CVE-2026-9277

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.85% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 55.5% of scored records. A rank, not a probability.

NVD base score

9.2 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-09-02.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-05-22 13:22Z3 MO AGO

Last updated

2026-09-04 12:04Z1 HR AGO

Reserved

2026-05-22

Assigning CNA

harborist

Record state

PUBLISHED

Severity

Critical (CVSS 9.2)

CNA CVSS vector

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

Weaknesses

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class
• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.2

Document digest

9d8707b8ad660d936f3ef0314e22a401109f7f00dc20b1d314a85b539eeb88a6

• github.comGHSA-w7jw-789q-3m8phttps://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8pvendor-advisory
• github.comFix commithttps://github.com/ljharb/shell-quote/commit/1518179patch
• github.comhttps://github.com/ljharb/shell-quoteproduct
• www.npmjs.comhttps://www.npmjs.com/package/shell-quoteproduct
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/05/23/2
• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-9277vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2480741https://bugzilla.redhat.com/show_bug.cgi?id=2480741issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9277.jsonx_sadp-csaf-vex
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