[UPDATE] [medium] Apache Kafka: Multiple vulnerabilities
An attacker can exploit multiple vulnerabilities in Apache Kafka to bypass security measures and disclose information.
CSIRTS triage
- What
- Multiple vulnerabilities in Kafka enable security measure bypass and information disclosure.
- Who is affected
- Apache Kafka deployments exposed to remote attackers.
- Urgency
- Medium severity; information disclosure and bypass; patch according to standard schedule.
- Action
- Upgrade Kafka to the patched version and review access controls.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1166
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-2026-335570.68% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 50% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-335580.63% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 47% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-33557 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-33558 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownNCSC-2026-0312 [1.00] [M/H] Vulnerabilities resolved in Oracle Financial Servicesncsc-nl
- high[NEW] [high] Oracle Financial Services Applications: Multiple vulnerabilitiescert-bund
- unknownMultiple vulnerabilities in IBM products (July 31, 2026)cert-fr-avis
- high[NEW] [high] Oracle Communications: Multiple vulnerabilitiescert-bund
- high[NEW] [high] Oracle Fusion Middleware: Multiple vulnerabilitiescert-bund
- unknownNCSC-2026-0258 [1.00] [M/H] Vulnerabilities fixed in Oracle Financial Servicesncsc-nl
- unknownNCSC-2026-0256 [1.00] [M/H] Vulnerabilities fixed in Oracle Communicationsncsc-nl
- high[NEW] [high] Oracle Financial Services Applications: Multiple vulnerabilitiescert-bund
- high[NEW] [high] Oracle Construction and Engineering: Multiple vulnerabilitiescert-bund
- high[NEW] [high] Oracle SQL Developer: Multiple vulnerabilitiescert-bund
Recent advisories for Apache Kafka
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] Apache Kafka: Vulnerability allows information disclosurecert-bund · 2026-08-13
- medium[UPDATE] [medium] Apache Kafka: Vulnerability enables denial of servicecert-bund · 2026-08-12
- mediumCVE-2026-49098: Improper Input Validation, Improper Neutralization of Special Elements in Output Used by a Dow…nvd · 2026-07-06
- mediumGHSA-53w6-v7cv-fc9h: Spring for Apache Kafka: Improper Validation of Retry Topic Header Values Leads to Retry …ghsa · 2026-06-10
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