CVE-2026-82393

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
50(Track*)
EG Risk 50/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 1, 2026

Advisory Details (7)

Auto-updated Aug 31, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

pnpm 11.11

Patch available: pnpm/pnpm v11.11.0

https://github.com/pnpm/pnpm/releases/tag/v11.11.0
github_release Patch Available

pnpm 10.34.5

Patch available: pnpm/pnpm v10.34.5

https://github.com/pnpm/pnpm/releases/tag/v10.34.5
github_commit

commit 78e29fe5583a (pnpm/pnpm)

Fix landed in pnpm/pnpm commit 78e29fe5583a — awaiting tagged release

https://github.com/pnpm/pnpm/commit/78e29fe5583a1e5d69ea05e414eff310f78d5ed9
github_commit

commit 51300fd41c5e (pnpm/pnpm)

Fix landed in pnpm/pnpm commit 51300fd41c5e — awaiting tagged release

https://github.com/pnpm/pnpm/commit/51300fd41c5e4c8f47635108e373cc3d1f324fa7
github_pr

fix(security): backport lockfile & manifest name/slot containment to v10

Fix merged in pnpm/pnpm PR #12890 on 2026-07-09 — awaiting tagged release

https://github.com/pnpm/pnpm/pull/12890
github_pr

fix(security): contain lockfile & manifest package names/slots against path traversal (pnpm + pacquet)

Fix merged in pnpm/pnpm PR #12872 on 2026-07-09 — awaiting tagged release

https://github.com/pnpm/pnpm/pull/12872
github Patch Available🟡 PoC Available

pnpm: A tarball dependency's manifest `name` escapes node_modules → arbitrary file write/overwrite on install · Advisory · pnpm/pnpm · GitHub

https://github.com/pnpm/pnpm/security/advisories/GHSA-vq4v-j7r6-jq4m

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-01 15:41 UTCEG score recompute
  2. 2026-09-01 14:34 UTCEG score recompute
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-08-31 22:21 UTCEG score recompute
  5. 2026-08-31 21:25 UTCEG score recompute
  6. 2026-08-31 21:24 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-82393?
CVE-2026-82393 is a high vulnerability published on August 31, 2026. 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…
When was CVE-2026-82393 disclosed?
CVE-2026-82393 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82393 actively exploited?
CVE-2026-82393 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.6% of all scored CVEs.
What is the CVSS score of CVE-2026-82393?
CVE-2026-82393 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-82393?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82393, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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