[NEW] [medium] IBM App Connect Enterprise: Multiple vulnerabilities

mediumCVE-2026-12143 CVE-2026-12947 CVE-2026-42338 CVE-2026-5038 CVE-2026-5079 CVE-2026-53606

An attacker can exploit multiple vulnerabilities in IBM App Connect Enterprise to conduct a denial of service attack, disclose information, manipulate files, perform a cross-site scripting attack, and bypass security measures.

CSIRTS triage

vendor: IBM product: App Connect Enterprise Denial of service Information disclosure Cross-site scripting Authentication bypass

What: An attacker can exploit multiple vulnerabilities in IBM App Connect Enterprise to conduct a denial of service attack, disclose information, manipulate files, perform a cross-site scripting attack, and bypass security measures.
Who is affected: Users and deployments of IBM App Connect Enterprise.
Urgency: Remediation is medium urgency due to the potential for denial of service and information disclosure.
Action: Update to the latest version of IBM App Connect Enterprise to address these vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-10
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2488

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-121430.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-129470.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-423380.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-50380.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-50790.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-536060.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-536550.16% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 5% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-542690.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 34% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-542860.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 37% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-542870.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 24% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-12143	coverage & exploitation status	NVD · CVE.org
CVE-2026-12947	coverage & exploitation status	NVD · CVE.org
CVE-2026-42338	coverage & exploitation status	NVD · CVE.org
CVE-2026-5038	coverage & exploitation status	NVD · CVE.org
CVE-2026-5079	coverage & exploitation status	NVD · CVE.org
CVE-2026-53606	coverage & exploitation status	NVD · CVE.org
CVE-2026-53655	coverage & exploitation status	NVD · CVE.org
CVE-2026-54269	coverage & exploitation status	NVD · CVE.org
CVE-2026-54286	coverage & exploitation status	NVD · CVE.org
CVE-2026-54287	coverage & exploitation status	NVD · CVE.org
CVE-2026-54288	coverage & exploitation status	NVD · CVE.org
CVE-2026-54289	coverage & exploitation status	NVD · CVE.org
CVE-2026-54290	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for IBM App Connect Enterprise

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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