CVE-2026-9170
Code injection vulnerability (CWE-94) in IBM HTTP Server 8.5/9.0.
Is CVE-2026-9170 being exploited?
Not confirmed. CVE-2026-9170 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.49% probability of exploitation in the next 30 days.
How severe is CVE-2026-9170?
CVE-2026-9170 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-9170?
Yes. A fix has been recorded for CVE-2026-9170. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-9170 affect?
CVE-2026-9170 affects IBM HTTP Server 8.5, IBM HTTP Server 9.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-9170?
Monitor for updates; apply patch when available.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via crafted input allowing arbitrary code execution on IBM HTTP Server 8.5/9.0.
Patch when possible
- affected8.5
- affected9.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.