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Vulnerabilities

Vulnerability · CVE-2026-9170

IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.

Published May 26, 2026 · catalog updated Jul 20, 2026 · http server

Check if you run it

No confirmed exploitation is on record for CVE-2026-9170. EPSS is 0.86%. Act only if a listed version of http server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.86%
Remediation
Advisory link
Affected products
cpe ibm/http server

IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.

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 ibm/http server8.5.0.0
  • cpe ibm/http server9.0.0.0

How to fix CVE-2026-9170

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-2026-9170. EPSS is 0.86%. Act only if a listed version of http server is installed.

Which versions are affected?

Compare what you have installed with ibm/http server 8.5.0.0; ibm/http server 9.0.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-94: Code Injection. EPSS 0.86%. 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. May 26, 2026 · NIST NVD

    Detected

    IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.

  2. Jul 20, 2026 · NIST NVD

    Updated

    IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.

Sources

  • CVE.orgVulnerability recordCVE-2026-9170

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-9170

    30-day exploitation probability 0.9%

    first.org
  • NIST NVDVulnerability recordCVE-2026-9170

    IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.

    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.