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

mediumCVE-2026-3449 CVE-2026-45149 CVE-2026-45736 CVE-2026-8723

An attacker can exploit multiple vulnerabilities in IBM App Connect Enterprise to perform a denial of service attack and disclose information.

CSIRTS triage

vendor: IBM product: App Connect Enterprise Denial of service Information disclosure

What: Multiple vulnerabilities in IBM App Connect Enterprise enable denial of service and information disclosure.
Who is affected: Deployments of IBM App Connect Enterprise handling untrusted input are affected.
Urgency: Medium severity with multiple attack vectors warrants timely patching.
Action: Update IBM App Connect Enterprise to a version containing patches for all four CVEs listed.

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: 2026-08-05
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-2026-2118

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-2026-34490.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-451490.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-457360.74% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all EPSS-scored CVEs.
Low exploitation riskCVE-2026-87230.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-3449	coverage & exploitation status	NVD · CVE.org
CVE-2026-45149	coverage & exploitation status	NVD · CVE.org
CVE-2026-45736	coverage & exploitation status	NVD · CVE.org
CVE-2026-8723	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

highexploited[UPDATE] [high] Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira and Jira Service Management: …cert-bund
high[NEW] [high] Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira and Jira Service Management: Mul…cert-bund
unknownMultiple vulnerabilities in IBM products (July 31, 2026)cert-fr-avis
unknownMultiple vulnerabilities in IBM products (July 17, 2026)cert-fr-avis

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.

high[UPDATE] [high] IBM App Connect Enterprise: Multiple Vulnerabilitiescert-bund · 2026-08-06
high[UPDATE] [high] IBM App Connect Enterprise Certified Container: Multiple vulnerabilitiescert-bund · 2026-08-04
medium[UPDATE] [medium] IBM App Connect Enterprise (Axios): Multiple vulnerabilitiescert-bund · 2026-08-04
medium[NEW] [medium] IBM App Connect Enterprise: Multiple vulnerabilitiescert-bund · 2026-08-03
high[NEW] [high] IBM App Connect Enterprise: Multiple vulnerabilitiescert-bund · 2026-07-31
criticalCVE-2026-15435: IBM App Connect Enterprise 13.0.1.0 through 13.0.7.2, and 12.0.1.0 through 12.0.12.27 could al…nvd · 2026-07-30