CVE-2026-55698Public exploitNetwork attack vector

Code execution via reused committed lockfile metadata

Published Jun 25, 2026 · Updated Jun 25, 2026

Code execution in pnpm before 10.34.2 and 11.0.0 through 11.5.2 allows remote attackers to run code via a malicious repository. The switchCliVersion path accepts version-matching packageManagerDependencies, packages, and snapshots from the committed env lockfile without fresh trusted-registry resolution, then installs and spawns the selected binary. Exploitation requires a victim to invoke pnpm directly in the repository during automatic version switching, after which code runs with that user's privileges.

CVSS severity8.8
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in pnpm before 10.34.2 and 11.0.0 through 11.5.2 allows remote attackers to run code via a malicious repository. The switchCliVersion path accepts version-matching packageManagerDependencies, packages, and snapshots from the committed env lockfile without fresh trusted-registry resolution, then installs and spawns the selected binary. Exploitation requires a victim to invoke pnpm directly in the repository during automatic version switching, after which code runs with that user's privileges.

The record

CVE
CVE-2026-55698
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
pnpm
Product
pnpm
Classifications
CWE-829, CWE-345, CWE-494, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record 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=< 10.34.2
  2. Affected versionversion=>= 11.0.0, < 11.5.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pnpm · pnpmversion=< 10.34.2; version=>= 11.0.0, < 11.5.3

Published CVSS scores

8.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-829Inclusion of Functionality from Untrusted Control Sphere
CWE-345Insufficient Verification of Data Authenticity
CWE-494Download of Code Without Integrity Check
T1204.002User Execution: Malicious File

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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