Symfony: Argument Injection in SendmailTransport via Dash-Prefixed Recipient Address

Summary

CVE	CVE-2026-45068
State	PUBLISHED
Assigner	GitHub_M
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-07-14 20:17:00 UTC
Updated	2026-07-15 14:18:10 UTC
Description	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, SendmailTransport in -t mode appended recipient addresses to the sendmail command line without a -- end-of-options separator, allowing an address beginning with - to be interpreted as a sendmail command-line option instead of an address. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

Risk And Classification

Primary CVSS: v4.0 8.7 HIGH from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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

EPSS: 0.004610000 probability, percentile 0.370560000 (date 2026-07-15)

Problem Types: CWE-88 | CWE-88 CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

Version	Source	Type	Score	Severity	Vector
4.0	[email protected]	Secondary	8.7	HIGH	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/C...`
4.0	CNA	DECLARED	8.7	HIGH	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N`
3.1	[email protected]	Primary	7.5	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`

CVSS v4.0 Breakdown

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

None

Privileges Required

None

User Interaction

None

Confidentiality

None

Integrity

High

Availability

None

Sub Conf.

None

Sub Integrity

None

Sub Availability

None

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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

CVSS v3.1 Breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Application	Sensiolabs	Symfony	All	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Symfony	Symfony	affected < 5.4.52	Not specified
CNA	Symfony	Symfony	affected >= 6.0.0-BETA1, < 6.4.40	Not specified
CNA	Symfony	Symfony	affected >= 7.0.0-BETA1, < 7.4.12	Not specified
CNA	Symfony	Symfony	affected >= 8.0.0-BETA1, < 8.0.12	Not specified
CNA	Symfony	Mailer	affected < 5.4.52	Not specified
CNA	Symfony	Mailer	affected >= 6.0.0-BETA1, < 6.4.40	Not specified
CNA	Symfony	Mailer	affected >= 7.0.0-BETA1, < 7.4.12	Not specified
CNA	Symfony	Mailer	affected >= 8.0.0-BETA1, < 8.0.12	Not specified

References

Reference	Source	Link	Tags
github.com/symfony/symfony/releases/tag/v5.4.52	[email protected]	github.com	Product, Release Notes
github.com/symfony/symfony/commit/c45144862dc289d03952f41f6078174089a3afc6	[email protected]	github.com	Patch
github.com/symfony/symfony/releases/tag/v6.4.40	[email protected]	github.com	Product, Release Notes
github.com/symfony/symfony/security/advisories/GHSA-xx3c-qf5g-hc39	[email protected]	github.com	Patch, Vendor Advisory
github.com/symfony/symfony/releases/tag/v8.0.12	[email protected]	github.com	Product, Release Notes
github.com/symfony/symfony/releases/tag/v7.4.12	[email protected]	github.com	Product, Release Notes
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

No vendor comments have been submitted for this CVE.

There are currently no legacy QID mappings associated with this CVE.