CVE-2026-45074 json
Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay
published 2026-05-27 5 mo ago modified 2026-09-10 1 mo ago also GHSA-j8gj-9rm5-4xhx , EUVD-2026-44338
- cvss
- 8.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 42%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist symfony/security-http 7.4.12, 8.0.12
- packagist symfony/symfony 7.4.12, 8.0.12
- sensiolabs symfony 7.4.12, 8.0.12
- symfony Debian 14 7.4.12+dfsg-1
debian advisories DEBIAN-CVE-2026-45074
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.6 | 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 |
| CNA | 4.0 | 7.6 | 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:X/V:X/RE:X/U:X |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | symfony/security-http | >=7.1.0, <7.4.12 >=8.0.0, <8.0.12 |
7.4.12 8.0.12 |
| packagist | symfony/symfony | >=7.1.0, <7.4.12 >=8.0.0, <8.0.12 |
7.4.12 8.0.12 |
Affected products
- symfony symfony
- symfony security-http
Classification
- Weakness
-
- CWE-290 Authentication Bypass by Spoofing
References
-
github.com
/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541
web, patch
-
github.com
/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhx
web, patch, vendor-advisory
-
github.com
/symfony/symfony/releases/tag/v7.4.12
product, release-notes
-
github.com
/symfony/symfony/releases/tag/v8.0.12
product, release-notes
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2026-45074.yaml
web
-
github.com
/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45074.yaml
web
-
github.com
/symfony/symfony
package
-
symfony.com
/cve-2026-45074
web
Sources
- CVE List CVE-2026-45074
- GitHub Advisory GHSA-j8gj-9rm5-4xhx
- NVD CVE-2026-45074
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