Description
Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOfMemoryException resulting in a denial of service.
This issue affects Apache Tomcat: from 9.0.76 through 9.0.102, from 10.1.10 through 10.1.39, from 11.0.0-M2 through 11.0.5.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.90 though 8.5.100.
Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6 which fix the issue.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 9.0.76 – ≤ 9.0.102, 10.1.10 – ≤ 10.1.39, 11.0.0-M2 – ≤ 11.0.5, 8.5.90 – ≤ 8.5.100 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | tomcat10 | 10.1.40-1 | — |
| Debian 14 | tomcat11 | 11.0.6-1 | — |
| Debian 14 | tomcat9 | 9.0.70-2 | — |
| Debian 13 | tomcat10 | 10.1.40-1 | — |
| Debian 13 | tomcat11 | 11.0.6-1 | — |
| Debian 13 | tomcat9 | 9.0.70-2 | — |
| Debian 12 | tomcat10 | 10.1.40-1 | — |
| Debian 12 | tomcat9 | 9.0.70-2 | — |
| Debian 11 | tomcat9 | 9.0.107-0+deb11u1 | DLA-4244-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | tomcat10 | 10.1.16-1ubuntu0.1~esm3 | USN-7705-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | tomcat +7 | 1:10.1.49-1.el10 | RHSA-2026:18537 |
| RHEL 10 | tomcat9 +7 | 1:9.0.87-5.el10_0.1 | RHSA-2025:11332 |
| RHEL 9 | tomcat +7 | 1:9.0.87-3.el9_6.1 | RHSA-2025:11335 |
| RHEL 8 | tomcat +7 | 1:9.0.87-1.el8_10.4 | RHSA-2025:11333 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.4 EUS | tomcat +7 | 1:9.0.87-1.el9_4.4 | RHSA-2025:11334 |
| RHEL 9.2 E4S | tomcat +7 | 1:9.0.87-1.el9_2.4 | RHSA-2025:11381 |
| RHEL 8.8 TUS | tomcat +7 | 1:9.0.87-1.el8_8.5 | RHSA-2025:11382 |
| RHEL 8.8 E4S | tomcat +7 | 1:9.0.87-1.el8_8.5 | RHSA-2025:11382 |
| Red Hat JBoss Web Server 6 | jws6-tomcat +9 | 10.1.36-6.redhat_00007.1.el8jws | RHSA-2025:3608 |
| Red Hat JBoss Web Server 6 | jws6-tomcat-jakartaee-migration | 1.0.6-2.redhat_00003.1.el8jws | RHSA-2025:3608 |
| Red Hat JBoss Web Server 6 | jws6-tomcat-native | 1.3.1-1.redhat_1.el8jws | RHSA-2025:3608 |
| Red Hat JBoss Web Server 5 | jws5-tomcat +11 | 9.0.87-11.redhat_00010.1.el7jws | RHSA-2025:4521 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | tomcat9 +7 | 1:9.0.87-5.el10_0.1 | ALSA-2025:11332 |
| AlmaLinux 9 | tomcat +7 | 1:9.0.87-3.el9_6.1 | ALSA-2025:11335 |
| AlmaLinux 8 | tomcat +7 | 1:9.0.87-1.el8_10.4 | ALSA-2025:11333 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | tomcat9 | 1:9.0.87-5.el10_0.1 | RLSA-2025:11332 |
| Rocky Linux 9 | tomcat | 1:9.0.87-3.el9_6.1 | RLSA-2025:11335 |
| Rocky Linux 8 | tomcat | 1:9.0.87-1.el8_10.4 | RLSA-2025:11333 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:01521-1 |
| SLES 15 SP7 | tomcat10 | 10.1.40-150200.5.40.1 | SUSE-SU-2025:01537-1 |
| SLES 15 SP6 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLES 15 SP6 | tomcat10 | 10.1.40-150200.5.40.1 | SUSE-SU-2025:1537-1 |
| SLES 15 SP5 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLES 15 SP5 | tomcat10 | 10.1.40-150200.5.40.1 | SUSE-SU-2025:1537-1 |
| SLES 15 SP4 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLES 15 SP3 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP5 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLES for SAP 15 SP5 | tomcat10 | 10.1.40-150200.5.40.1 | SUSE-SU-2025:1537-1 |
| SLES for SAP 15 SP4 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLES for SAP 15 SP3 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLE HPC 15 SP5 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLE HPC 15 SP5 | tomcat10 | 10.1.40-150200.5.40.1 | SUSE-SU-2025:1537-1 |
| SLE HPC 15 SP4 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SLE HPC 15 SP3 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SUSE Manager Server 4.3 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| SUSE Enterprise Storage 7.1 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | tomcat | 9.0.104-1.1 | openSUSE-SU-2025:15048-1 |
| openSUSE Tumbleweed | tomcat10 | 10.1.40-1.1 | openSUSE-SU-2025:15049-1 |
| openSUSE Leap 15.6 | tomcat | 9.0.104-150200.81.1 | SUSE-SU-2025:1521-1 |
| openSUSE Leap 15.6 | tomcat10 | 10.1.40-150200.5.40.1 | SUSE-SU-2025:1537-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | tomcat10 +7 | 1:10.1.40-1.amzn2023.0.1 | ALAS2023-2025-965 |
| Amazon Linux 2023 | tomcat9 +7 | 1:9.0.104-1.amzn2023.0.1 | ALAS2023-2025-964 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | tomcat9 +7 | 1:9.0.87-5.el10_0.1 | ELSA-2025-11332 |
| Oracle Linux 9 | tomcat +7 | 1:9.0.87-3.el9_6.1 | ELSA-2025-11335 |
| Oracle Linux 8 | tomcat +7 | 1:9.0.87-1.el8_10.4 | ELSA-2025-11333 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | thingsboard +4 | 4.0.1-r1 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Apache Tomcat 10.1.39 - Denial of Service (DoS) EDB-52318 · remote · Jun 5, 2025
GitHub 6 repositories
-
absholi7ly/TomcatKiller-CVE-2025-31650 ★ 21 · Apr 30, 2025
A tool designed to detect the vulnerability **CVE-2025-31650** in Apache Tomcat (versions 10.1.10 to 10.1.39)
-
tunahantekeoglu/CVE-2025-31650 ★ 2 · Apr 30, 2025
CVE-2025-31650 PoC
-
B1gN0Se/Tomcat-CVE-2025-31650 ★ 0 · Jul 2, 2025
-
obscura-cert/CVE-2025-31650 ★ 0 · Jun 28, 2025
-
assad12341/Dos-exploit- ★ 0 · Jun 13, 2025
CVE-2025-31650
-
sattarbug/Analysis-of-TomcatKiller---CVE-2025-31650-Exploit-Tool ★ 0 · May 2, 2025
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.apache.tomcat:tomcat-coyote | >= 9.0.76, < 9.0.104 | 9.0.104 | GHSA-3p2h-wqq4-wf4h |
| Maven | org.apache.tomcat:tomcat-coyote | >= 10.1.10, < 10.1.40 | 10.1.40 | GHSA-3p2h-wqq4-wf4h |
| Maven | org.apache.tomcat:tomcat-coyote | >= 11.0.0-M2, < 11.0.6 | 11.0.6 | GHSA-3p2h-wqq4-wf4h |
| Maven | org.apache.tomcat:tomcat-coyote | >= 8.5.0, <= 8.5.100 | — | GHSA-3p2h-wqq4-wf4h |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 9.0.76, < 9.0.104 | 9.0.104 | GHSA-3p2h-wqq4-wf4h |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 10.1.10, < 10.1.40 | 10.1.40 | GHSA-3p2h-wqq4-wf4h |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 11.0.0-M2, < 11.0.6 | 11.0.6 | GHSA-3p2h-wqq4-wf4h |
| Maven | org.apache.tomcat.embed:tomcat-embed-core | >= 8.5.0, <= 8.5.100 | — | GHSA-3p2h-wqq4-wf4h |
Advisories 35
- ALSA-2025:11335 Important: tomcat security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:11332 Important: tomcat9 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2025:11333 Important: tomcat security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2025-1439 Dell Secure Connect Gateway: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 11, 2026
- RHSA-2026:18537 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Oct 2, 2026
- RHSA-2025:4521 Red Hat Security Advisory: Red Hat JBoss Web Server 5.8.4 release and security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2025:11381 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2025:11382 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2025:11335 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2025:11333 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2025:11334 Red Hat Security Advisory: tomcat security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2025:11332 Red Hat Security Advisory: tomcat9 security update Red Hat Security Advisories (RHSA) · Sep 28, 2026
- RHSA-2025:3608 Red Hat Security Advisory: Red Hat JBoss Web Server 6.1.0 release and security update Red Hat Security Advisories (RHSA) · Sep 26, 2026
- WID-SEC-2025-0895 Apache Tomcat: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- WID-SEC-2026-0351 Dell NetWorker (Third Party Components): Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 31, 2026
- USN-7705-1 tomcat10 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- openSUSE-SU-2025:15048-1 tomcat-9.0.104-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15049-1 tomcat10-10.1.40-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:01537-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-4244-1 tomcat9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2025:1521-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:01521-1 Security update for tomcat SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:1537-1 Security update for tomcat10 SUSE / openSUSE Security Updates · Feb 4, 2026
- PPSA-2026-001 Pilz: Multiple Vulnerabilities affecting the PIT User Authentication Service CERT@VDE · Feb 2, 2026
- WID-SEC-2025-1365 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 18, 2026
- WID-SEC-2025-1850 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Nov 17, 2025
- RLSA-2025:11332 Important: tomcat9 security update Rocky Linux Security Advisories · Oct 8, 2025
- RLSA-2025:11335 Important: tomcat security update Rocky Linux Security Advisories · Oct 7, 2025
- RLSA-2025:11333 Important: tomcat security update Rocky Linux Security Advisories · Jul 29, 2025
- ELSA-2025-11332 Important: tomcat9 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 17, 2025
- ELSA-2025-11335 Important: tomcat security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 16, 2025
- ELSA-2025-11333 Important: tomcat security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 16, 2025
- WID-SEC-2025-1343 Atlassian Bitbucket: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Jun 17, 2025
- ALAS2023-2025-965 Important: tomcat10 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 13, 2025
- ALAS2023-2025-964 Important: tomcat9 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 13, 2025
References
- https://lists.apache.org/thread/j6zzk0y3yym9pzfzkq5vcyxzz0yzh826 vendor-advisory