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Fencer Vulns
high 7.5

CVE-2026-9496 json

pacote is vulnerable to Denial of Service (DoS) via the addGitSha function

published 2026-05-26 5 mo ago modified 2026-09-10 1 mo ago also GHSA-w4pp-8pjf-rmxw , EUVD-2026-31793

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm pacote 21.5.1
  • n/a pacote 21.5.1
  • npm Debian 14 12.0.2+ds1-1

debian advisories DEBIAN-CVE-2026-9496

  • npm RHEL 9 1:10.9.8-1.22.23.2.2.module+el9.8.0+24958+80b2ac6e
  • nodejs RHEL 9 1:22.23.2-2.module+el9.8.0+24958+80b2ac6e
  • nodejs-libs RHEL 9 1:22.23.2-2.module+el9.8.0+24958+80b2ac6e
  • nodejs-nodemon RHEL 9 3.1.14-2.module+el9.8.0+24709+804d6b5b
  • nodejs-full-i18n RHEL 9 1:22.23.2-2.module+el9.8.0+24958+80b2ac6e
  • nodejs-packaging RHEL 9 2021.06-6.module+el9.8.0+24709+804d6b5b
  • nodejs-packaging-bundler RHEL 9 2021.06-6.module+el9.8.0+24709+804d6b5b
  • nodejs22 RHEL 10.2 1:22.23.2-3.el10_2

red hat advisories RHSA-2026:84589RHSA-2026:84703RHSA-2026:76750RHSA-2026:75864RHSA-2026:75870RHSA-2026:72497

  • nodejs20 SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 20.20.2-150500.11.30.1
  • nodejs24 SLES for SAP applications 16.0, SLES 16.0 24.18.0-160000.1.1
  • nodejs22 SLE Module for Web and Scripting 15 SP7 22.23.0-150700.3.12.1
  • nodejs24 SLE Module for Web and Scripting 15 SP7 24.17.0-150700.15.11.1
  • nodejs22 SLES for SAP applications 16.0, SLES 16.0 22.23.0-160000.1.1
  • nodejs20 SLES for SAP 15 SP6, SLES 15 SP6-LTSS 20.20.2-150600.3.21.1
  • nodejs22 SLES for SAP 15 SP6, SLES 15 SP6-LTSS 22.23.0-150600.13.18.1

suse advisories SUSE-SU-2026:3930-1SUSE-SU-2026:3929-1SUSE-SU-2026:22565-1SUSE-SU-2026:2695-1SUSE-SU-2026:2647-1SUSE-SU-2026:2633-1

  • nodejs24 openSUSE Leap 16.0 24.18.0-160000.1.1
  • nodejs22 openSUSE Leap 16.0 22.23.0-160000.1.1
  • nodejs24 openSUSE Tumbleweed 24.17.0-1.1

opensuse advisories openSUSE-SU-2026:21236-1openSUSE-SU-2026:21058-1openSUSE-SU-2026:11121-1

  • npm AlmaLinux 9 1:10.9.8-1.22.23.2.2.module_el9.8.0+322+f4aa738c
  • nodejs AlmaLinux 9 1:22.23.2-2.module_el9.8.0+322+f4aa738c
  • nodejs-libs AlmaLinux 9 1:22.23.2-2.module_el9.8.0+322+f4aa738c
  • nodejs-nodemon AlmaLinux 9 3.1.14-2.module_el9.8.0+302+959ebcd4
  • nodejs-full-i18n AlmaLinux 9 1:22.23.2-2.module_el9.8.0+322+f4aa738c
  • nodejs-packaging AlmaLinux 9 2021.06-6.module_el9.7.0+227+12323393
  • nodejs-packaging-bundler AlmaLinux 9 2021.06-6.module_el9.7.0+227+12323393
  • nodejs AlmaLinux 10 1:22.23.2-3.el10_2

almalinux advisories ALSA-2026:76750ALSA-2026:75864ALSA-2026:75870

  • nodejs Rocky Linux 9 1:22.23.2-2.module+el9.8.0+40374+17512296
  • nodejs-nodemon Rocky Linux 9 3.1.14-2.module+el9.8.0+40280+057606e8
  • nodejs-nodemon Rocky Linux 9 3.1.14-2.module+el9.8.0+40264+d9b257bb
  • nodejs-packaging Rocky Linux 9 2021.06-6.module+el9.7.0+40052+e32ea525
  • nodejs-packaging Rocky Linux 9 2021.06-6.module+el9.7.0+40153+4d595597
  • nodejs-packaging Rocky Linux 9 2021.06-6.module+el9.7.0+40165+d075e3f2
  • nodejs-packaging Rocky Linux 9 2021.06-6.module+el9.8.0+40164+8921ab53
  • nodejs22 Rocky Linux 10 1:22.23.2-3.el10_2

rocky linux advisories RLSA-2026:76750RLSA-2026:75864RLSA-2026:75870

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-9496 updated cvss 7.5

pacote: Pacote: Denial of Service via crafted spec.rawSpec value in addGitSha function

  • Red Hat Exploit Intelligence exploit-intelligence/vulnerability-analysis-rhel9, exploit-intelligence-tech-preview/vulnerability-analysis-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Ceph Storage 4 rhceph/rhceph-4-dashboard-rhel8
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 8 npm, nodejs, nodejs-libs, nodejs-nodemon, nodejs-full-i18n, nodejs-packaging, +1 more Red Hat Enterprise Linux 9 npm, nodejs, nodejs-libs, nodejs-full-i18n Red Hat Enterprise Linux 10 nodejs24, nodejs26
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux AI (RHEL AI) 3 rhelai3/bootc-cuda-rhel9, rhelai3/bootc-rocm-rhel9, rhelai3/bootc-gaudi-rhel9, rhelai3/disk-image-cuda-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift AI (RHOAI) rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel9
    affected: workaround, no fix available
  • Red Hat Ansible Automation Platform 2.2 ansible-automation-platform/bootc-automation-portal-rhel9 1792641102
    fixed: vendor fix RHSA-2026:88200
  • Red Hat Enterprise Linux AppStream (v. 8) nodejs 22.23.2-2.module+el8.10.0+24957+74108fbf, nodejs-libs 22.23.2-2.module+el8.10.0+24957+74108fbf, npm 10.9.8-1.22.23.2.2.module+el8.10.0+24957+74108fbf, nodejs-nodemon 3.1.14-2.module+el8.10.0+24710+c2e9b41f, nodejs-full-i18n 22.23.2-2.module+el8.10.0+24957+74108fbf, nodejs-packaging 2021.06-6.module+el8.10.0+24710+c2e9b41f, +1 more
    fixed: vendor fix RHSA-2026:75870
  • Red Hat Enterprise Linux AppStream (v. 9) nodejs 22.23.2-2.module+el9.8.0+24958+80b2ac6e, nodejs-libs 22.23.2-2.module+el9.8.0+24958+80b2ac6e, npm 10.9.8-1.22.23.2.2.module+el9.8.0+24958+80b2ac6e, nodejs-nodemon 3.1.14-2.module+el9.8.0+24709+804d6b5b, nodejs-full-i18n 22.23.2-2.module+el9.8.0+24958+80b2ac6e, nodejs-packaging 2021.06-6.module+el9.8.0+24709+804d6b5b, +1 more
    fixed: vendor fix RHSA-2026:76750
show 14 more
  • Red Hat Enterprise Linux AppStream (v. 10) nodejs 22.23.2-3.el10_2, nodejs22 22.23.2-3.el10_2, nodejs-libs 22.23.2-3.el10_2, nodejs-full-i18n 22.23.2-3.el10_2, nodejs-npm 10.9.8-1.22.23.2.3.el10_2
    fixed: vendor fix RHSA-2026:75864
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) nodejs 22.23.2-2.el10_0, nodejs22 22.23.2-2.el10_0, nodejs-libs 22.23.2-2.el10_0, nodejs-full-i18n 22.23.2-2.el10_0, nodejs-npm 10.9.8-1.22.23.2.2.el10_0
    fixed: vendor fix RHSA-2026:84703
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) nodejs 22.23.2-2.module+el9.6.0+25055+19201b10, nodejs-libs 22.23.2-2.module+el9.6.0+25055+19201b10, npm 10.9.8-1.22.23.2.2.module+el9.6.0+25055+19201b10, nodejs-nodemon 3.1.14-2.module+el9.6.0+24789+4011c12f, nodejs-full-i18n 22.23.2-2.module+el9.6.0+25055+19201b10, nodejs-packaging 2021.06-4.module+el9.6.0+23473+45664c2d, +1 more
    fixed: vendor fix RHSA-2026:84589
  • Red Hat Hardened Images grafana12.4 12.4.10-0.8.hum1, grafana12.4 12.4.10-0.9.hum1
    fixed: vendor fix RHSA-2026:72116
  • Red Hat OpenShift Dev Spaces 3.31 devspaces/udi-rhel9 1792708612, devspaces/openvsx-rhel9 1792494821, devspaces/dashboard-rhel9 1791945540, devspaces/pluginregistry-rhel9 1792495212
    fixed: vendor fix RHSA-2026:90321
  • Red Hat Satellite 6.18 satellite/iop-remediations-rhel9 1793065138
    fixed: vendor fix RHSA-2026:92584
  • Red Hat Satellite 6.19 satellite/iop-remediations-rhel9 1793092253
    fixed: vendor fix RHSA-2026:92578
  • Red Hat Migration Toolkit for Applications 8 mta/mta-cli-rhel9, mta/mta-generic-external-provider-rhel9
    not affected: vulnerable code not present
  • Red Hat 3scale API Management Platform 2 3scale-amp2/toolbox-rhel9
    not affected: vulnerable code not in execute path
  • Red Hat Connectivity Link 1 rhcl-1/rhcl-console-plugin-rhel9 Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    not affected: vulnerable code not present
  • Red Hat Enterprise Linux 9 grafana, grafana-selinux Red Hat Enterprise Linux 10 grafana
    not affected: component not present
  • Red Hat Fuse 7 pacote
    not affected: vulnerable code not present
  • Red Hat Hardened Images grafana13.1, grafana13.2
    not affected: component not present
  • Red Hat OpenShift Dev Spaces 3.31 devspaces/code-rhel9 1792599388, devspaces/server-rhel9 1792775639, devspaces/traefik-rhel9 1792464177, devspaces/udi-base-rhel9 1792686842, devspaces/code-sshd-rhel9 1792598059, devspaces/configbump-rhel9 1792461966, +6 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • security.snyk.io https://security.snyk.io/vuln/SNYK-JS-PACOTE-8225084 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 8.7 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
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
CNA 4.0 7.7 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/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
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm pacote
>=11.2.7, <21.5.1
21.5.1

Affected products

  • n/a pacote
  • n/a org.webjars.npm:pacote

Classification

Weakness
  • CWE-1333 Inefficient Regular Expression Complexity
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.