirect vulnerability caused by unvalidated use of the request Host header in administrator password-reset links, letting unauthenticated attackers redirect reset tokens to attacker-controlled domains, exploit requires attacker to send forged Host headers.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.31% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100870)

## Details

Type

Open Redirect

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

27 September 2026

Updated

15 October 2026

Weakness

[CWE-640](https://cwe.mitre.org/data/definitions/640.html)

## Vendor fix

Update to versions 1.12.25, 1.13.17, 1.14.20, 2.1.16, 2.2.9 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100870](https://nvd.nist.gov/vuln/detail/CVE-2026-100870)
- [https://github.com/Sylius/Sylius/commit/1255d75b20d3d88a5e5c8d46791504134c838480](https://github.com/Sylius/Sylius/commit/1255d75b20d3d88a5e5c8d46791504134c838480)
- [https://github.com/Sylius/Sylius/pull/19215](https://github.com/Sylius/Sylius/pull/19215)
- [https://github.com/Sylius/Sylius/releases/tag/v2.2.9](https://github.com/Sylius/Sylius/releases/tag/v2.2.9)
- [https://github.com/Sylius/Sylius/security/advisories/GHSA-77w3-2367-7xvq](https://github.com/Sylius/Sylius/security/advisories/GHSA-77w3-2367-7xvq)
- [https://www.vulncheck.com/advisories/sylius-before-1.12.25-1.13.17-1.14.20-2.1.16-and-2.2.9-admin-password-reset-poisoning-via-host-header](https://www.vulncheck.com/advisories/sylius-before-1.12.25-1.13.17-1.14.20-2.1.16-and-2.2.9-admin-password-reset-poisoning-via-host-header)
- [https://github.com/Sylius/Sylius](https://github.com/Sylius/Sylius)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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