CVE-2026-16308 IBM CVE debrief

Who should care

Defenders responsible for Quarkus REST deployments should assess potential exposure and prioritize verifying and mitigating denial-of-service risks.

Why it matters

Defenders should prioritize verifying exposure and assessing potential denial-of-service risks in Quarkus REST deployments due to unbounded accumulation of multipart MIME part-header bytes.

• Denial-of-service risk in Quarkus REST deployments
• Potential for remote attackers to exploit unbounded accumulation of multipart MIME part-header bytes

Technical summary

IBM Enterprise Build of Quarkus 3.27.1 through 3.27.4.SP2, and 3.33.1 through 3.33.2.SP2 Quarkus REST could allow a remote attacker to cause a denial of service due to unbounded accumulation of multipart MIME part-header bytes. This vulnerability affects Quarkus REST deployments and can lead to a denial-of-service condition if not properly mitigated. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity. Defenders should prioritize verifying exposure and assessing potential denial-of-service risks in Quarkus REST deployments.

Defensive priority

Defenders should prioritize verifying exposure and assessing potential denial-of-service risks in Quarkus REST deployments.

Recommended defensive actions

• Verify Quarkus REST deployments for potential exposure to denial-of-service risks
• Assess and prioritize patching or mitigating unbounded accumulation of multipart MIME part-header bytes
• Monitor for potential exploitation attempts

Evidence notes

The CVE record and NVD entry provide details on the potential denial-of-service vulnerability in IBM Enterprise Build of Quarkus. The CVE record was published on 2026-07-30T15:16:26.910Z and has not been modified since then. The NVD entry provides additional information on the vulnerability, including its CVSS score and severity. Defenders should verify the affected scope and severity of the vulnerability and review the supplied official advisory or CVE record to validate affected

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.