Bug 2526818 (CVE-2026-82393)

Summary:	CVE-2026-82393 pnpm: pnpm: Arbitrary file write and code execution via path traversal in tarball dependency manifest
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	anujha, aschwart, asoldano, aszczucz, ataylor, bbaranow, bmaxwell, boliveir, bstansbe, csuconic, dbruscin, dlofthou, drichtar, ehugonne, gbenhaim, gtully, istudens, ivassile, iweiss, jsherman, kvanderr, mosmerov, mposolda, msvehla, niyer, nwallace, pberan, pesilva, pjindal, pmackay, rgemmell, rgodfrey, rmartinc, rstancel, ssilvert, sthorger, tbish, thjenkin, tlavocat, twaugh, vdosoudi, vmuzikar
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in pnpm. This vulnerability allows a remote attacker to perform a path traversal by crafting a malicious tarball dependency's manifest name. During package installation, pnpm fails to properly validate the manifest name, leading to files being extracted outside the intended `node_modules` directory. This can result in attacker-controlled files overwriting arbitrary filesystem paths, potentially leading to arbitrary code execution on the affected system.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-01 14:46:13 UTC

pnpm is a package manager. Prior to 10.34.5 and 11.11.0, pnpm accepts a scoped path traversal in a tarball dependency's package.json manifest name because pnpm11/resolving/npm-resolver/src/pickPackage.ts rejects slash characters only for unscoped names. During pnpm install, the unvalidated name reaches raw path joins in pnpm11/installing/deps-resolver/src/resolvePeers.ts, pnpm11/installing/deps-resolver/src/index.ts, and pnpm11/deps/graph-builder/src/lockfileToDepGraph.ts, causing package extraction outside node_modules and allowing attacker-controlled files to overwrite arbitrary filesystem paths even when --ignore-scripts is used. The overwrite can replace shell startup files, Git hooks, or installed package code and lead to code execution. This issue is fixed in versions 10.34.5, and 11.11.0.