CVE-2024-53866Public exploitNetwork attack vector

Code execution via shared metadata cache poisoning

Published Dec 10, 2024 · Updated Dec 31, 2025

Cache isolation failure in pnpm before 9.15.0 allows attackers to execute arbitrary code during a later dependency installation. The resolver writes workspace-specific override results into shared npm metadata, and later installs trust that cached metadata without revalidation even when the poisoning install used ignore-scripts. Execution requires a user or automation job to install attacker-controlled dependencies in one workspace and later run an install in another workspace sharing the cache.

CVSS severity5.8
Medium
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cache isolation failure in pnpm before 9.15.0 allows attackers to execute arbitrary code during a later dependency installation. The resolver writes workspace-specific override results into shared npm metadata, and later installs trust that cached metadata without revalidation even when the poisoning install used ignore-scripts. Execution requires a user or automation job to install attacker-controlled dependencies in one workspace and later run an install in another workspace sharing the cache.

The record

CVE
CVE-2024-53866
Published
Dec 10, 2024
Updated
Dec 31, 2025
Vendor
pnpm
Product
pnpm
Classifications
CWE-426, CWE-346, T1059
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 9.15.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pnpm · pnpmversion=< 9.15.0

Published CVSS scores

5.8GitHubCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-426Untrusted Search Path
CWE-346Origin Validation Error
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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