Affects IBM API Connect, a widely deployed enterprise API management platform; allows sensitive data disclosure and configuration tampering that can disrupt services and integrations.
CVE-2026-17309
Improper certificate validation in IBM API Connect enabling data disclosure and config tampering
Is CVE-2026-17309 being exploited?
Not confirmed. CVE-2026-17309 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.
How severe is CVE-2026-17309?
CVE-2026-17309 is rated High with a CVSS score of 8.0. 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-2026-17309?
Not known from our data. No patch reference has been recorded for CVE-2026-17309, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-17309 affect?
CVE-2026-17309 affects IBM API Connect 12.1.0.0 through 12.1.1.2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-17309?
Apply vendor fixes/mitigations ASAP; restrict management API access and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attackers can bypass TLS cert validation to obtain sensitive info and modify configuration, enabling credential theft, API tampering, and service compromise.
Immediate action required
- affected>= 12.1.0.0 and <= 12.1.1.2
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.
timeline
- 7 Nov 2026Published
- 7 Nov 2026CVE record last updated · same day later
- 8 Nov 2026Analysed by vulneraibility.com · 1 day later
- Patchibm.com /support/pages/node/7295635
sources
- CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
- NVD: CVSS and CPE data
- FIRST EPSS: exploit probability and percentile
- Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.