Apache Tomcat up to 8.5.100/9.0.107/10.1.43/11.0.9 HTTP/2 denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Apache Tomcat up to 8.5.100/9.0.107/10.1.43/11.0.9. The impacted element is an unknown function of the component HTTP2 Handler. This manipulation causes denial of service. This vulnerability only affects products that are no longer supported by the maintainer. The identification of this vulnerability is CVE-2025-48989. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Apache Tomcat up to 8.5.100/9.0.107/10.1.43/11.0.9 and classified as problematic. Affected by this vulnerability is some unknown functionality of the component HTTP2 Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

Improper Resource Shutdown or Release vulnerability in Apache Tomcat made Tomcat vulnerable to the made you reset attack. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.9, from 10.1.0-M1 through 10.1.43 and from 9.0.0.M1 through 9.0.107. Older, EOL versions may also be affected. Users are recommended to upgrade to one of versions 11.0.10, 10.1.44 or 9.0.108 which fix the issue.

The weakness was shared by Gal Bar Nahum, Anat Bremler-Barr and Yaniv Harel. The advisory is shared at lists.apache.org. This vulnerability is known as CVE-2025-48989 since 05/29/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 249345 (RHEL 10 / 8 / 9 : Red Hat JBoss Web Server 6.1.2 (RHSA-2025:13685)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (249345), EUVD (EUVD-2025-24559) and CERT Bund (WID-SEC-2025-1830). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Apache Tomcat
  • Debian Linux
  • Amazon Linux 2
  • IBM Power Hardware Management Console
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Open Source lighttpd
  • SUSE Linux
  • Red Hat JBoss Enterprise Application Platform
  • Oracle Linux
  • IBM Operational Decision Manager
  • NetApp ActiveIQ Unified Manager
  • IBM Security Guardium
  • IBM QRadar SIEM
  • SUSE openSUSE
  • Specification http/2
  • RESF Rocky Linux
  • Xerox FreeFlow Print Server
  • Red Hat Integration
  • IBM InfoSphere Information Server
  • ATOSS Staff Efficiency Suite
  • Open Source Varnish HTTP Cache
  • Red Hat JBoss Web Server
  • Eclipse Jetty
  • Open Source Camunda
  • RealObjects PDFreactor
  • IBM Integration Bus
  • HCL Commerce
  • Atlassian Bamboo
  • Atlassian Jira
  • IBM Storage Scale
  • Dell Secure Connect Gateway
  • Atlassian Bitbucket
  • Dell NetWorker

Productinfo

Type

Vendor

Name

Version

License

Support

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 249345
Nessus Name: RHEL 10 / 8 / 9 : Red Hat JBoss Web Server 6.1.2 (RHSA-2025:13685)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/29/2025 CVE reserved
08/13/2025 +76 days Advisory disclosed
08/13/2025 +0 days VulDB entry created
01/21/2026 +161 days VulDB entry last update

Sourcesinfo

Vendor: apache.org

Advisory: lists.apache.org
Researcher: Gal Bar Nahum, Anat Bremler-Barr, Yaniv Harel
Status: Confirmed

CVE: CVE-2025-48989 (🔒)
GCVE (CVE): GCVE-0-2025-48989
GCVE (VulDB): GCVE-100-319909
EUVD: 🔒
CERT Bund: WID-SEC-2025-1830 - http/2 Implementierungen: Schwachstelle ermöglicht Denial of Service

Entryinfo

Created: 08/13/2025 15:14
Updated: 01/21/2026 09:46
Changes: 08/13/2025 15:14 (57), 08/13/2025 15:23 (1), 08/15/2025 05:25 (7), 08/15/2025 05:46 (2), 08/18/2025 12:40 (1), 08/19/2025 01:09 (1), 08/21/2025 13:14 (1), 09/07/2025 22:54 (1), 09/14/2025 07:20 (1), 10/12/2025 23:21 (1), 12/04/2025 14:56 (1), 01/21/2026 09:46 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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