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Vulnerability record · CVE-2026-17301 · published 7 November 2026

CVE-2026-17301: Ibm api connect improper verification of cryptographic signature vulnerability

Ibm · Api Connect

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow an unauthenticated attacker to bypass authentication due to improper verification of a cryptographic signature.

9.8 CVSS 3.1 Critical EPSS 0.41% · top 64.0% CWE-347 · Improper verification of cryptographic signature
9.8CVSS 3.1 base score
0.41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
10 Nov 2026Last modified by NVD

Description

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow an unauthenticated attacker to bypass authentication due to improper verification of a cryptographic signature.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.ibm.com/support/pages/node/7295635 Vendor Advisory
https://www.ibm.com/support/pages/node/7295637 PatchVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2019-4202Ibm api connect os command injection vulnerabilityIBM API Connect 5.0.0.0 and 5.0.8.6 Developer Portal is vulnerable to command injection. An attacker with a specially crafted request can run arbitra…EPSS 4.2%9.9CVE-2026-17150Ibm api connect vulnerabilityIBM 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 execute arbitrary code and ac…EPSS 0.80%9.9CVE-2026-17049Ibm api connect insecure direct object reference vulnerabilityIBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to obtain sensitive information and modify arbitrary documents …EPSS 0.51%9.9CVE-2026-16884Ibm api connect xml external entity (xxe) vulnerabilityIBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information due to an XML external entity (XXE) injection.EPSS 0.50%9.9CVE-2026-16920Ibm api connect vulnerabilityIBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to bypass security restrictions due to a confused deputy vulner…EPSS 0.50%9.9CVE-2018-1789Ibm api connect server-side request forgery (ssrf) vulnerabilityIBM API Connect v2018.1.0 through v2018.3.4 could allow an attacker to send a specially crafted request to conduct a server side request forgery atta…EPSS 1.2%9.9CVE-2018-1712Ibm api connect cross-site request forgery vulnerabilityIBM API Connect's Developer Portal 5.0.0.0 through 5.0.8.3 is vulnerable to Server Side Request Forgery. An attacker, using specially crafted input p…EPSS 0.71%9.8CVE-2026-16720Ibm api connect improper authentication vulnerabilityIBM 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 attacker to obtain valid access tokens for other users …EPSS 0.77%

Source: NIST National Vulnerability Database (record CVE-2026-17301), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.