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.

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.

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

Q: 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.

Q: How is CVE-2025-48989 attacked?

It is attacked over the network, in a software library.

Q: 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.

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, org.apache.tomcat:tomcat-coyote (Maven), org.apache.tomcat.embed:tomcat-embed-core (Maven), Siemens SIMATIC CN 4100. Vendors: Apache, Maven, 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

# 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

# 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

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.