PT-2026-44137 · Symfony · Symfony/Mailer

Published 2026-05-21 · Updated 2026-05-27 · CVE-2026-45068

Positive Technologies (AI Summary)

CVSS v4.0

6.2

Medium

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

Name of the Vulnerable Software and Affected Versions Symfony Mailer (affected versions not specified)

Description When using SendmailTransport in -t mode, recipient addresses are appended to the sendmail command line without a -- end-of-options separator. Because SymfonyComponentMimeAddress accepts addresses starting with a hyphen, a recipient address beginning with - can be interpreted by the sendmail binary as a command-line option instead of an email address. This occurs when the transport is configured via the MAILER DSN environment variable.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Argument Injection

Weakness Enumeration

CWE-88

Related Identifiers

CVE-2026-45068

GHSA-XX3C-QF5G-HC39

Affected Products

Symfony/Mailer

References · 13

• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mailer/CVE-2026-45068.yaml · Exploit
• 🔥 https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45068.yaml · Exploit
• https://osv.dev/vulnerability/GHSA-xx3c-qf5g-hc39 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-45068 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45068 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45068 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-45068 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-45068 · Vendor Advisory
• https://github.com/symfony/symfony/commit/c45144862dc289d03952f41f6078174089a3afc6 · Note
• https://github.com/symfony/symfony/security/advisories/GHSA-xx3c-qf5g-hc39 · Note
• https://github.com/symfony/symfony · Note
• https://symfony.com/blog/cve-2026-45068-argument-injection-in-sendmailtransport-via-dash-prefixed-recipient-address · Note
• https://symfony.com/cve-2026-45068 · Note