CVE-2025-53506

Published Jul 10, 2025

Last updated 4 months ago

Overview

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.
Source
security@apache.org
NVD status
Modified
Products
tomcat

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.5
Impact score
3.6
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity
HIGH

Weaknesses

security@apache.org
CWE-400

Social media

Hype score
Not currently trending
  1. A CVE-2025-53506 é uma falha de Uncontrolled Resource Consumption (CWE-400) no Apache Tomcat, explorando o protocolo HTTP/2. Quando um cliente HTTP/2 não reconhece o SETTINGS ACK, o servidor Tomcat falha ao limitar o número de “streams”, podendo ser sobrecarregado com cone

    @Andrewkek77

    19 Jul 2025

    36 Impressions

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  2. CVE-2025-53506: Uncontrolled Resource Consumption in Apache Tomcat, 7.5 rating❗️ A vulnerability in some versions of Apache Tomcat could allow an attacker to cause a DoS. Search at https://t.co/hv7QKSqxTR: 👉 Link: https://t.co/xEmxg41hho #cybersecurity #vulnerability_ma

    @Netlas_io

    16 Jul 2025

    59 Impressions

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  3. ⚠️Vulnerabilidades en Apache Tomcat y HTTP Server ❗CVE-2025-53506 ❗CVE-2025-52434 ❗CVE-2025-52520 ➡️Más info: https://t.co/U9MhlJDNxE https://t.co/nKJdkYnXTS

    @CERTpy

    14 Jul 2025

    135 Impressions

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  4. CVE-2025-53506 Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted… https://t.co/9XtjddIqz0

    @CVEnew

    11 Jul 2025

    213 Impressions

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  5. Tomcat CVE-2025-53506 DoSの脆弱性の世界一早い解説記事を書きました。他にも2つの脆弱性が修正されているので皆様アップデートしましょう。 https://t.co/kQixehOQoB

    @kinyuka

    11 Jul 2025

    3908 Impressions

    13 Retweets

    39 Likes

    16 Bookmarks

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  6. Warning: Multiple vulnerabilities in @TheApacheTomcat can lead to Denial of Service attacks. CVE-2025-52434, CVE-2025-52520, CVE-2025-53506 with CVSS 6.6 demand urgent action. Protect your systems now! Read the advisory https://t.co/I7TVCH9xgC #Patch immediately! #Vulnerability

    @CCBalert

    7 Jul 2025

    90 Impressions

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    2 Quotes

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