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CVE-2025-31650

HIGHCVSS 7.5/10EPSS 66.36%

Last modified

CVE-2025-31650 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 66.36% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
66.36%

99.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
ApacheTomcat>= 9.0.76, < 9.0.104—
ApacheTomcat>= 10.1.10, < 10.1.40—
ApacheTomcat>= 11.0.1, < 11.0.6—
ApacheTomcat11.0.0Milestone10

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2025-31650?
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.
How severe is CVE-2025-31650?
CVE-2025-31650 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 66.36% probability of exploitation in the next 30 days.
How do I fix CVE-2025-31650?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-31650?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST