CVE-2025-69263Public exploitNetwork attack vector

Supply-chain code substitution via unhashed tarballs

Published Jan 7, 2026 · Updated Jan 7, 2026

Integrity bypass in pnpm before 10.26.0 allows remote attackers to substitute dependency code through HTTP or Git tarball installs. The tarball resolver records only the resolved URL in pnpm-lock.yaml and omits an integrity hash, so later installs accept changed bytes from that URL. Exploitation requires installation of a package whose dependency tree contains an HTTP or Git tarball, enabling targeted or time-varying code delivery.

CVSS severity7.5
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integrity bypass in pnpm before 10.26.0 allows remote attackers to substitute dependency code through HTTP or Git tarball installs. The tarball resolver records only the resolved URL in pnpm-lock.yaml and omits an integrity hash, so later installs accept changed bytes from that URL. Exploitation requires installation of a package whose dependency tree contains an HTTP or Git tarball, enabling targeted or time-varying code delivery.

The record

CVE
CVE-2025-69263
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
pnpm
Product
pnpm
Classifications
CWE-494, T1195.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 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=< 10.26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pnpm · pnpmversion=< 10.26.0

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
7.5Red Hat Security DataCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-494Download of Code Without Integrity Check
T1195.002Compromise Software Supply Chain

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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