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Vulnerability record

CVE-2026-17291

criticalCVSS 3.1 9.0EPSS 0.53%Published · IBM

The short answer

CVE-2026-17291 affects IBM API Connect and is rated critical (CVSS 9.0). It is not in CISA's KEV catalog; EPSS puts the chance of exploitation in the next 30 days at 0.53%. The vendor has linked a patch.

What it is

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to perform account takeover due to an open redirect vulnerability. The redirect address used during OAuth 2.0 sign-in is not sufficiently validated, which could allow authentication results to be sent to an attacker-controlled location.

Weakness: CWE-601.

Severity

9.0 critical

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Exploited (CISA KEV)

Not listed

CISA lists confirmed exploitation only

EPSS, next 30 days

0.53%

Higher than 45% of scored CVEs

How it can be exploited

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Affected products

API Connect. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2026-17291 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog as of 2026-11-13. FIRST's EPSS estimates a 0.53% chance of exploitation in the next 30 days.

How do I fix CVE-2026-17291?

Follow the vendor advisory in the references below. NVD lists the affected versions under its configurations.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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