CVE-2025-53506
Detail
Modified After Enrichment
This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Current Description
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 through 8.5.100. Other EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
View Analysis Description
Analysis
Description
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0 Severity and Vector Strings:
Base
Score:
NVD assessment
not yet provided.
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Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
|
CWE-400
|
Uncontrolled Resource Consumption |
Apache Software Foundation
|
Change History
10 change records found show changes
CVE Modified by CISA-ADP
6/17/2026 5:38:20 AM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2025-07-11T13:46:01.043076Z","id":"CVE-2025-53506","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by Apache Software Foundation
6/17/2026 5:38:20 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"Apache Software Foundation","product":"Apache Tomcat","defaultStatus":"unaffected","versions":[{"version":"11.0.0-M1","lessThanOrEqual":"11.0.8","versionType":"semver","status":"affected"},{"version":"10.1.0-M1","lessThanOrEqual":"10.1.42","versionType":"semver","status":"affected"},{"version":"9.0.0.M1","lessThanOrEqual":"9.0.106","versionType":"semver","status":"affected"},{"version":"8.5.0","lessThanOrEqual":"8.5.100","versionType":"semver","status":"affected"},{"version":"10.0.0-M1","lessThanOrEqual":"10.0.27","versionType":"semver","status":"unknown"}]}]
|
CVE Modified by CVE
11/04/2025 5:16:21 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
http://www.openwall.com/lists/oss-security/2025/07/10/13
|
CVE Modified by CVE
11/03/2025 3:19:13 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
|
CVE Modified by Apache Software Foundation
10/29/2025 8:15:37 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
Description |
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 through 8.5.100.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
|
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 through 8.5.100. Other EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
|
CVE Modified by Apache Software Foundation
8/08/2025 9:15:29 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
Description |
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. Older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
|
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
The following versions were EOL at the time the CVE was created but are
known to be affected: 8.5.0 through 8.5.100.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
|
CVE Modified by Apache Software Foundation
8/07/2025 8:15:31 AM
| Action |
Type |
Old Value |
New Value |
| Changed |
Description |
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
|
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. Older, EOL versions may also be affected.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
|
Initial Analysis by NIST
7/29/2025 2:35:46 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
OR
*cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (including) 10.1.42
*cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 11.0.0 up to (including) 11.0.8
*cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (including) 9.0.106
|
| Added |
Reference Type |
Apache Software Foundation: https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0 Types: Issue Tracking, Mailing List, Vendor Advisory
|
CVE Modified by CISA-ADP
7/11/2025 10:15:28 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
|
New CVE Received from Apache Software Foundation
7/10/2025 4:15:26 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Description |
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106.
Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.
|
| Added |
CWE |
CWE-400
|
| Added |
Reference |
https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0
|
Quick Info
CVE Dictionary Entry: CVE-2025-53506 NVD
Published Date: 07/10/2025 NVD
Last Modified: 06/17/2026
Source: Apache Software Foundation
|
