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 different attacker-controlled source whose locator normalized to the same value. This vulnerability is fixed in 10.34.2 and 11.5.3.

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.002 (6.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-55487: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

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

Weakness classification (CWE)

References

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.