Medium
Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names
Type: advisorySources: OSV
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Mime\Header\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derives a parameter name from untrusted input to include CRLF or other non-token bytes and inject additional headers into rendered structured mail headers such as Content-Type or Content-Disposition. This issue is reported as fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-45070
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 17:25 UTC · Revision 1
Source evidence
Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names
core-osv · Original sourcePublished 14 Jul 2026, 18:25 UTC
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\Component\Mime\Header\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derives a parameter name from untrusted input to include CRLF or other non-token bytes and inject additional headers into rendered structured mail headers such as Content-Type or Content-Disposition. This issue is reported as fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
osv:CVE-2026-45070
Complete source record
{
"id": "e12fa24405e44e611ff92cfed359c8f4203a425acea9b0050745cf29fd935ca2",
"url": "https://osv.dev/vulnerability/CVE-2026-45070",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Symfony: Email Header Injection via Non-Token Characters in Mime Parameter Names",
"summary": "Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, Symfony\\Component\\Mime\\Header\\ParameterizedHeader validates and encodes parameter values but emits parameter names verbatim, allowing a caller that derives a parameter name from untrusted input to include CRLF or other non-token bytes and inject additional headers into rendered structured mail headers such as Content-Type or Content-Disposition. This issue is reported as fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.",
"evidence": "osv:CVE-2026-45070",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-45070",
"aliases": [
"CVE-2026-45070",
"GHSA-vqc8-7275-q272"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
}
],
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"modified": "2026-10-28T02:30:44.620102562Z",
"provider": "osv",
"references": [
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],
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},
"source_id": "core-osv",
"document_id": 512535,
"published_at": "2026-07-14T18:25:46.647+00:00"
}