CVE-2026-24733
Apache Tomcat: Security constraint bypass with HTTP/0.9
02 Description
Apache Tomcat: Security constraint bypass with HTTP/0.9
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.55% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 45.9% of scored records. A rank, not a probability.
- NVD base score
- 3.7 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-02-17 18:50Z8 MO AGO
- Last updated
- 2026-03-11 15:19Z7 MO AGO
- Reserved
- 2026-01-26
- Assigning CNA
- apache
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.2
- Document digest
- a443e4115f6b9698ca4a59403ac156631ffe271972626066d7e40a13e17b7dff
05 Affected products
06 References
- lists.apache.orghttps://lists.apache.org/thread/6xk3t65qpn1myp618krtfotbjn1qt90f
07 Fixed in
AlmaLinux 8
- tomcat Fixed in 1:9.0.120-1.el8_10
- tomcat-admin-webapps Fixed in 1:9.0.120-1.el8_10
- tomcat-docs-webapp Fixed in 1:9.0.120-1.el8_10
- tomcat-el-3.0-api Fixed in 1:9.0.120-1.el8_10
- tomcat-jsp-2.3-api Fixed in 1:9.0.120-1.el8_10
- tomcat-lib Fixed in 1:9.0.120-1.el8_10
- tomcat-servlet-4.0-api Fixed in 1:9.0.120-1.el8_10
- tomcat-webapps Fixed in 1:9.0.120-1.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- tomcat Fixed in 1:9.0.117-1.el9_8
- tomcat-admin-webapps Fixed in 1:9.0.117-1.el9_8
- tomcat-docs-webapp Fixed in 1:9.0.117-1.el9_8
- tomcat-el-3.0-api Fixed in 1:9.0.117-1.el9_8
- tomcat-jsp-2.3-api Fixed in 1:9.0.117-1.el9_8
- tomcat-lib Fixed in 1:9.0.117-1.el9_8
- tomcat-servlet-4.0-api Fixed in 1:9.0.117-1.el9_8
- tomcat-webapps Fixed in 1:9.0.117-1.el9_8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- tomcat9 Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-admin-webapps Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-docs-webapp Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-el-3.0-api Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-jsp-2.3-api Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-lib Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-servlet-4.0-api Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-webapps Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- tomcat Fixed in 1:9.0.120-1.el8_10
- tomcat-admin-webapps Fixed in 1:9.0.120-1.el8_10
- tomcat-docs-webapp Fixed in 1:9.0.120-1.el8_10
- tomcat-el-3.0-api Fixed in 1:9.0.120-1.el8_10
- tomcat-jsp-2.3-api Fixed in 1:9.0.120-1.el8_10
- tomcat-lib Fixed in 1:9.0.120-1.el8_10
- tomcat-servlet-4.0-api Fixed in 1:9.0.120-1.el8_10
- tomcat-webapps Fixed in 1:9.0.120-1.el8_10
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- tomcat Fixed in 1:9.0.117-1.el9_8
- tomcat-admin-webapps Fixed in 1:9.0.117-1.el9_8
- tomcat-docs-webapp Fixed in 1:9.0.117-1.el9_8
- tomcat-el-3.0-api Fixed in 1:9.0.117-1.el9_8
- tomcat-jsp-2.3-api Fixed in 1:9.0.117-1.el9_8
- tomcat-lib Fixed in 1:9.0.117-1.el9_8
- tomcat-servlet-4.0-api Fixed in 1:9.0.117-1.el9_8
- tomcat-webapps Fixed in 1:9.0.117-1.el9_8
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 10
- tomcat9 Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-admin-webapps Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-docs-webapp Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-el-3.0-api Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-jsp-2.3-api Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-lib Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-servlet-4.0-api Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
- tomcat9-webapps Fixed
A version is affected if any line below covers it.
- Affected before 1:9.0.117-1.el10_2.alma.1
- Affected before 1:9.0.117-2.el10_2.alma.1
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- tomcat10 Fixed in 10.1.52-1~deb12u1
- tomcat9 Fixed in 9.0.70-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- tomcat10 Fixed in 10.1.52-1~deb13u1
- tomcat11 Fixed in 11.0.15-1~deb13u1
- tomcat9 Fixed in 9.0.70-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- tomcat10 Fixed in 10.1.52-1
- tomcat11 Fixed in 11.0.15-1
- tomcat9 Fixed in 9.0.70-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- tomcat10 No fix yet
- tomcat9 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- tomcat10 No fix yet
- tomcat11 No fix yet
- tomcat9 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- tomcat10 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- tomcat6 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- tomcat9 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- tomcat9 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 22.04 LTS
- tomcat9 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.