CVE-2025-31650
MEDIUM
Apache Tomcat Denial of Service via invalid HTTP priority header
Published April 28, 2025Updated February 4, 2026Source: osv
Summary
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.
Remediation
Upgrade to the fixed version using your package manager.
Maven
Update org.apache.tomcat:tomcat-coyote to 11.0.6 or later<!-- Update pom.xml dependency version to 11.0.6 for org.apache.tomcat:tomcat-coyote -->
Maven
Update org.apache.tomcat:tomcat-coyote to 10.1.40 or later<!-- Update pom.xml dependency version to 10.1.40 for org.apache.tomcat:tomcat-coyote -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 11.0.6 or later<!-- Update pom.xml dependency version to 11.0.6 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 10.1.40 or later<!-- Update pom.xml dependency version to 10.1.40 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat.embed:tomcat-embed-core to 9.0.104 or later<!-- Update pom.xml dependency version to 9.0.104 for org.apache.tomcat.embed:tomcat-embed-core -->
Maven
Update org.apache.tomcat:tomcat-coyote to 9.0.104 or later<!-- Update pom.xml dependency version to 9.0.104 for org.apache.tomcat:tomcat-coyote -->
After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.
Affected Packages (8)
| Package | Ecosystem | Affected | Fixed In |
|---|---|---|---|
| org.apache.tomcat.embed:tomcat-embed-core | maven | 8.5.0, 8.5.100, 8.5.11, 8.5.12 (+81 more) | Range-based data available |
| org.apache.tomcat:tomcat-coyote | maven | 11.0.0, 11.0.0-M10, 11.0.0-M11, 11.0.0-M12 (+24 more) | 11.0.6 |
| org.apache.tomcat:tomcat-coyote | maven | 10.1.10, 10.1.11, 10.1.12, 10.1.13 (+20 more) | 10.1.40 |
| org.apache.tomcat.embed:tomcat-embed-core | maven | 11.0.0, 11.0.0-M10, 11.0.0-M11, 11.0.0-M12 (+24 more) | 11.0.6 |
| org.apache.tomcat.embed:tomcat-embed-core | maven | 10.1.10, 10.1.11, 10.1.12, 10.1.13 (+20 more) | 10.1.40 |
| org.apache.tomcat.embed:tomcat-embed-core | maven | 9.0.100, 9.0.102, 9.0.76, 9.0.78 (+20 more) | 9.0.104 |
| org.apache.tomcat:tomcat-coyote | maven | 9.0.100, 9.0.102, 9.0.76, 9.0.78 (+20 more) | 9.0.104 |
| org.apache.tomcat:tomcat-coyote | maven | 8.5.0, 8.5.100, 8.5.11, 8.5.12 (+81 more) | Range-based data available |
Vulnerability Classification
Common Weakness Enumeration (CWE) identifiers for this vulnerability type.
- CWE-459
- CWE-460
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-31650ADVISORY
- https://github.com/apache/tomcat/commit/1eef1dc459c45f1e421d8bd25ef340fc1cc34edcWEB
- https://github.com/apache/tomcat/commit/40ae788c2e64d018b4e58cd4210bb96434d0100dWEB
- https://github.com/apache/tomcat/commit/75554da2fc5574862510ae6f0d7b3d78937f1d40WEB
- https://github.com/apache/tomcat/commit/8cc3b8fb3f2d8d4d6a757e014f19d1fafa948a60WEB
- https://github.com/apache/tomcat/commit/b7674782679e1514a0d154166b1d04d38aaac4a9WEB
- https://github.com/apache/tomcat/commit/b98e74f517b36929f4208506e5adad22cb767baaWEB
- https://github.com/apache/tomcat/commit/cba1a0fe1289ee7f5dd46c61c38d1e1ac5437bffWEB
- https://github.com/apache/tomcat/commit/ded0285b96b4d3f5560dfc8856ad5ec4a9b50ba9WEB
- https://github.com/apache/tomcat/commit/f619e6a05029538886d5a9d987925d573b5bb8c2WEB
- https://github.com/apache/tomcatPACKAGE
- https://lists.apache.org/thread/j6zzk0y3yym9pzfzkq5vcyxzz0yzh826WEB
- https://lists.debian.org/debian-lts-announce/2025/07/msg00009.htmlWEB
- https://tomcat.apache.org/security-10.htmlWEB
- https://tomcat.apache.org/security-11.htmlWEB
- https://tomcat.apache.org/security-9.htmlWEB
- https://www.openwall.com/lists/oss-security/2025/04/28/2WEB
Frequently Asked Questions
- What is CVE-2025-31650?
- Apache Tomcat Denial of Service via invalid HTTP priority header This vulnerability has been assigned a severity rating of MEDIUM (CVSS score: 7.5/10).
- How do I check if my project is affected by CVE-2025-31650?
- CVE-2025-31650 affects org.apache.tomcat.embed:tomcat-embed-core and org.apache.tomcat:tomcat-coyote. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2025-31650 and 200,000+ other known vulnerabilities.
Severity & Exploitability
CVSS Score
7.5
High exploitability or significant impact. Prioritize remediation within days.
Also Known As
GHSA-3p2h-wqq4-wf4h
BIT-tomcat-2025-31650
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