{"id":"CVE-2026-101043","state":"PUBLISHED","title":"pnpm 11.0.0 before 11.11.0 Environment Variable Exfiltration via Proxy Settings","description":"pnpm versions 11.0.0 before 11.11.0 and 10.7.0 before 10.34.5 expand ${VAR} environment-variable placeholders in the httpProxy, httpsProxy, and noProxy settings read from a project's pnpm-workspace.yaml. Because the manifest is repository-controlled and the proxy keys were omitted from the request-destination key set that otherwise suppresses placeholder expansion for untrusted manifests (as already done for registry, pnprServer, registries and namedRegistries), an attacker who controls a repository's pnpm-workspace.yaml can cause a victim who clones the repository and runs a pnpm command (e.g. pnpm install) to expand environment secrets such as NPM_TOKEN or GITHUB_TOKEN into a proxy hostname or userinfo and route install traffic — and the corresponding DNS lookups — through an attacker-controlled host. The exfiltration occurs during configuration loading, before any lifecycle script executes. Fixed in pnpm 11.11.0 and 10.34.5.","publishedAt":"2026-09-27T17:02:33.119Z","updatedAt":"2026-09-30T15:47:12.588Z","severity":{"score":8.3,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["pnpm pnpm"],"affected":[{"vendor":"pnpm","product":"pnpm","packageURL":"pkg:npm/pnpm","defaultStatus":"unaffected","versions":[{"version":"11.0.0","status":"affected","lessThan":"11.11.0","versionType":"semver"},{"version":"11.11.0","status":"unaffected","versionType":"semver"}]},{"vendor":"pnpm","product":"pnpm","packageURL":"pkg:npm/pnpm","defaultStatus":"unaffected","versions":[{"version":"10.7.0","status":"affected","lessThan":"10.34.5","versionType":"semver"},{"version":"10.34.5","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/pnpm/pnpm/security/advisories/GHSA-vx52-2968-3vc6","https://www.vulncheck.com/advisories/pnpm-11.0.0-before-11.11.0-environment-variable-exfiltration-via-proxy-settings"],"weaknesses":["CWE-201"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/101xxx/CVE-2026-101043.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-101043","state":"PUBLISHED","datePublished":"2026-09-27T17:02:33.119Z","dateUpdated":"2026-09-30T15:47:12.588Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-27T15:48:49.472Z"},"containers":{"cna":{"title":"pnpm 11.0.0 before 11.11.0 Environment Variable Exfiltration via Proxy Settings","descriptions":[{"lang":"en","value":"pnpm versions 11.0.0 before 11.11.0 and 10.7.0 before 10.34.5 expand ${VAR} environment-variable placeholders in the httpProxy, httpsProxy, and noProxy settings read from a project's pnpm-workspace.yaml. Because the manifest is repository-controlled and the proxy keys were omitted from the request-destination key set that otherwise suppresses placeholder expansion for untrusted manifests (as already done for registry, pnprServer, registries and namedRegistries), an attacker who controls a repository's pnpm-workspace.yaml can cause a victim who clones the repository and runs a pnpm command (e.g. pnpm install) to expand environment secrets such as NPM_TOKEN or GITHUB_TOKEN into a proxy hostname or userinfo and route install traffic — and the corresponding DNS lookups — through an attacker-controlled host. The exfiltration occurs during configuration loading, before any lifecycle script executes. Fixed in pnpm 11.11.0 and 10.34.5."}],"affected":[{"vendor":"pnpm","product":"pnpm","packageURL":"pkg:npm/pnpm","defaultStatus":"unaffected","versions":[{"version":"11.0.0","status":"affected","lessThan":"11.11.0","versionType":"semver"},{"version":"11.11.0","status":"unaffected","versionType":"semver"}]},{"vendor":"pnpm","product":"pnpm","packageURL":"pkg:npm/pnpm","defaultStatus":"unaffected","versions":[{"version":"10.7.0","status":"affected","lessThan":"10.34.5","versionType":"semver"},{"version":"10.34.5","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-vx52-2968-3vc6","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-vx52-2968-3vc6)"},{"url":"https://www.vulncheck.com/advisories/pnpm-11.0.0-before-11.11.0-environment-variable-exfiltration-via-proxy-settings","name":"VulnCheck Advisory: pnpm 11.0.0 before 11.11.0 Environment Variable Exfiltration via Proxy Settings","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.3,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":7.4,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-201","lang":"en","description":"Insertion of Sensitive Information Into Sent Data","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-27T17:02:33.119Z"},"datePublic":"2026-08-03T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:*:*:*","versionStartIncluding":"11.0.0","versionEndExcluding":"11.11.0"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:*:*:*","versionStartIncluding":"10.7.0","versionEndExcluding":"10.34.5"}]}]}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/pnpm/pnpm/security/advisories/GHSA-vx52-2968-3vc6","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-30T15:47:05.650499Z","id":"CVE-2026-101043","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-30T15:47:12.588Z"}}]}}}