CVE-2026-93574

A flaw was found in Netty's `netty-codec-http` component. A remote attacker could exploit this vulnerability by sending a specially crafted HTTP/1.1 chunk-size token that includes post-digit whitespace. This incorrect parsing of the chunk size can lead to HTTP request smuggling. This allows an attacker to bypass security controls or access unauthorized resources in proxy/backend deployments.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS

1.4% chance of exploitation in the next 30 days; higher than 71% of CVEs (scores of 2026-10-25)

CWE

CWE-444

Published

2026-09-18

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

References

• https://access.redhat.com/errata/RHSA-2026:69440
• https://access.redhat.com/errata/RHSA-2026:69470
• https://access.redhat.com/errata/RHSA-2026:83612
• https://access.redhat.com/security/cve/CVE-2026-93574
• https://bugzilla.redhat.com/show_bug.cgi?id=2536966

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