A flaw was found in Netty's HTTP/2 HpackEncoder. (CVE-2026-93492)
A vulnerability in Netty's HTTP/2 HpackEncoder allows a remote attacker to cause a Denial of Service (DoS) by sending HTTP/2 SETTINGS frames with an excessively large MAX_HEADER_TABLE_SIZE. This leads to increased CPU and memory usage due to the storage of many unique headers.
AI Analysis
Technical Summary
CVE-2026-93492 describes a flaw in Netty's HTTP/2 HpackEncoder where an attacker can exploit the handling of SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE value. This causes the encoder to store an excessive number of unique headers, resulting in elevated CPU and memory consumption and ultimately causing a Denial of Service condition.
Potential Impact
The vulnerability allows remote attackers to trigger a Denial of Service by exhausting system resources (CPU and memory) through crafted HTTP/2 SETTINGS frames. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
A flaw was found in Netty's HTTP/2 HpackEncoder. (CVE-2026-93492)
Description
A vulnerability in Netty's HTTP/2 HpackEncoder allows a remote attacker to cause a Denial of Service (DoS) by sending HTTP/2 SETTINGS frames with an excessively large MAX_HEADER_TABLE_SIZE. This leads to increased CPU and memory usage due to the storage of many unique headers.
CVSS v3.1
Score 5.3medium
Affected software
pkg:deb/ubuntu/netty?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/netty?arch=source&distro=esm-apps-legacy/xenialpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/netty?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/netty?arch=source&distro=esm-apps/noblepkg:deb/ubuntu/netty?arch=source&distro=esm-apps/resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-93492 describes a flaw in Netty's HTTP/2 HpackEncoder where an attacker can exploit the handling of SETTINGS frames with a very large MAX_HEADER_TABLE_SIZE value. This causes the encoder to store an excessive number of unique headers, resulting in elevated CPU and memory consumption and ultimately causing a Denial of Service condition.
Potential Impact
The vulnerability allows remote attackers to trigger a Denial of Service by exhausting system resources (CPU and memory) through crafted HTTP/2 SETTINGS frames. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-93492
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:Pro:26.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab4be2ef7a7c54106eeec2a
Added to database: 09/24/2026, 06:07:42 UTC
Last enriched: 09/24/2026, 06:30:49 UTC
Last updated: 09/25/2026, 02:47:33 UTC
Views: 3
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