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Fencer Intel
high 8.1

CVE-2026-9277 json

shell-quote `quote()` does not validate object-token shapes, allowing command injection via line terminators in `.op`

published 5mo ago modified last mo. also EUVD-2026-31440 , GHSA-w7jw-789q-3m8p

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.

Patch / fix

  • npm shell-quote 1.8.4
  • Red Hat Cryostat 4 on RHEL 9 4.2.0-10
  • Red Hat Cluster Observability Operator 1.5.0 1782838476, 1782838753, 1782839193, 1782839279, 1782839494, 1782839658, 1782839981, 1782839996, 1782840519, 1782840539, 1782841925, 1782844225
  • Red Hat Red Hat Ansible Automation Platform 2.1 1785854226
  • Red Hat Red Hat Developer Hub 1.10 1783448184
  • Red Hat Red Hat Developer Hub 1.9 1782761244
  • Red Hat Red Hat Discovery 2 1782166952
  • Red Hat Red Hat Migration Toolkit 1.8 1783690532
  • Red Hat Red Hat OpenShift Container Platform 4.14 1788218669
  • Red Hat Red Hat OpenShift Container Platform 4.15 1787028559
  • Red Hat Red Hat OpenShift Container Platform 4.16 1787054159
  • Red Hat Red Hat OpenShift Container Platform 4.17 1787631382
  • Red Hat Red Hat OpenShift Container Platform 4.18 1785278569
  • Red Hat Red Hat OpenShift Container Platform 4.19 1783718157
  • Red Hat Red Hat OpenShift Container Platform 4.20 1782911711, 1784724699
  • Red Hat Red Hat OpenShift Container Platform 4.21 1782308675, 1784713741
  • Red Hat Red Hat OpenShift Container Platform 4.22 1782224390, 1784721581
  • Red Hat Red Hat OpenShift Dev Spaces 3.30 1787762793
  • Red Hat Red Hat OpenShift Service Mesh 2.6 1780907585, 1780916536
  • Red Hat Red Hat OpenShift Service Mesh 3.0 1780470245, 1780916345
  • Red Hat Red Hat OpenShift Service Mesh 3.1 1780470706, 1780916478
  • Red Hat Red Hat OpenShift Service Mesh 3.2 1780470003, 1780916392
  • Red Hat Red Hat OpenShift Service Mesh 3.3 1780997382, 1780997438
  • Red Hat Red Hat Quay 3.10 1782487717
  • Red Hat Red Hat Quay 3.12 1781937357
  • Red Hat Red Hat Quay 3.15 1784351966
  • Red Hat Red Hat Quay 3.16 1783955846
  • Red Hat Red Hat Quay 3.9 1781878070
  • Red Hat Red Hat Satellite 6.18 1781032495
  • node-shell-quote Debian 12 1.7.4+~1.7.1-1+deb12u1
  • node-shell-quote Debian 13 1.7.4+~1.7.1-1+deb13u1
  • node-shell-quote Debian 14 1.8.4+~1.7.5-1

debian advisories DEBIAN-CVE-2026-9277

  • node-shell-quote Ubuntu 24.04 LTS 1.7.4+~1.7.1-1ubuntu0.24.04.1
  • node-shell-quote Ubuntu 25.10 1.7.4+~1.7.1-1ubuntu0.25.10.1
  • node-shell-quote Ubuntu Pro 18.04 LTS 1.6.1+20160617-git72fb5a8ce29b-1ubuntu0.1~esm1
  • node-shell-quote Ubuntu Pro 22.04 LTS 1.7.3+~1.7.1-1ubuntu0.1~esm1
  • node-shell-quote Ubuntu Pro 26.04 LTS 1.8.3+~1.7.5-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2026-9277

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • agama-web-ui openSUSE Tumbleweed 21+360.16caae772-44.1
  • agama-web-ui openSUSE Leap 16.0 17+612.d8bf69336-160000.11.1
  • python-pytest-html openSUSE Tumbleweed 4.2.0-2.1

opensuse advisories openSUSE-SU-2026:10979-1openSUSE-SU-2026:20919-1openSUSE-SU-2026:10861-1

Is CVE-2026-9277 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2026-9277 updated cvss 8.1

shell-quote: shell-quote: Arbitrary code execution via command injection due to unescaped line terminators

  • Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-console-plugin-rhel9, openshift-lightspeed/lightspeed-console-plugin-419-rhel9, openshift-lightspeed/lightspeed-console-plugin-pf5-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-hub-ui-rhel8, openshift-pipelines/pipelines-hub-ui-rhel9
    affected: no fix available
  • Red Hat Ansible Automation Platform 2 ansible-automation-platform-24/lightspeed-rhel8, ansible-automation-platform-25/lightspeed-rhel8, ansible-automation-platform-26/lightspeed-rhel9 Red Hat Build of Podman Desktop rh-podman-desktop.git
    affected: no fix planned “Will not fix”
  • Red Hat Build of Podman Desktop - Tech Preview rhdesktop/rh-podman-desktop-ext-bootc-rhel10
    affected: no fix available
  • Red Hat Enterprise Linux 9 grafana, grafana-selinux 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 Red Hat Fuse 7 shell-quote
    affected: no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 5 openshift5/ose-console-rhel9, openshift4/ose-agent-installer-ui, openshift5/ose-agent-installer-ui-rhel9
    affected: no fix available
  • Red Hat Cluster Observability Operator 1.5 cluster-observability-operator/logging-console-plugin-rhel9 1782841925, cluster-observability-operator/monitoring-console-plugin-rhel9 1782838476, cluster-observability-operator/logging-console-plugin-pf4-rhel9 1782839279, cluster-observability-operator/logging-console-plugin-pf5-rhel9 1782840539, cluster-observability-operator/monitoring-console-plugin-pf5-rhel9 1782844225, cluster-observability-operator/monitoring-console-plugin-pf6-rhel9 1782839658, +6 more
    fixed: vendor fix RHSA-2026:34342
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-openshift-console-plugin-rhel9 4.2.0-10
    fixed: vendor fix RHSA-2026:28010
  • Red Hat Ansible Automation Platform 2.1 ansible-automation-platform/automation-portal 1785854226
    fixed: vendor fix RHSA-2026:50850
show 28 more
  • Red Hat Container Native Virtualization 4.17 container-native-virtualization/kubevirt-console-plugin-rhel9 1793395171
    fixed: vendor fix RHSA-2026:93951
  • Red Hat Developer Hub 1.9 rhdh/rhdh-hub-rhel9 1782761244
    fixed: vendor fix RHSA-2026:33574
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1783448184
    fixed: vendor fix RHSA-2026:36754
  • Red Hat Discovery 2 discovery/discovery-ui-rhel9 1782166952
    fixed: vendor fix RHSA-2026:29197
  • Red Hat Migration Toolkit 1.8 rhmtc/openshift-migration-ui-rhel8 1783690532
    fixed: vendor fix RHSA-2026:41928
  • Red Hat OpenShift Container Platform 4.12 openshift4/ose-console 1790102793
    fixed: vendor fix RHSA-2026:70647
  • Red Hat OpenShift Container Platform 4.13 openshift4/ose-console 1788900680
    fixed: vendor fix RHSA-2026:65840
  • Red Hat OpenShift Container Platform 4.14 openshift4/ose-console 1788218669
    fixed: vendor fix RHSA-2026:62410
  • Red Hat OpenShift Container Platform 4.15 openshift4/ose-console 1787028559
    fixed: vendor fix RHSA-2026:56912
  • Red Hat OpenShift Container Platform 4.16 openshift4/ose-console-rhel9 1787054159
    fixed: vendor fix RHSA-2026:56854
  • Red Hat OpenShift Container Platform 4.17 openshift4/ose-console-rhel9 1787631382
    fixed: vendor fix RHSA-2026:60023
  • Red Hat OpenShift Container Platform 4.18 openshift4/ose-console-rhel9 1785278569
    fixed: vendor fix RHSA-2026:48699
  • Red Hat OpenShift Container Platform 4.19 openshift4/ose-console-rhel9 1783718157
    fixed: vendor fix RHSA-2026:40765
  • Red Hat OpenShift Container Platform 4.20 openshift4/ose-console-rhel9 1782911711, openshift4/ose-agent-installer-ui-rhel9 1784724699
    fixed: vendor fix RHSA-2026:44263
  • Red Hat OpenShift Container Platform 4.21 openshift4/ose-console-rhel9 1782308675, openshift4/ose-agent-installer-ui-rhel9 1784713741
    fixed: vendor fix RHSA-2026:44267
  • Red Hat OpenShift Container Platform 4.22 openshift4/ose-console-rhel9 1782224390, openshift4/ose-agent-installer-ui-rhel9 1784721581
    fixed: vendor fix RHSA-2026:44237
  • Red Hat OpenShift Dev Spaces 3.30 devspaces/code-rhel9 1787762793
    fixed: vendor fix RHSA-2026:62260
  • Red Hat OpenShift Service Mesh 2.6 openshift-service-mesh/kiali-rhel8 1780916536, openshift-service-mesh/kiali-ossmc-rhel8 1780907585
    fixed: vendor fix RHSA-2026:26072
  • Red Hat OpenShift Service Mesh 3.0 openshift-service-mesh/kiali-rhel9 1780916345, openshift-service-mesh/kiali-ossmc-rhel9 1780470245
    fixed: vendor fix RHSA-2026:26080
  • Red Hat OpenShift Service Mesh 3.1 openshift-service-mesh/kiali-rhel9 1780916478, openshift-service-mesh/kiali-ossmc-rhel9 1780470706
    fixed: vendor fix RHSA-2026:26077
  • Red Hat OpenShift Service Mesh 3.2 openshift-service-mesh/kiali-rhel9 1780916392, openshift-service-mesh/kiali-ossmc-rhel9 1780470003
    fixed: vendor fix RHSA-2026:26079
  • Red Hat OpenShift Service Mesh 3.3 openshift-service-mesh/kiali-rhel9 1780997438, openshift-service-mesh/kiali-ossmc-rhel9 1780997382
    fixed: vendor fix RHSA-2026:26090
  • Red Hat Quay 3.9 quay/quay-rhel8 1781878070
    fixed: vendor fix RHSA-2026:28571
  • Red Hat Quay 3.10 quay/quay-rhel8 1782487717
    fixed: vendor fix RHSA-2026:33683
  • Red Hat Quay 3.12 quay/quay-rhel8 1781937357
    fixed: vendor fix RHSA-2026:30076
  • Red Hat Quay 3.14 quay/quay-rhel8 1788593843
    fixed: vendor fix RHSA-2026:70267
  • Red Hat Quay 3.15 quay/quay-rhel8 1784351966
    fixed: vendor fix RHSA-2026:42796
  • Red Hat Quay 3.16 quay/quay-rhel9 1783955846
    fixed: vendor fix RHSA-2026:41066

2 more fixed, 40 more not affected in the full advisory

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
none
Automatable
no
Technical impact
total
Assessed
5mo ago

Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 9.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 4.0 9.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/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

Affected packages

ecosystem package affected fixed in
npm shell-quote
>=1.1.0, <1.8.4
1.8.4

Affected products

  • Red Hat Cryostat 4 on RHEL 9
  • Red Hat Cluster Observability Operator 1.5.0
  • Red Hat Red Hat Ansible Automation Platform 2.1
  • Red Hat Red Hat Developer Hub 1.10
  • Red Hat Red Hat Developer Hub 1.9
  • Red Hat Red Hat Discovery 2
  • Red Hat Red Hat Migration Toolkit 1.8
  • Red Hat Red Hat OpenShift Container Platform 4.14
  • Red Hat Red Hat OpenShift Container Platform 4.15
  • Red Hat Red Hat OpenShift Container Platform 4.16
  • Red Hat Red Hat OpenShift Container Platform 4.17
  • Red Hat Red Hat OpenShift Container Platform 4.18
  • Red Hat Red Hat OpenShift Container Platform 4.19
  • Red Hat Red Hat OpenShift Container Platform 4.20
  • Red Hat Red Hat OpenShift Container Platform 4.21
  • Red Hat Red Hat OpenShift Container Platform 4.22
  • Red Hat Red Hat OpenShift Dev Spaces 3.30
  • Red Hat Red Hat OpenShift Service Mesh 2.6
  • Red Hat Red Hat OpenShift Service Mesh 3.0
  • Red Hat Red Hat OpenShift Service Mesh 3.1
  • Red Hat Red Hat OpenShift Service Mesh 3.2
  • Red Hat Red Hat OpenShift Service Mesh 3.3
  • Red Hat Red Hat Quay 3.10
  • Red Hat Red Hat Quay 3.12
  • Red Hat Red Hat Quay 3.15
  • Red Hat Red Hat Quay 3.16
  • Red Hat Red Hat Quay 3.9
  • Red Hat Red Hat Satellite 6.18
  • Red Hat Cryostat 4
  • Red Hat Gatekeeper 3
  • Red Hat Node HealthCheck Operator
  • Red Hat OpenShift Lightspeed
  • Red Hat OpenShift Pipelines
  • Red Hat OpenShift Service Mesh 3
  • Red Hat Red Hat AMQ Broker 7
  • Red Hat Red Hat Ansible Automation Platform 2
  • Red Hat Red Hat build of Apache Camel - HawtIO 4
  • Red Hat Red Hat Build of Podman Desktop
  • Red Hat Red Hat Build of Podman Desktop - Tech Preview
  • Red Hat Red Hat Data Grid 8
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux AI (RHEL AI) 3
  • Red Hat Red Hat Fuse 7
  • Red Hat Red Hat OpenShift AI (RHOAI)
  • Red Hat Red Hat OpenShift Virtualization 4
  • Red Hat Red Hat Trusted Artifact Signer

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

Sources

Fencer Intel 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.

The maintainers of ljharb/shell-quote published their own advisory on GitHub. Reviewed sources take precedence over it.