CVE-2026-55487
Approval for one source string could therefore authorize a different attacker-controlled source whose locator normalized to the same value.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-346, CWE-693, CWE-829
- Affected
- pnpm/pnpm
- Source
- security-advisories@github.com
References
- https://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57rExploit, Vendor Advisory
- https://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57rExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.