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2014-12-29-1: Header injection in NativeMailerHandler

unknown Affects monolog/monolog. Feed 2026.10.29.1, updated 2026-10-28.

Header injection in NativeMailerHandler

Package
monolog/monolog Composer
Affected versions
>=1.8.0 and <1.12.0
Fixed in
1.12.0
Severity
unknown
Exploitation
not on CISA KEV
Source
friendsofphp

References

NVD recordmonolog/monolog advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

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