CVE-2026-55487 | BDVDB-2026-343344 Detail

pnpmpnpm

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-346 Origin Validation Error
CWE-693 Protection Mechanism Failure
CWE-829 Inclusion of Functionality from Untrusted Control Sphere

References#

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

Exploit#

No public exploit known

History#

Version 12026-06-25Record published in the CVE List.

Published

Published: 2026-06-25
Last modified: 2026-06-25

Vendor information

Vendor: pnpm
Product: pnpm

All pnpm vulnerabilities

Score

7.5 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 7.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 10.34.2
Fixed
Not stated
Vulnerable
>= 11.0.0, < 11.5.3
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.5 High

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).