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Vulnerabilities

Vulnerability · CVE-2026-26935

Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)

Published Feb 26, 2026 · catalog updated Jun 17, 2026 · Improper Input Validation (CWE-20)

Check if you run it

No confirmed exploitation is on record for CVE-2026-26935. EPSS is 0.51%. Act only if a listed version of Improper Input Validation (CWE-20) is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Improper Input Validation (CWE-20)).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.51%
Remediation
Advisory link
Affected products
cpe elastic/kibana

Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)

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 elastic/kibana9.3.0

How to fix CVE-2026-26935

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-2026-26935. EPSS is 0.51%. Act only if a listed version of Improper Input Validation (CWE-20) is installed.

Which versions are affected?

Compare what you have installed with 9.3.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-20: Improper Input Validation. EPSS 0.51%. 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. Feb 26, 2026 · NIST NVD

    Detected

    Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)

  2. Jun 17, 2026 · NIST NVD

    Updated

    Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)

Sources

  • CVE.orgVulnerability recordCVE-2026-26935

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-26935

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-26935

    Improper Input Validation (CWE-20) in the internal Content Connectors search endpoint in Kibana can lead Denial of Service via Input Data Manipulation (CAPEC-153)

    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.