How severe is CVE-2026-31386?

CVE-2026-31386 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-31386 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31386?

CVE-2026-31386 primarily affects Litespeedtech Litespeed Web Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-31386?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-31386 have an EU (EUVD) identifier?

Yes. CVE-2026-31386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12333.

When was CVE-2026-31386 published?

CVE-2026-31386 was published on 2026-03-16 and last updated on 2026-06-17.

CVE-2026-31386

CVE-2026-31386 is a high-severity vulnerability in Litespeedtech Litespeed Web Server with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v4: 8.6
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12333
Weakness: CWE-78
Affected product: Litespeedtech Litespeed Web Server
Published: 2026-03-16
Last modified: 2026-06-17

Description

OpenLiteSpeed and LSWS Enterprise provided by LiteSpeed Technologies contain an OS command injection vulnerability. An arbitrary OS command may be executed by an attacker with the administrative privilege.

Frequently asked questions

What is CVE-2026-31386?: OpenLiteSpeed and LSWS Enterprise provided by LiteSpeed Technologies contain an OS command injection vulnerability. An arbitrary OS command may be executed by an attacker with the administrative privilege.
How severe is CVE-2026-31386?: CVE-2026-31386 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-31386 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31386?: CVE-2026-31386 primarily affects Litespeedtech Litespeed Web Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-31386?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-31386 have an EU (EUVD) identifier?: Yes. CVE-2026-31386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12333.
When was CVE-2026-31386 published?: CVE-2026-31386 was published on 2026-03-16 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:litespeedtech:litespeed_web_server:*:*:*:*:*:*:*:*
cpe:2.3:a:litespeedtech:openlitespeed:*:*:*:*:*:*:*:*

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