Quick answers
- Is CVE-2026-16308 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-16308 being exploited in the wild.
- How severe is CVE-2026-16308?
- High severity, with a CVSS score of 7.5, published 30 July 2026.
- Which products and versions are affected?
- IBM Enterprise Build of Quarkus 3.27.1 - 3.27.4.SP2, 3.33.1 - 3.33.2.SP2.
- Is there a fix for CVE-2026-16308?
- A patch was published on 2026-07-30. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-16308 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-16308?
- Check whether you run IBM Enterprise Build of Quarkus at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A denial of service vulnerability exists in the Quarkus REST component of IBM Enterprise Build of Quarkus. The flaw is categorized as CWE-770 (Allocation of Resources Without Limits or Throttling) and stems from the unbounded accumulation of multipart MIME part-header bytes. A remote, unauthenticated attacker can exploit this by sending a malicious multipart request with excessively large or numerous headers, leading to memory exhaustion. The vulnerability is addressed in versions 3.27.4.SP3 and 3.33.2.SP3.
Affected products
- IBM Enterprise Build of Quarkus 3.27.1 - 3.27.4.SP2, 3.33.1 - 3.33.2.SP2
Timeline
- 2026-07-30: disclosed
- 2026-07-30: advisory
- 2026-07-30: patched