CVE-2026-32260Network attack vector

Command execution via POSIX shell re-quoting

Published Mar 12, 2026 · Updated Mar 12, 2026

OS command injection in Deno 2.7.0 through 2.7.1 allows attackers to execute arbitrary commands through shell-enabled child processes. The transformDenoShellCommand path strips safe single-quote delimiters, then re-wraps arguments containing $VAR in double quotes that preserve backtick substitution in POSIX sh. Applications are exposed only when spawn or spawnSync uses shell true with attacker-controlled arguments and --allow-run, after which commands run outside Deno's permission sandbox.

CVSS severity8.1
High
EPSS probability1.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Deno 2.7.0 through 2.7.1 allows attackers to execute arbitrary commands through shell-enabled child processes. The transformDenoShellCommand path strips safe single-quote delimiters, then re-wraps arguments containing $VAR in double quotes that preserve backtick substitution in POSIX sh. Applications are exposed only when spawn or spawnSync uses shell true with attacker-controlled arguments and --allow-run, after which commands run outside Deno's permission sandbox.

The record

CVE
CVE-2026-32260
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
Deno Land Inc.
Product
Deno
Classifications
CWE-78, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.7.0, < 2.7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Deno Land Inc. · Denoversion=>= 2.7.0, < 2.7.2

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

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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