High severity · published Aug 28, 2026
CVE-2026-81285
WordPress Smush Image Compression and Optimization plugin <= 4.2.0 - Denial of Service Attack vulnerability
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
Unauthenticated Denial of Service Attack in Smush Image Compression and Optimization <= 4.2.0 versions.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SI
Smush Image Compression and Optimization · WPMU DEV
through 4.2.0 · source: vendor
Affected product
SI
Smush Image Compression and Optimization
WPMU DEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81285
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81285
patchstack.com
https://patchstack.com/database/wordpress/plugin/wp-smushit/vulnerability/wordpress-smush-image-compression-and-optimization-plugin-4-2-0-denial-of-service-attack-vulnerability?_s_id=cve