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CVE-2026-55487— pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle

Quick assessment

Affected
pnpm pnpm
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pnpm是pnpm团队开源的一个包管理器。 pnpm 10.34.2之前版本和11.5.3之前版本存在安全漏洞，该漏洞源于generic peer-suffix normalizer也从git、URL、tarball、file和其他不透明定位器中移除了括号文本，可能导致对某一源字符串的批准授权给另一个攻击者控制的源，其定位器规范化后具有相同值。

CVSS 7.5 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1195 · Supply Chain Compromise

Affected Version Matrix 2

VendorProduct Version RangeStatus
pnpm pnpm < 10.34.2 affected
>= 11.0.0, < 11.5.3 affected
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I. Basic Information for CVE-2026-55487

Vulnerability Information
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Vulnerability Title
pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
pnpm 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pnpm是pnpm团队开源的一个包管理器。 pnpm 10.34.2之前版本和11.5.3之前版本存在安全漏洞，该漏洞源于generic peer-suffix normalizer也从git、URL、tarball、file和其他不透明定位器中移除了括号文本，可能导致对某一源字符串的批准授权给另一个攻击者控制的源，其定位器规范化后具有相同值。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
pnpm pnpm < 10.34.2 -

II. Public POCs for CVE-2026-55487

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III. Intelligence Information for CVE-2026-55487

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Vendor Advisories for CVE-2026-55487 (1)

Same Patch Batch · pnpm · 2026-06-25 · 13 CVEs total

CVE-2026-50016 8.8 HIGH pnpm: Transitive dependency alias path traversal allows project path override via symlink
CVE-2026-55698 8.8 HIGH pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfi
CVE-2026-55697 7.5 HIGH pnpm: Repository-controlled configDependencies can select a pacquet native install engine
CVE-2026-50015 7.3 HIGH pnpm: Arbitrary File Write/Delete via Malicious Patch File (Path Traversal)
CVE-2026-55700 7.1 HIGH pnpm: stage download writes outside destination via manifest version traversal
CVE-2026-50021 6.8 MEDIUM pnpm: Integrity Check Bypass via Missing Lockfile Integrity Field
CVE-2026-50573 6.8 MEDIUM pnpm: Unsafe default behavior breaks integrity check
CVE-2026-55180 6.5 MEDIUM pnpm: Repository config can expand victim environment secrets into registry requests befor
CVE-2026-55699 6.5 MEDIUM pnpm: reserved bin name deletes PNPM_HOME during global remove
CVE-2026-50014 6.4 MEDIUM pnpm: Git Fetch Argument Injection via Lockfile resolution.commit
CVE-2026-48995 pnpm: Tarball hash of GitHub git dependencies is not stored in lockfile
CVE-2026-50017 pnpm binds unscoped user-level npm auth credentials to a repository-selected registry

IV. Related Vulnerabilities

Same product: pnpm
Same vendor: pnpm
Same weakness: CWE-346

V. Comments for CVE-2026-55487

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