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.
Urgent
CVSS
9.1
critical
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0048
41st percentile
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
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| jws7-mod_cluster · RHEL 10 | 2.1.1-1.Final_redhat_00001.1.el10jws | RHSA-2026:93618 | Sep 23, 2026 |
| jws7-tomcat · RHEL 10 | 11.0.21-10.redhat_00010.1.el10jws | RHSA-2026:93618 | Sep 23, 2026 |
| jws7-tomcat-native · RHEL 10 | 1.3.7-4.redhat_4.el10jws | RHSA-2026:93618 | Sep 23, 2026 |
| libtcnative-1-0 · opensuse-leap 16.0 | 1.3.9-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| libtcnative-1-0 · sles 15.6 | 1.3.9-150600.16.9.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| libtcnative-1-0 · sles 15.7 | 1.3.9-150600.16.9.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| libtcnative-1-0 · sles 16.0 | 1.3.9-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| libtcnative-2-0 · opensuse-leap 16.0 | 2.0.16-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| libtcnative-2-0 · sles 16.0 | 2.0.16-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat · opensuse-leap 16.0 | 9.0.122-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| tomcat · sles 15.6 | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat · sles 15.7 | 9.0.122-150200.123.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat · sles 16.0 | 9.0.122-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat10 · Debian 14 | 10.1.60-1 | DEBIAN-CVE-2026-86350 | Sep 24, 2026 |
| tomcat10 · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10 · opensuse-leap 16.0 | 10.1.60-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| tomcat10 · sles 15.6 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat10 · sles 15.7 | 10.1.60-150200.5.82.2 | SUSE-SU-2026:4546-1 | Oct 6, 2026 |
| tomcat10 · sles 16.0 | 10.1.60-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat10-admin-webapps · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-docs-webapp · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-el-5.0-api · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-jsp-3.1-api · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-lib · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-servlet-6.0-api · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat10-webapps · amzn 2023 | 1:10.1.60-1.amzn2023.0.1 | ALAS2023-2026-3165 | Nov 7, 2026 |
| tomcat11 · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11 · opensuse-leap 16.0 | 11.0.26-160000.1.1 | OPENSUSE-SU-2026:21984-1 | Sep 30, 2026 |
| tomcat11 · sles 15.6 | 11.0.26-150600.13.36.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| tomcat11 · sles 15.7 | 11.0.26-150600.13.36.2 | SUSE-SU-2026:4544-1 | Oct 6, 2026 |
| tomcat11 · sles 16.0 | 11.0.26-160000.1.1 | SUSE-SU-2026:23985-1 | Sep 30, 2026 |
| tomcat11-admin-webapps · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-docs-webapp · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-el-6.0-api · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-jsp-4.0-api · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-lib · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-servlet-6.1-api · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat11-webapps · amzn 2023 | 1:11.0.26-1.amzn2023.0.1 | ALAS2023-2026-3151 | Nov 7, 2026 |
| tomcat9 · Debian 12.15 (bookworm) | 9.0.70-2 | DEBIAN-CVE-2026-86350 | Sep 24, 2026 |
| tomcat9 · Debian 13.5 (trixie) | 9.0.70-2 | DEBIAN-CVE-2026-86350 | Sep 24, 2026 |
| tomcat9 · Debian 14 | 9.0.70-2 | DEBIAN-CVE-2026-86350 | Sep 24, 2026 |
| tomcat9 · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-admin-webapps · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-docs-webapp · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-el-3.0-api · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-jsp-2.3-api · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-lib · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-servlet-4.0-api · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
| tomcat9-webapps · amzn 2023 | 1:9.0.122-1.amzn2023.0.1 | ALAS2023-2026-3166 | Nov 7, 2026 |
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