Versions of the package pacote from 11.2.7 and before 21.5.1 are vulnerable to Denial of Service (DoS) via the addGitSha function. An attacker can exploit this vulnerability by supplying a specially crafted spec.rawSpec value that triggers the function’s regex replacement and string-manipulation logic, causing excessive CPU consumption and potentially stalling or crashing the process.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00335.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a pacote affected
Version Status Constraints
11.2.7 affected < 21.5.1
n/a org.webjars.npm:pacote affected
Version Status Constraints
11.2.7 affected < *

No data.

No data.

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Vendors Products
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Pacote Subscribe

Project Subscriptions

Vendors Products
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Pacote Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/npm/pacote/blob/9d7459440826ab4cf962ef98d8f3fd0c4d464b5c/lib/util/add-git-sha.js%23L2C1-L13C2 cve-icon cve-icon
https://github.com/npm/pacote/commit/ce804fb1647fe1699b2f87efd01ea9f4efed8508 cve-icon
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-16874025 cve-icon cve-icon
https://security.snyk.io/vuln/SNYK-JS-PACOTE-8225084 cve-icon cve-icon cve-icon
History

Sat, 27 Jun 2026 16:45:00 +0000

Type Values Removed Values Added
Title Denial of Service via addGitSha in pacote due to malicious spec.rawSpec input

Sat, 27 Jun 2026 15:45:00 +0000

Type Values Removed Values Added
Description Versions of the package pacote from 11.2.7 are vulnerable to Denial of Service (DoS) via the addGitSha function. An attacker can exploit this vulnerability by supplying a specially crafted spec.rawSpec value that triggers the function’s regex replacement and string-manipulation logic, causing excessive CPU consumption and potentially stalling or crashing the process. Versions of the package pacote from 11.2.7 and before 21.5.1 are vulnerable to Denial of Service (DoS) via the addGitSha function. An attacker can exploit this vulnerability by supplying a specially crafted spec.rawSpec value that triggers the function’s regex replacement and string-manipulation logic, causing excessive CPU consumption and potentially stalling or crashing the process.
References

Wed, 27 May 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Npmjs
Npmjs pacote
Vendors & Products Npmjs
Npmjs pacote

Tue, 26 May 2026 16:15:00 +0000

Type Values Removed Values Added
Title Denial of Service via RegExp Replacement in pacote addGitSha Function

Tue, 26 May 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 26 May 2026 07:45:00 +0000

Type Values Removed Values Added
Title Denial of Service via RegExp Replacement in pacote addGitSha Function

Tue, 26 May 2026 06:30:00 +0000

Type Values Removed Values Added
Description Versions of the package pacote from 11.2.7 are vulnerable to Denial of Service (DoS) via the addGitSha function. An attacker can exploit this vulnerability by supplying a specially crafted spec.rawSpec value that triggers the function’s regex replacement and string-manipulation logic, causing excessive CPU consumption and potentially stalling or crashing the process.
Weaknesses CWE-1333
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: snyk

Published:

Updated: 2026-06-27T15:25:16.972Z

Reserved: 2026-05-25T09:30:49.118Z

Link: CVE-2026-9496

cve-icon Vulnrichment

Updated: 2026-05-26T12:34:11.254Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-26T07:16:19.410

Modified: 2026-06-17T11:05:22.400

Link: CVE-2026-9496

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-27T16:30:17Z

Weaknesses