What is CVE-2026-55487?

CVE-2026-55487 is a high-severity vulnerability in Pnpm, classified under Origin Validation Error. CVSS score: 7.5/10. Published 2026-06-25.

How severe is CVE-2026-55487?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Pnpm

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…

EPSS: 0.002 (5.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Pnpm — versions < 10.34.2, >= 11.0.0, < 11.5.3

Weakness classification (CWE)

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

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-55487?: CVE-2026-55487 is a high-severity vulnerability in Pnpm, classified under Origin Validation Error. CVSS score: 7.5/10. Published 2026-06-25.
How severe is CVE-2026-55487?: High severity. CVSS v3 base score is 7.5 out of 10.