PT-2026-43191 · Npm · Pacote

Rongchen Li · Published 2026-05-26 · Updated 2026-05-26 · CVE-2026-9496

Positive Technologies (AI Summary)

CVSS v4.0

7.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions pacote versions 11.2.7 and later

Description A Regular Expression Denial of Service (ReDoS) exists in the addGitSha() function. An attacker can cause excessive CPU consumption, potentially stalling or crashing the process, by providing a specially crafted spec.rawSpec value. This occurs when the function's regex replacement and string-manipulation logic are triggered, pinning a CPU core. The issue is reachable by unauthenticated users wherever the library consumes user-controlled package specifications.

Recommendations As a temporary mitigation, validate package specifications before passing them to the library. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

CWE-1333

Related Identifiers

CVE-2026-9496

Affected Products

Pacote

References · 8

• 🔥 https://security.snyk.io/vuln/SNYK-JS-PACOTE-8225084 · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-9496 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-9496 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-9496 · Vendor Advisory
• https://github.com/npm/pacote/blob/9d7459440826ab4cf962ef98d8f3fd0c4d464b5c/lib/util/add-git-sha.js%23L2C1-L13C2 · Note
• https://twitter.com/UpwindMDR/status/2059273264908661191 · Twitter Post
• https://t.me/CVEtracker/54956 · Telegram Post
• https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-16874025 · Note