# CVE-2025-48989: Apache Tomcat denial of service in HTTP/2 via MadeYouReset

Source: https://junglewise.ai/threats/cve-2025-48989-apache-tomcat-denial-of-service-in-http-2-via-madeyoureset  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-08-13. Updated: 2026-05-13  
License: CC BY 4.0 with a link back

CVE-2025-48989 · Severity: high · CVSS 7.5 · Published 2025-08-13

Apache Tomcat, a widely used web server and application container, is vulnerable to a denial-of-service condition. An attacker can exploit a flaw in how the server handles and releases resources to trigger a 'made you reset' attack. This could lead to service instability or unavailability, potentially disrupting business operations and customer access to web applications.

Technologies: [Apache Tomcat](https://junglewise.ai/threats/technologies/tomcat), [org.apache.tomcat:tomcat-coyote (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-tomcat-coyote), [org.apache.tomcat.embed:tomcat-embed-core (Maven)](https://junglewise.ai/threats/technologies/org-apache-tomcat-embed-tomcat-embed-core), [Siemens SIMATIC CN 4100](https://junglewise.ai/threats/technologies/simatic-cn-4100). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache), [Maven](https://junglewise.ai/threats/vendors/maven), [Siemens](https://junglewise.ai/threats/vendors/siemens).

## Quick answers

**Is CVE-2025-48989 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-48989 being exploited in the wild.

**How severe is CVE-2025-48989?** High severity, with a CVSS score of 7.5, published 13 August 2025.

**Which products and versions are affected?** Apache Tomcat 11.0.0-M1 through 11.0.9, 10.1.0-M1 through 10.1.43, 9.0.0.M1 through 9.0.107, 8.5.0 through 8.5.100; org.apache.tomcat:tomcat-coyote (Maven) ECOSYSTEM:introduced=11.0.0-M1,fixed=11.0.10; org.apache.tomcat.embed:tomcat-embed-core (Maven) ECOSYSTEM:introduced=11.0.0-M1,fixed=11.0.10; Siemens SIMATIC CN 4100 All versions < V5.0.

**Is there a fix for CVE-2025-48989?** Yes. org.apache.tomcat:tomcat-coyote (Maven): upgrade to 11.0.10 or later; org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 11.0.10 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2025-48989 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2025-48989?** Check whether you run Apache Tomcat, org.apache.tomcat:tomcat-coyote (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven) or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.apache.tomcat:tomcat-coyote (Maven): upgrade to 11.0.10 or later

  ```sh
  # set org.apache.tomcat:tomcat-coyote to 11.0.10 in your pom.xml or build.gradle
  ```

- org.apache.tomcat.embed:tomcat-embed-core (Maven): upgrade to 11.0.10 or later

  ```sh
  # set org.apache.tomcat.embed:tomcat-embed-core to 11.0.10 in your pom.xml or build.gradle
  ```


## Technical details

A vulnerability classified as CWE-404 (Improper Resource Shutdown or Release) exists in Apache Tomcat's Coyote connector. The root cause is a failure to correctly release or shut down resources before they are made available for reuse. A remote, unauthenticated attacker can exploit this over the network to trigger a 'made you reset' attack, leading to a denial-of-service (DoS) condition by exhausting or mismanaging available resources. The issue is fixed in versions 11.0.10, 10.1.44, and 9.0.108.

## Affected products

- Apache Tomcat 11.0.0-M1 to 11.0.9, 10.1.0-M1 to 10.1.43, 9.0.0.M1 to 9.0.107

## Identifiers

- CVE-2025-48989
- GHSA-gqp3-2cvr-x8m3

## Timeline

- 2025-08-13: disclosed
- 2025-08-13: advisory

## References

- [https://api.github.com/users/snieguu](https://api.github.com/users/snieguu)
- [https://github.com/snieguu](https://github.com/snieguu)
- [https://api.github.com/users/snieguu/gists%7B/gist_id%7D](https://api.github.com/users/snieguu/gists%7B/gist_id%7D)
- [https://api.github.com/users/snieguu/repos](https://api.github.com/users/snieguu/repos)
- [https://avatars.githubusercontent.com/u/6084074?v=4](https://avatars.githubusercontent.com/u/6084074?v=4)
- [https://api.github.com/users/snieguu/events%7B/privacy%7D](https://api.github.com/users/snieguu/events%7B/privacy%7D)

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