NVD / CVE Program· CNA GitHub_M

CVE-2026-82393: pnpm: A tarball dependency's manifest `name` escapes node_modules → arbitrary file write/overwrite on install

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.62% (FIRST EPSS); higher than 50.4% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
Fixed version: pnpm (npm) 11.11.0, 10.34.5.

Low priority for now. Upgrade to pnpm (npm) 11.11.0, 10.34.5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published: Aug 31, 2026
Updated: Nov 3, 2026
EPSS: 0.6% · 50th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.6%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 7.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

pnpm pnpm
- < 10.34.5, >= 11.0.0, < 11.11.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
npm	pnpm	from 11.0.0 · before 11.11.0	11.11.0
npm	pnpm	before 10.34.5	10.34.5

Same product

pnpm: all records

Other highest-scoring records for the same primary product.

CVE-2025-69264pnpm v10+ Bypass "Dependency lifecycle scripts execution disabled by default"
39Monitor
CVE-2023-37478pnpm incorrectly parses tar archives relative to specification
39Monitor
CVE-2026-55698pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes
35Monitor

Published before and after this one in the same product

← EarlierCVE-2026-59196Jul 6, 2026 · pnpm: hoisted install imports lockfile alias outside node_modules
28Monitor
← EarlierCVE-2026-82392Aug 31, 2026 · pnpm: Virtual store linker path traversal via unvalidated depPath name in lockfileToDepGraph
28Monitor
Later →CVE-2026-101043Sep 27, 2026 · pnpm 11.0.0 before 11.11.0 Environment Variable Exfiltration via Proxy Settings
33Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
npm:pnpm	10.34.5	Package registry (OSV)
npm:pnpm	11.11.0	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-5919556 days apartpnpm: Path traversal in configDependencies env lockfile allows symlink creation outside node_modules/.pnpm-config
32Monitor
CVE-2026-5001567 days apartpnpm: Arbitrary File Write/Delete via Malicious Patch File (Path Traversal)
29Monitor
CVE-2026-823920 days apartpnpm: Virtual store linker path traversal via unvalidated depPath name in lockfileToDepGraph
28Monitor
CVE-2026-10104427 days apartpacquet before 12.0.0-alpha.5 Path Traversal via lockfile alias
28Monitor
CVE-2026-5919456 days apartpnpm: patch-remove could delete project-selected files outside the patches directory
28Monitor
CVE-2026-5919656 days apartpnpm: hoisted install imports lockfile alias outside node_modules
28Monitor

Not on record for this CVE: researcher credit · public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
A user must open a link or visit a page.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

nvd-secondary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

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Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/pnpm/pnpm/commit/51300fd41c5e4c8f47635108e373cc3d1f324fa7

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records