2018-07-12-4: Insecure Deserialization in TYPO3 CMS

unknown Affects typo3/cms, typo3/cms-core. Feed 2026.10.29.4, updated 2026-10-29.

Insecure Deserialization in TYPO3 CMS

Package
typo3/cms Composer
Affected versions
>=8.5.0 and <8.7.17 or >=9.0.0 and <9.3.2
Fixed in
8.7.17, 9.3.2
Severity
unknown
Exploitation
not on CISA KEV
Source
friendsofphp

References

Insecure Deserialization in TYPO3 CMS

Package
typo3/cms-core Composer
Affected versions
>=8.5.0 and <8.7.17 or >=9.0.0 and <9.3.2
Fixed in
8.7.17, 9.3.2
Severity
unknown
Exploitation
not on CISA KEV
Source
friendsofphp

References

NVD recordtypo3/cms advisoriestypo3/cms-core 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

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