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Not in CISA KEV
HIGH severity

CVE-2023-37473 — collection

HIGHFix: zenstruck/collection@f4b1c48

CVE-2023-37473 is a high-severity (CVSS 8.5) CWE-74 vulnerability in zenstruck/collection. A fix is available for zenstruck/collection — see the affected versions and patch details below.

Limited code execution in zenstruck/collections

Also known asGHSA-7xr2-8ff7-6fjq
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 5, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • A successful exploit gives an attacker total control of the affected component, not partial access.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-37473.

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs61th percentile — riskier than 61% of all scored CVEsHighest risk
0.00%0.48%0.96%1.44%0.2%0.9%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘zenstruck/collection

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

zenstruck/collections is a set of helpers for iterating/paginating/filtering collections. Passing callable strings (ie system) caused the function to be executed. This would result in a limited subset of specific user input being executed as if it were code. This issue has been addressed in commit f4b1c48820 and included in release version 0.2.1. Users are advised to upgrade. Users unable to upgrade should ensure that user input is not passed to either EntityRepository::find() or query().

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistzenstruck/collectionall versions0.2.1composer require zenstruck/collection:^0.2.1

Affected Products

1 product · 1 configurations
Application
collectionzenstruck
1 version
0.2.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zenstruck/collection, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update zenstruck/collection to 0.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-37473 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

zenstruck/collections is a set of helpers for iterating/paginating/filtering collections. Passing _callable strings_ (ie `system`) caused the function to be executed. This would result in a limited subset of specific user input being executed as if it were code. This issue has been addressed in commit `f4b1c48820` and included in release version 0.2.1. Users are advised to upgrade. Users unable to upgrade should ensure that user input is not passed to either `EntityRepository::find()` or `query()`.
O3 Security · Impact-Aware SCA

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CVE-2023-37473: collection — Fixed in 0.2.1