Bug 2493035 (CVE-2026-55487)

Summary: CVE-2026-55487 pnpm: pnpm: Supply chain compromise via manipulated package source strings
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: anujha, aschwart, asoldano, aszczucz, ataylor, bbaranow, bmaxwell, boliveir, bstansbe, dbruscin, dlofthou, drichtar, ehugonne, istudens, ivassile, iweiss, kvanderr, mosmerov, mposolda, msvehla, nwallace, pberan, pesilva, pjindal, pmackay, rmartinc, rstancel, ssilvert, sthorger, thjenkin, vdosoudi, vmuzikar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in pnpm, a package manager. This vulnerability allows a remote attacker to bypass security checks by manipulating how package source strings are processed. By crafting a specially designed source string, an attacker could trick the system into approving and using a malicious package instead of the intended one. This could lead to the execution of unauthorized code or the installation of harmful software, severely impacting the confidentiality, integrity, and availability of the system.
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Description OSIDB Bzimport 2026-06-25 18:02:54 UTC
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.