CVE-2026-48995Public exploitNetwork attack vector

Arbitrary dependency installation via unhashed GitHub tarballs

Published Jun 25, 2026 · Updated Jun 25, 2026

Integrity-check bypass in pnpm before 10.33.4 and 11.0.0 through 11.0.6 allows attackers to install substituted GitHub tarballs. Git dependency resolution records a codeload.github.com tarball URL and commit label in pnpm-lock.yaml without a content hash, then accepts the downloaded archive without lockfile integrity validation. Exploitation requires a project using GitHub Git dependencies, a compromised codeload server or local name-resolution configuration, and a subsequent dependency installation.

CVSS severity7.5
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integrity-check bypass in pnpm before 10.33.4 and 11.0.0 through 11.0.6 allows attackers to install substituted GitHub tarballs. Git dependency resolution records a codeload.github.com tarball URL and commit label in pnpm-lock.yaml without a content hash, then accepts the downloaded archive without lockfile integrity validation. Exploitation requires a project using GitHub Git dependencies, a compromised codeload server or local name-resolution configuration, and a subsequent dependency installation.

The record

CVE
CVE-2026-48995
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
pnpm
Product
pnpm
Classifications
CWE-353, T1195.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 10.33.4
  2. Affected versionversion=>= 11.0.0, < 11.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pnpm · pnpmversion=< 10.33.4; version=>= 11.0.0, < 11.0.7

Published CVSS scores

4.8GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U
7.5NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-353Missing Support for Integrity Check
T1195.001Compromise Software Dependencies and Development Tools

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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