---
cve: "CVE-2026-100870"
severity: "HIGH"
cvss: 8.7
epss: ""
vendor: "Sylius"
kev: false
exploited: false
published: "2026-09-27 13:16:38"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-29T06:28:10+02:00"
---

# CVE-2026-100870

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 build administrator password-reset links using the request Host header without validation, allowing unauthenticated attackers to redirect reset tokens to attacker-controlled domains. Attackers can request password resets for known administrator email addresses with forged Host headers to intercept valid reset tokens and take over administrator accounts.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-27 14:29:44
- CNA-CVSS: **8.7** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- b3561f3fbd6a2b10d8d5bd7532b7cadecadb6fa7 (Commit)
- 5c7dbe3788f259abbdd7d62a4f281439c6b85bb1 (Commit)

## Referenzen

- <https://github.com/Sylius/Sylius/security/advisories/GHSA-77w3-2367-7xvq>
- <https://github.com/Sylius/Sylius/pull/19215>
- <https://github.com/Sylius/Sylius/commit/1255d75b20d3d88a5e5c8d46791504134c838480>
- <https://github.com/Sylius/Sylius/releases/tag/v2.2.9>
- <https://github.com/Sylius/Sylius>
- <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>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-100870) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_