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Vulnerabilities

Vulnerability · CVE-2026-23899

An improper access check allows unauthorized access to webservice endpoints.

Published Apr 1, 2026 · catalog updated Jun 17, 2026 · An improper access check

Check if you run it

No confirmed exploitation is on record for CVE-2026-23899. EPSS is 0.40%. Act only if a listed version of An improper access check is installed.

Severity
High8.6
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.40%
Remediation
Advisory link
Affected products
cpe joomla/joomla!

An improper access check allows unauthorized access to webservice endpoints.

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.

  • cpe joomla/joomla!version unspecified

How to fix CVE-2026-23899

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-2026-23899. EPSS is 0.40%. Act only if a listed version of An improper access check 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-284: Improper Access Control. EPSS 0.40%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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. Apr 1, 2026 · NIST NVD

    Detected

    An improper access check allows unauthorized access to webservice endpoints.

  2. Jun 17, 2026 · NIST NVD

    Updated

    An improper access check allows unauthorized access to webservice endpoints.

Sources

  • CVE.orgVulnerability recordCVE-2026-23899

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-23899

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-23899

    An improper access check allows unauthorized access to webservice endpoints.

    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.