high7.5
CVE-2026-55487
pnpm: Manifest identity spoof satisfies allowBuilds and runs attacker lifecycle
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | pnpm | < 10.34.2 | 10.34.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Pnpm | Pnpm | before 10.34.2 from 11.0.0 before 11.5.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-5wx6-mg75-v57r
- https://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57r
- https://nvd.nist.gov/vuln/detail/CVE-2026-55487
- https://github.com/pnpm/pnpm/commit/bf1b731ee6c0ea98709e671ff0f46bf654480ab8
- https://github.com/pnpm/pnpm/releases/tag/v10.34.2
- https://github.com/pnpm/pnpm/releases/tag/v11.5.3