CVE-2026-27206: Zumba Json Serializer has a potential PHP Object Injection via Unrestricted @type in unserialize()

high Affects zumba/json-serializer. Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

Zumba Json Serializer has a potential PHP Object Injection via Unrestricted @type in unserialize()

Package
zumba/json-serializer Composer
Affected versions
<3.2.3
Fixed in
3.2.3
Severity
high  CVSS 8.1
Exploitation
not on CISA KEV · EPSS 1% (57.5th percentile)
Published
2026-02-19
Source
osv.dev

References

CWE-502
NVD recordzumba/json-serializer 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

Install docs   How findings are ranked

Related advisories