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

CSIRTS triage

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.

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 33% 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 36% 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 23% of all EPSS-scored CVEs.

Referenced CVEs

Same CVEs, other sources

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

• highexploited[NEW] [high] Atlassian Products (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, and Jira): Multiple vulnera…cert-bund
• high[NEW] [high] Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira and Jira Service Management: Mul…cert-bund
• unknownNCSC-2026-0325 [1.00] [M/H] Vulnerabilities patched in Atlassian productsncsc-nl
• high[NEW] [high] IBM App Connect Enterprise: Multiple vulnerabilitiescert-bund
• mediumGHSA-vccv-cmxp-4j9h: sanitize-html has incomplete URI scheme validation in that allows javascript: URIs throug…ghsa
• unknownMultiple vulnerabilities in IBM products (July 31, 2026)cert-fr-avis
• highCVE-2026-12947: IBM App Connect Enterprise 13.0.1.0 through 13.0.7.2, and 12.0.1.0 through 12.0.12.27 stores p…nvd
• unknownMultiple vulnerabilities in Atlassian products (July 27, 2026)cert-fr-avis
• mediumGHSA-rv63-4mwf-qqc2: hono: Body Limit Middleware can be bypassed on AWS Lambda by understating `Content-Length…ghsa
• mediumGHSA-wgpf-jwqj-8h8p: hono: Lambda@Edge adapter keeps only the last value of a repeated request header, droppin…ghsa
• highGHSA-88fw-hqm2-52qc: hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the …ghsa
• mediumGHSA-wwfh-h76j-fc44: hono: Path traversal in `serve-static` on Windows via encoded backslash (`%5C`)ghsa

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[NEW] [high] IBM App Connect Enterprise: Multiple vulnerabilitiescert-bund · 2026-08-19
• high[NEW] [high] IBM App Connect Enterprise: Vulnerability Enables Cross-Site Scriptingcert-bund · 2026-08-19
• medium[UPDATE] [medium] IBM App Connect Enterprise (Apache Thrift): Multiple Vulnerabilitiescert-bund · 2026-08-12
• high[UPDATE] [high] IBM App Connect Enterprise: Multiple Vulnerabilitiescert-bund · 2026-08-06
• medium[UPDATE] [medium] IBM App Connect Enterprise: Multiple vulnerabilitiescert-bund · 2026-08-05
• high[UPDATE] [high] IBM App Connect Enterprise Certified Container: Multiple vulnerabilitiescert-bund · 2026-08-04

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