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Vulnerabilities

Vulnerability · CVE-2026-3906

WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1.

Published Mar 11, 2026 · catalog updated Jun 17, 2026 · WordPress core is vulnerable

Check if you run it

No confirmed exploitation is on record for CVE-2026-3906. EPSS is 0.41%. Act only if a listed version of WordPress core is vulnerable is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (WordPress core is vulnerable).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.41%
Remediation
Not established
Affected products
See sources for product scope

WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes feature (block-level collaboration annotations) was introduced in WordPress 6.9 to allow editorial comments directly on posts in the block editor. However, the REST API method in the comments controller did not verify that the authenticated user has permission on the target post when creating a note. This makes it possible for authenticated attackers with Subscriber-level access to create notes on any post, including posts authored by other users, private posts, and posts in any status.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-3906

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-2026-3906. EPSS is 0.41%. Act only if a listed version of WordPress core is vulnerable is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS 0.41%. 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. Mar 11, 2026 · NIST NVD

    Detected

    WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes feature (block-level collaboration annotations) was introduced in WordPress 6.9 to allow editorial comments directly on posts in the block editor. However, the REST API method in the comments controller did not verify that the authenticated user has permission on the target post when creating a note. This

  2. Jun 17, 2026 · NIST NVD

    Updated

    WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes feature (block-level collaboration annotations) was introduced in WordPress 6.9 to allow editorial comments directly on posts in the block editor. However, the REST API method in the comments controller did not verify that the authenticated user has permission on the target post when creating a note. This

Sources

  • CVE.orgVulnerability recordCVE-2026-3906

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-3906

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-3906

    WordPress core is vulnerable to unauthorized access in versions 6.9 through 6.9.1. The Notes feature (block-level collaboration annotations) was introduced in WordPress 6.9 to allow editorial comments directly on posts in the block editor. However, the REST API `create_item_permi

    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.