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    CVE-2026-55487

    pnpm is a package manager. Prior to 10.34.2 and 11.5.3, the generic peer-suffix normalizer also stripped parenthesized text from git, URL, tarball, file, and other opaque locators. Approval for one source string could therefore authorize a different attacker-controlled source whose locator normalized to the same value. This vulnerability is fixed in 10.34.2 and 11.5.3.

    Published:Jun 25, 2026
    Last Modified:Jun 25, 2026
    EPS:Jun 25, 2026
    EPSS Score:
    CVSS Score:7.5

    Affected Products

    Vendor
    Pnpm
    Product
    Pnpm

    Exploits

    https://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57rhttps://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57r

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs
    CAPEC-107 Cross Site Tracing
    CAPEC-111 JSON Hijacking (aka JavaScript Hijacking)
    CAPEC-127 Directory Indexing
    CAPEC-141 Cache Poisoning
    CAPEC-142 DNS Cache Poisoning
    CAPEC-160 Exploit Script-Based APIs
    CAPEC-17 Using Malicious Files
    CAPEC-175 Code Inclusion
    CAPEC-20 Encryption Brute Forcing
    CAPEC-201 Serialized Data External Linking
    CAPEC-21 Exploitation of Trusted Identifiers
    CAPEC-22 Exploiting Trust in Client
    CAPEC-228 DTD Injection
    CAPEC-237 Escaping a Sandbox by Calling Code in Another Language
    CAPEC-251 Local Code Inclusion
    CAPEC-252 PHP Local File Inclusion
    CAPEC-253 Remote Code Inclusion
    CAPEC-263 Force Use of Corrupted Files
    CAPEC-36 Using Unpublished Interfaces or Functionality
    CAPEC-384 Application API Message Manipulation via Man-in-the-Middle
    CAPEC-385 Transaction or Event Tampering via Application API Manipulation
    CAPEC-386 Application API Navigation Remapping
    CAPEC-387 Navigation Remapping To Propagate Malicious Content
    CAPEC-388 Application API Button Hijacking
    CAPEC-477 Signature Spoofing by Mixing Signed and Unsigned Content
    CAPEC-480 Escaping Virtualization
    CAPEC-51 Poison Web Service Registry
    CAPEC-510 SaaS User Request Forgery
    CAPEC-538 Open-Source Library Manipulation
    CAPEC-549 Local Execution of Code
    CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
    CAPEC-59 Session Credential Falsification through Prediction
    CAPEC-60 Reusing Session IDs (aka Session Replay)
    CAPEC-640 Inclusion of Code in Existing Process
    CAPEC-65 Sniff Application Code
    CAPEC-660 Root/Jailbreak Detection Evasion via Hooking
    CAPEC-668 Key Negotiation of Bluetooth Attack (KNOB)
    CAPEC-695 Repo Jacking
    CAPEC-698 Install Malicious Extension
    CAPEC-74 Manipulating State
    CAPEC-75 Manipulating Writeable Configuration Files
    CAPEC-76 Manipulating Web Input to File System Calls
    CAPEC-87 Forceful Browsing
    CAPEC-89 Pharming

    Related CVEs

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    CVE-2026-59196 (CVSS 7.1) — pnpm is a package manager. Prior to 10.34.4 and 11.7.0, a crafted lockfile alias could be joined directly unde…
    CVE-2026-59194 (CVSS 7.1) — pnpm is a package manager. Prior to 10.34.4 and 11.7.0, a crafted patch entry could resolve outside the config…
    CVE-2026-55180 (CVSS 6.5) — pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm and pacquet expanded ${ENV_VAR} placeholders from…
    CVE-2026-48995 (CVSS 4.8) — pnpm is a package manager. Prior to 10.33.4 and 11.0.7, a malicious codeload.github.com server can serve whate…
    CVE-2026-50017 (CVSS 6.9) — pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm can send user-level unscoped npm authentication c…
    CVE-2026-50016 (CVSS 8.8) — pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm allows a transitive dependency alias from registr…
    CVE-2026-50015 (CVSS 7.3) — pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm's patch application pipeline (@pnpm/patch-package…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High