High
Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-45074
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 03:24 UTC · Revision 1
Source evidence
Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay
core-osv · Original sourcePublished 14 Jul 2026, 17:49 UTC
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.
osv:CVE-2026-45074
Complete source record
{
"id": "da103b748a4d5fc459566eba0d85b478b83968a9d7e9e632975f5ecd5a512e0e",
"url": "https://osv.dev/vulnerability/CVE-2026-45074",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Symfony: Cas2Handler Derives CAS service URL from Client Host Header → Cross-Service Ticket Replay",
"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.",
"evidence": "osv:CVE-2026-45074",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-45074",
"aliases": [
"CVE-2026-45074",
"GHSA-j8gj-9rm5-4xhx"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/symfony/security-http",
"type": "GIT",
"events": [
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{
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{
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{
"cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"range": [
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"introduced": "7.1.0"
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{
"fixed": "7.4.12"
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"source": "CPE_RANGE"
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{
"cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
"range": [
{
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{
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{
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{
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{
"fixed": "06d3b2c9a8aeb5d8493738cc51e24f6a1215827c"
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{
"fixed": "5ba145dba702404801bdf9e7e8d6df170060d541"
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"database_specific": {
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{
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],
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{
"cpe": "cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*",
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{
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"source": "REFERENCES_COMMIT"
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"source": "REFERENCES_TAG",
"original_tag": "v7.4.12"
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{
"range": [
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],
"source": "REFERENCES_TAG",
"original_tag": "v8.0.12"
}
]
}
}
],
"versions": [
"v8.0.11",
"v7.4.11",
"v7.4.0-BETA1",
"v8.0.9",
"v7.4.9",
"v8.0.8",
"v7.4.8",
"v8.0.6",
"v7.4.6",
"v8.0.4",
"v7.4.4",
"v8.0.3",
"v7.4.3",
"v8.0.1",
"v7.4.1",
"v7.4.0",
"v8.0.0",
"v7.4.0-RC2",
"v7.4.0-RC1",
"v7.3.0",
"v7.3.0-RC1",
"v7.3.0-BETA2",
"v7.3.0-BETA1",
"v7.2.1",
"v7.2.0-RC1",
"v7.2.0",
"v7.2.0-BETA2",
"v7.2.0-BETA1",
"v7.1.0-RC1",
"v7.1.0",
"v8.0.10",
"v8.0.7",
"v8.0.5",
"v8.0.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45074.json"
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}
],
"modified": "2026-10-28T02:30:25.512917091Z",
"provider": "osv",
"references": [
"https://github.com/symfony/symfony/releases/tag/v7.4.12",
"https://github.com/symfony/symfony/releases/tag/v8.0.12",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45074.json",
"https://github.com/symfony/symfony/security/advisories/GHSA-j8gj-9rm5-4xhx",
"https://nvd.nist.gov/vuln/detail/CVE-2026-45074",
"https://github.com/symfony/symfony/commit/5ba145dba702404801bdf9e7e8d6df170060d541"
],
"provider_metadata": {
"cwe_ids": [
"CWE-290"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45074.json"
}
},
"related_cves": [
{
"value": "CVE-2026-45074",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 492176,
"published_at": "2026-07-14T17:49:24.895+00:00"
}