# CVE-2026-86350: tomcat9: Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat cau... CVE-2026-86350 is fixed in 30 products on 1 platform, first by RHSA-2026:93618, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2026-86350 - Priority: Urgent - CVSS: 9.1 (critical) - EPSS: 0.0048 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 23, 2026 ## Description Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | jws7-mod_cluster RHEL 10 | 2.1.1-1.Final_redhat_00001.1.el10jws | [RHSA-2026:93618](https://patchblox.com/security/data/fix/linux/rhsa-2026-93618.md) | Sep 23, 2026 | | Linux | jws7-tomcat RHEL 10 | 11.0.21-10.redhat_00010.1.el10jws | [RHSA-2026:93618](https://patchblox.com/security/data/fix/linux/rhsa-2026-93618.md) | Sep 23, 2026 | | Linux | jws7-tomcat-native RHEL 10 | 1.3.7-4.redhat_4.el10jws | [RHSA-2026:93618](https://patchblox.com/security/data/fix/linux/rhsa-2026-93618.md) | Sep 23, 2026 | | Linux | libtcnative-1-0 opensuse-leap 16.0 | 1.3.9-160000.1.1 | [OPENSUSE-SU-2026:21984-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21984-1.md) | Sep 30, 2026 | | Linux | libtcnative-1-0 sles 15.6 | 1.3.9-150600.16.9.2 | [SUSE-SU-2026:4544-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4544-1.md) | Oct 6, 2026 | | Linux | libtcnative-1-0 sles 15.7 | 1.3.9-150600.16.9.2 | [SUSE-SU-2026:4544-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4544-1.md) | Oct 6, 2026 | | Linux | libtcnative-1-0 sles 16.0 | 1.3.9-160000.1.1 | [SUSE-SU-2026:23985-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23985-1.md) | Sep 30, 2026 | | Linux | libtcnative-2-0 opensuse-leap 16.0 | 2.0.16-160000.1.1 | [OPENSUSE-SU-2026:21984-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21984-1.md) | Sep 30, 2026 | | Linux | libtcnative-2-0 sles 16.0 | 2.0.16-160000.1.1 | [SUSE-SU-2026:23985-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23985-1.md) | Sep 30, 2026 | | Linux | tomcat opensuse-leap 16.0 | 9.0.122-160000.1.1 | [OPENSUSE-SU-2026:21984-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21984-1.md) | Sep 30, 2026 | | Linux | tomcat sles 15.6 | 9.0.122-150200.123.2 | [SUSE-SU-2026:4546-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4546-1.md) | Oct 6, 2026 | | Linux | tomcat sles 15.7 | 9.0.122-150200.123.2 | [SUSE-SU-2026:4546-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4546-1.md) | Oct 6, 2026 | | Linux | tomcat sles 16.0 | 9.0.122-160000.1.1 | [SUSE-SU-2026:23985-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23985-1.md) | Sep 30, 2026 | | Linux | tomcat10 Debian 14 | 10.1.60-1 | [DEBIAN-CVE-2026-86350](https://patchblox.com/security/data/fix/linux/debian-cve-2026-86350.md) | Sep 24, 2026 | | Linux | tomcat10 amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat10 opensuse-leap 16.0 | 10.1.60-160000.1.1 | [OPENSUSE-SU-2026:21984-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21984-1.md) | Sep 30, 2026 | | Linux | tomcat10 sles 15.6 | 10.1.60-150200.5.82.2 | [SUSE-SU-2026:4546-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4546-1.md) | Oct 6, 2026 | | Linux | tomcat10 sles 15.7 | 10.1.60-150200.5.82.2 | [SUSE-SU-2026:4546-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4546-1.md) | Oct 6, 2026 | | Linux | tomcat10 sles 16.0 | 10.1.60-160000.1.1 | [SUSE-SU-2026:23985-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23985-1.md) | Sep 30, 2026 | | Linux | tomcat10-admin-webapps amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat10-docs-webapp amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat10-el-5.0-api amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat10-jsp-3.1-api amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat10-lib amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat10-servlet-6.0-api amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat10-webapps amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | [ALAS2023-2026-3165](https://patchblox.com/security/data/fix/linux/alas2023-2026-3165.md) | Nov 7, 2026 | | Linux | tomcat11 amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat11 opensuse-leap 16.0 | 11.0.26-160000.1.1 | [OPENSUSE-SU-2026:21984-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21984-1.md) | Sep 30, 2026 | | Linux | tomcat11 sles 15.6 | 11.0.26-150600.13.36.2 | [SUSE-SU-2026:4544-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4544-1.md) | Oct 6, 2026 | | Linux | tomcat11 sles 15.7 | 11.0.26-150600.13.36.2 | [SUSE-SU-2026:4544-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4544-1.md) | Oct 6, 2026 | | Linux | tomcat11 sles 16.0 | 11.0.26-160000.1.1 | [SUSE-SU-2026:23985-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23985-1.md) | Sep 30, 2026 | | Linux | tomcat11-admin-webapps amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat11-docs-webapp amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat11-el-6.0-api amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat11-jsp-4.0-api amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat11-lib amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat11-servlet-6.1-api amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat11-webapps amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | [ALAS2023-2026-3151](https://patchblox.com/security/data/fix/linux/alas2023-2026-3151.md) | Nov 7, 2026 | | Linux | tomcat9 Debian 12.15 (bookworm) | 9.0.70-2 | [DEBIAN-CVE-2026-86350](https://patchblox.com/security/data/fix/linux/debian-cve-2026-86350.md) | Sep 24, 2026 | | Linux | tomcat9 Debian 13.5 (trixie) | 9.0.70-2 | [DEBIAN-CVE-2026-86350](https://patchblox.com/security/data/fix/linux/debian-cve-2026-86350.md) | Sep 24, 2026 | | Linux | tomcat9 Debian 14 | 9.0.70-2 | [DEBIAN-CVE-2026-86350](https://patchblox.com/security/data/fix/linux/debian-cve-2026-86350.md) | Sep 24, 2026 | | Linux | tomcat9 amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | | Linux | tomcat9-admin-webapps amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | | Linux | tomcat9-docs-webapp amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | | Linux | tomcat9-el-3.0-api amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | | Linux | tomcat9-jsp-2.3-api amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | | Linux | tomcat9-lib amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | | Linux | tomcat9-servlet-4.0-api amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | | Linux | tomcat9-webapps amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | [ALAS2023-2026-3166](https://patchblox.com/security/data/fix/linux/alas2023-2026-3166.md) | Nov 7, 2026 | --- Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.