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CVE-2026-18838

Multiple Vulnerabilities in IBM API Connect

9.4 Critical

CVE-2026-18838 is a critical vulnerability (CVSS 9.4) in Ibm Api Connect, published November 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.67%, the 52nd percentile. No source names a fixed version.

What does this mean?
Severity
9.4 CriticalCVSS 3.1, CVE List
Exploit chance
0.67%EPSS, 52nd percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
No fix listedNo source names one

Description

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information and modify API configurations due to improper authentication. Identity information supplied in requests is not sufficiently verified, which could allow a caller to impersonate another user.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
Low

Exploit likelihood

0.67%Unchanged since Nov 7, 2026
90%50%10%1%

Discussion

Quiet in the last day.
14 days ago: 0 people13 days ago: 0 people12 days ago: 0 people11 days ago: 0 people10 days ago: 0 people9 days ago: 0 people8 days ago: 0 people7 days ago: 0 people6 days ago: 2 people5 days ago: 0 people4 days ago: 0 people3 days ago: 0 people2 days ago: 0 people1 day ago: 0 peopleLast 24 hours: 0 people

Affected products

What each source reports

CVE List Score used9.4

Multiple Vulnerabilities in IBM API Connect

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information and modify API configurations due to improper authentication. Identity information supplied in requests is not sufficiently verified, which could allow a caller to impersonate another user.

Record
CVE-2026-18838
CVSS 3.1
9.4 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Weakness
CWE-290
Updated
2026-11-07
EUVDEUVD-2026-1187959.4

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information and modify API configurations due to improper authentication. Identity information supplied in requests is not sufficiently verified, which could allow a caller to impersonate another user.

Record
EUVD-2026-118795
CVSS 3.1
9.4 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Updated
2026-11-07
GitHub AdvisoriesGHSA-rc8r-m7cp-8q8m9.4

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive...

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information and modify API configurations due to improper authentication. Identity information supplied in requests is not sufficiently verified, which could allow a caller to impersonate another user.

Record
GHSA-rc8r-m7cp-8q8m
CVSS 3.1
9.4 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Weakness
CWE-290
Updated
2026-11-07
NVD9.4

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information and modify API configurations due to improper authentication. Identity information supplied in requests is not sufficiently verified, which could allow a caller to impersonate another user.

Record
CVE-2026-18838
CVSS 3.1
9.4 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Weakness
CWE-290
Updated
2026-11-12

History

History
RecordedChangedSources
publishedEUVD
publishedEUVD, NVD
aliases, referencesGitHub Advisories
cwes, references, severity, titleCVE List
first indexedEUVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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