# CVE-2026-93565: Io.netty/netty-codec-http: netty rtspdecoder method-token smuggling via trailing control byte Status: published. Published: 2026-09-18. Updated: 2026-11-06. A flaw was found in Netty RtspDecoder. The `RtspMethods.valueOf()` function incorrectly strips trailing control bytes from method tokens in Real-Time Streaming Protocol (RTSP) requests. A remote attacker can exploit this by sending a specially crafted RTSP request, leading to method-token smuggling. This vulnerability allows an attacker to bypass method-based access controls and can also be used to launder malicious requests through Netty-based RTSP proxies, making them appear legitimate to backend systems. ## Remediation - workaround: See https://github.com/netty/netty/security/advisories/GHSA-h75q-xqrh-59rf for fixed versions and remediation guidance. (source: CNA: redhat) ## Affected products and versions - Red Hat / Red Hat Build of Apache Camel 3.33.3.SP2 (io.netty/netty-codec-http): ≥ 4.1.138.Final-redhat-00001; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat Build of Debezium 3.6 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.4 (rhbk/keycloak-operator-bundle): ≥ 26.4.17-2; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.4 (rhbk/keycloak-rhel9): ≥ 26.4-29; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.4 (rhbk/keycloak-rhel9-operator): ≥ 26.4-30; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.4.17 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.6 (rhbk/keycloak-operator-bundle): ≥ 26.6.8-2; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.6 (rhbk/keycloak-rhel9): ≥ 26.6-24; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.6 (rhbk/keycloak-rhel9-operator): ≥ 26.6-24; < * (unaffected, rpm). Source: CNA: redhat - Red Hat / Red Hat build of Keycloak 26.6.8 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Quarkus 3.27.5.SP2 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Quarkus 3.33.3.SP2 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 8.1 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat AMQ Broker 7 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat AMQ Clients (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Apache Camel 4 for Quarkus 3 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Apache Camel for Spring Boot 4 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat build of Apicurio Registry 3 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Data Grid 8 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Fuse 7 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat JBoss Enterprise Application Platform 7 (netty-codec-http): Version range not reported. Source: CNA: redhat - Red Hat / Red Hat Single Sign-On 7 (netty-codec-http): Version range not reported. Source: CNA: redhat ## Severity and prioritization - CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N; source: CNA: redhat - CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N; source: NVD: secalert@redhat.com - CISA KEV: No listing in collected sources - EPSS: 0.77% as of 2026-11-06; percentile 55.68% - SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP - Weaknesses: CWE-1035 ## Exploit evidence No exploit evidence in collected sources. This is not proof of no exploitation. ## References - https://access.redhat.com/errata/RHSA-2026:69440 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:69470 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:70257 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:83612 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:95759 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:95760 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:95761 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:95762 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/errata/RHSA-2026:95887 (CNA: redhat; vendor-advisory, x_refsource_REDHAT) - https://access.redhat.com/security/cve/CVE-2026-93565 (CNA: redhat; vdb-entry, x_refsource_REDHAT) - https://bugzilla.redhat.com/show_bug.cgi?id=2536952 (CNA: redhat; issue-tracking, x_refsource_REDHAT) - 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/errata/RHSA-2026:95759 (secalert@redhat.com) - https://access.redhat.com/errata/RHSA-2026:95760 (secalert@redhat.com) - https://access.redhat.com/errata/RHSA-2026:95761 (secalert@redhat.com) - https://access.redhat.com/errata/RHSA-2026:95762 (secalert@redhat.com) - https://access.redhat.com/errata/RHSA-2026:95887 (secalert@redhat.com) - https://access.redhat.com/security/cve/CVE-2026-93565 (secalert@redhat.com) - https://bugzilla.redhat.com/show_bug.cgi?id=2536952 (secalert@redhat.com) ## Provenance - CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-93565; retrieved 2026-11-06; source updated 2026-11-06 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-93565; retrieved 2026-11-06; source updated 2026-11-06 - FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-93565; retrieved 2026-11-06; source updated Not reported Revision: 36a16f0dc3cc7bba10693ecf0c46df1e411a375f3841963b07fea6bdf377a613 Canonical: https://y2.dev/cve/CVE-2026-93565 ## Agent and API access Public CVE pages, Markdown, and JSON are free to read without an account or API key. - Public catalog: https://y2.dev/cve/index.json. 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