Vulnerability in Sylius
CVE-2026-100870
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.
Published .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/Sylius/Sylius (product)
- github.com/Sylius/Sylius/commit/1255d75b20d3d88a5e5c8d46791504134c838480 (patch)
- github.com/Sylius/Sylius/pull/19215 (issue-tracking, patch)
- github.com/Sylius/Sylius/releases/tag/v2.2.9 (release-notes)
- github.com/Sylius/Sylius/security/advisories/GHSA-77w3-2367-7xvq (vendor-advisory)
- www.vulncheck.com/advisories/sylius-before-1.12.25-1.13.17-1.14.20-2.1.16-and-2… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100870?
- CVE-2026-100870 is a high-severity vulnerability in Sylius, classified under Weak Password Recovery Mechanism for Forgotten Password. CVSS score: 8.8/10. Published 2026-09-27.
- How severe is CVE-2026-100870?
- High severity. CVSS v3 base score is 8.8 out of 10.