CVE-2026-31386Network attack vector

Administrative OS command execution via unsanitized external-app commands

Published Mar 16, 2026 · Updated Mar 16, 2026

OS command injection in OpenLiteSpeed and LiteSpeed Web Server allows remote authenticated users to execute arbitrary OS commands. Administrative external-application command values reach an OS command context without sufficient neutralization of shell metacharacters. Exploitation requires administrative access to the network-reachable WebAdmin console; successful commands can read or alter server data and interrupt hosted services.

CVSS severity8.6
High
EPSS probability1.51%
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 OpenLiteSpeed and LiteSpeed Web Server allows remote authenticated users to execute arbitrary OS commands. Administrative external-application command values reach an OS command context without sufficient neutralization of shell metacharacters. Exploitation requires administrative access to the network-reachable WebAdmin console; successful commands can read or alter server data and interrupt hosted services.

The record

CVE
CVE-2026-31386
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
LiteSpeed Technologies
Product
OpenLiteSpeed
Classifications
CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 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=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

LiteSpeed Technologies · OpenLiteSpeedversion=all versions
LiteSpeed Technologies · LiteSpeed Web Serverversion=all versions

Published CVSS scores

7.2JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.6JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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