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Vulnerability record · CVE-2026-45074 · published 14 July 2026

CVE-2026-45074: Sensiolabs symfony authentication bypass by spoofing vulnerability

Sensiolabs · Symfony

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.1.0 until 7.4.12 and 8.0.12, Cas2Handler builds the CAS service parameter from Request::getSchemeAndHttpHost(), which reflects an attacker-controlled Host header when framework.trusted_hosts is not configured; an attacker controlling another application registered with the same CAS server can replay a victim ticket against the Symfony application and authenticate as the victim. This issue is fixed in versions 7.4.12 and 8.0.12.

7.6 CVSS 4.0 High EPSS 0.49% · top 60.4% CWE-290 · Authentication bypass by spoofing
7.6CVSS 4.0 base score
0.49%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
15 Jul 2026Last modified by NVD

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.1.0 until 7.4.12 and 8.0.12, Cas2Handler builds the CAS service parameter from Request::getSchemeAndHttpHost(), which reflects an attacker-controlled Host header when framework.trusted_hosts is not configured; an attacker controlling another application registered with the same CAS server can replay a victim ticket against the Symfony application and authenticate as the victim. This issue is fixed in versions 7.4.12 and 8.0.12.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541 Patch
https://github.com/symfony/symfony/releases/tag/v7.4.12 ProductRelease Notes
https://github.com/symfony/symfony/releases/tag/v8.0.12 ProductRelease Notes
https://github.com/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhx PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-45074), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.