CVE-2023-41330: Snappy PHAR deserialization vulnerability

critical Affects knplabs/knp-snappy. Feed 2026.10.29.1, updated 2026-10-28; published ; advisory modified .

Snappy PHAR deserialization vulnerability

Package
knplabs/knp-snappy Composer
Affected versions
<1.4.3
Fixed in
1.4.3
Severity
critical  CVSS 9.8
Exploitation
not on CISA KEV · EPSS 2% (83.1th percentile)
Published
2023-09-08
Source
osv.dev

References

CWE-502
NVD recordknplabs/knp-snappy 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.

# one-time install
pip install phpwarden

# then
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