CVE-2026-17303

MEDIUMCVSS 6.4/10EPSS 0.29%

Last modified

CVE-2026-17303 is a medium-severity vulnerability rated 6.4/10 on the CVSS scale. 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 access internal network resources due to improper validation of a user-supplied URL. The address is not sufficiently restricted, which could allow the server to contact internal systems.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

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 a remote authenticated attacker to access internal network resources due to improper validation of a user-supplied URL. The address is not sufficiently restricted, which could allow the server to contact internal systems.

Metrics

EPSS Probability
0.29%

21.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
IbmApi Connect>= 10.0.8.0, < 10.0.8.13
IbmApi Connect>= 12.1.0.0, < 12.1.1.3

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2026-17303?
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 access internal network resources due to improper validation of a user-supplied URL. The address is not sufficiently restricted, which could allow the server to contact internal systems.
How severe is CVE-2026-17303?
CVE-2026-17303 has a CVSS score of 6.4/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.
How do I fix CVE-2026-17303?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST