CVE-2026-9277Public exploitNetwork attack vectorHinoki check available

Command injection via unescaped object-token line terminators

Published May 22, 2026 · Updated Sep 14, 2026

OS command injection in ljharb shell-quote 1.1.0 through 1.8.3 allows remote attackers to execute arbitrary commands via crafted object tokens. The quote() function escapes .op values with a regular expression that skips line terminators, leaving shell command separators intact. Exploitation requires a caller to pass attacker-influenced object tokens to quote() and execute its output with a POSIX shell.

CVSS severity8.1
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in ljharb shell-quote 1.1.0 through 1.8.3 allows remote attackers to execute arbitrary commands via crafted object tokens. The quote() function escapes .op values with a regular expression that skips line terminators, leaving shell command separators intact. Exploitation requires a caller to pass attacker-influenced object tokens to quote() and execute its output with a POSIX shell.

The record

CVE
CVE-2026-9277
Published
May 22, 2026
Updated
Sep 14, 2026
Vendor
Red Hat
Product
Red Hat OpenShift Virtualization
Classifications
CWE-77, CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Red Hat · Red Hat OpenShift VirtualizationAffected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux AIAffected versions are unavailable in this record.
Red Hat · Red Hat Developer HubAffected versions are unavailable in this record.
Red Hat · Red Hat Migration ToolkitAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift LightspeedAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container Platform 4.14Affected versions are unavailable in this record.
Red Hat · Red Hat QuayAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container Platform 4.16Affected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container Platform 4.18Affected versions are unavailable in this record.
Red Hat · Red Hat Fuse 7Affected versions are unavailable in this record.
Red Hat · Red Hat Build of Podman Desktop - Tech PreviewAffected versions are unavailable in this record.
ljharb · shell-quoteversion=1.1.0 <1.8.4
Red Hat · Red Hat Ansible Automation PlatformAffected versions are unavailable in this record.
Red Hat · Cluster Observability OperatorAffected versions are unavailable in this record.
Red Hat · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
Red Hat · Red Hat build of CryostatAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Dev SpacesAffected versions are unavailable in this record.
Red Hat · Red Hat SatelliteAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container PlatformAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container Platform 4.17Affected versions are unavailable in this record.
Red Hat · Red Hat Build of Podman DesktopAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Service MeshAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift PipelinesAffected versions are unavailable in this record.
Red Hat · Red Hat DiscoveryAffected versions are unavailable in this record.
Red Hat · Red Hat OpenShift Container Platform 4.15Affected versions are unavailable in this record.

Published CVSS scores

9.2GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1Red HatCVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Command and Scripting Interpreter: Unix Shell

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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