CVE-2026-55487: pnpm: Manifest identity spoof satisfies allowBuilds and runs attacker lifecycle

Summary Keep build approval for opaque dependency sources byte-exact for GHSA-5wx6-mg75-v57r / CAND-PNPM-123. Merged upstream commit bf1b731ee6 fixed the original name-only approval bypass by making build policy consume…

7.5CVSS Score

HIGHSeverity

NOCISA KEV

VulnerabilityImpact Type

📋 Vulnerability Details

CVE ID	CVE-2026-55487
Vendor	npm
Affected Product	pnpm
Vulnerability Type	Vulnerability
CVSS Score	7.5 (HIGH)
Actively Exploited	❌ No known exploitation
Patch Status	See Vendor Advisory →
Reported By	CYBERDUDEBIVASH SENTINEL APEX Intelligence (via github_advisories)

🔬 Technical Analysis

Summary Keep build approval for opaque dependency sources byte-exact for GHSA-5wx6-mg75-v57r / CAND-PNPM-123. Merged upstream commit `bf1b731ee6` fixed the original name-only approval bypass by making build policy consume the resolved dependency identity. One collision remained: 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.

Security boundary - Registry dependency identities still normalize legitimate peer suffixes and retain patch hashes.

• Git, URL, tarball, file, directory, and otherwise opaque identities must match the complete resolved locator byte for byte.

• Expl

📚 Advisory References

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