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Vulnerabilities

Vulnerability · CVE-2026-54840

Unauthenticated Broken Access Control in Newsletters <= 4.13 versions.

Published Jun 26, 2026 · catalog updated Oct 25, 2026 · Unauthenticated Broken Access Control

Last checked Oct 25, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-54840. EPSS is 0.30%. Act only if a listed version of Unauthenticated Broken Access Control is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Unauthenticated Broken Access Control).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.30%
Remediation
Version ranges on file
Affected products
stated named in the record

Unauthenticated Broken Access Control in Newsletters <= 4.13 versions.

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 named in the record<= 4.13

How to fix CVE-2026-54840

  • Upgrade

    CVE-2026-54840 lists a fix boundary at 4.13. Compare the installed build with that boundary before you change production.

  • Version check

    Affected <= 4.13

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

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-2026-54840. EPSS is 0.30%. Act only if a listed version of Unauthenticated Broken Access Control is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 4.13. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-862: Missing Authorization. EPSS 0.30%. 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. Jun 26, 2026 · NIST NVD

    Detected

    Unauthenticated Broken Access Control in Newsletters <= 4.13 versions.

  2. Oct 25, 2026 · NIST NVD

    Updated

    Unauthenticated Broken Access Control in Newsletters <= 4.13 versions.

Sources

  • CVE.orgVulnerability recordCVE-2026-54840

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-54840

    Unauthenticated Broken Access Control in Newsletters <= 4.13 versions.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 25, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 25, 2026
  • NIST NVDOct 25, 2026