Quick answers
- Is CVE-2026-93492 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-93492 being exploited in the wild.
- How severe is CVE-2026-93492?
- Medium severity, with a CVSS score of 5.3, published 18 September 2026.
- Which products and versions are affected?
- Netty <UNKNOWN>.
- Is there a fix for CVE-2026-93492?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-93492 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-93492?
- Check whether you run Netty 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
The vulnerability exists in Netty's HpackEncoder component within the HTTP/2 protocol handler. An attacker can send HTTP/2 SETTINGS frames with an extremely large MAX_HEADER_TABLE_SIZE value, which causes the encoder to allocate and store excessive memory for header tables. This triggers uncontrolled resource consumption (CPU and memory), leading to a Denial of Service condition. The attack is remotely exploitable over the network without authentication or user interaction required. No patch status is indicated in the available advisory text.
Affected products
- Netty Netty <UNKNOWN>
Timeline
- 2026-09-18: disclosed