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Vulnerabilities

Vulnerability · CVE-2026-110039

Smush < 4.3.4 - Admin+ Network-Wide Plugin Settings Update on Multisite

Published Oct 16, 2026 · catalog updated Oct 16, 2026 · Unknown Smush

Check if you run it

No confirmed exploitation is on record for CVE-2026-110039. EPSS is 0.21%. Act only if a listed version of Unknown Smush is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Low2.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Version ranges on file
Affected products
stated Smush · vendor Unknown Smush

The Smush WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated Smush< 4.3.4
  • vendor Unknown Smushversion unspecified

How to fix CVE-2026-110039

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-110039. EPSS is 0.21%. Act only if a listed version of Unknown Smush is installed.

Which versions are affected?

Compare what you have installed with Smush < 4.3.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2026 · NIST NVD

    Detected

    The Smush WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.

  2. Oct 16, 2026 · CVE.org

    Updated

    The Smush WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.

Sources

  • CVE.orgVulnerability recordCVE-2026-110039

    The Smush WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-110039

    30-day exploitation probability 0.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-110039

    The Smush WordPress plugin before 4.3.4 does not restrict changes to a network-wide access setting to network administrators, allowing an administrator of a single site on a multisite network to change it for the entire network.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.