CVE-2026-93491
highA flaw was found in Netty's HttpServerCodec.
A flaw was found in Netty's HttpServerCodec. A remote, unauthenticated attacker can exploit this vulnerability by pipelining HTTP/1.1 requests on a single connection and withholding reads. This action causes the methodOverflowQueue to grow without limit, leading to unbounded heap memory consumption and a denial of service due to memory exhaustion.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (secalert@redhat.com)
Timeline (UTC)
Published: 2026-09-18 13:18
Modified: 2026-10-15 17:17
NVD status: Awaiting Analysis
Last synced 2 days ago
Verified against the source API 2026-10-27 06:54 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://access.redhat.com/errata/RHSA-2026:69440 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:69470 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:70257 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:83612 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-93491 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2536891 secalert@redhat.com
- https://github.com/netty/netty/releases/tag/netty-4.1.138.Final secalert@redhat.com
- https://github.com/netty/netty/releases/tag/netty-4.2.18.Final secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:54 UTC · record ↗