CVE-2026-93491

Impact

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.

Affected packages

This record carries no package version data, so it cannot be matched against a dependency list automatically. Read the advisory and compare your version by hand.

Weakness classification

References

• NVD record
• CVE.org record
• https://access.redhat.com/errata/RHSA-2026:69440
• https://access.redhat.com/errata/RHSA-2026:69470
• https://access.redhat.com/errata/RHSA-2026:70257
• https://access.redhat.com/errata/RHSA-2026:83612
• https://access.redhat.com/security/cve/CVE-2026-93491
• https://bugzilla.redhat.com/show_bug.cgi?id=2536891
• https://github.com/netty/netty/releases/tag/netty-4.1.138.Final
• https://github.com/netty/netty/releases/tag/netty-4.2.18.Final