Common Weakness Enumeration
CWE-400
DiscouragedUncontrolled Resource Consumption
Abstraction: Class · Status: Draft
The product does not properly control the allocation and maintenance of a limited resource.
5908 vulnerabilities reference this CWE, most recent first.
CVE-2026-54428 (GCVE-0-2026-54428)
Vulnerability from cvelistv5 – Published: 2026-07-01 17:03 – Updated: 2026-07-01 18:15
VLAI
EPSS
VEX
Title
Apache HttpComponents Core: HPackDecoder Unlimited Header List Size Before SETTINGS ACK
Summary
Allocation of resources without limits or throttling in the HTTP/2 HPACK decoder in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending oversized compressed header blocks before the HTTP/2 SETTINGS acknowledgement causes the configured header list size limit to be applied.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 18:15 UTC
CWE
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HttpComponents Core |
Affected:
5.5-alpha , ≤ 5.5-beta1
(maven)
Affected: 5.0-alpha , ≤ 5.4.2 (maven) |
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CVE-2026-54399 (GCVE-0-2026-54399)
Vulnerability from cvelistv5 – Published: 2026-07-01 17:02 – Updated: 2026-07-01 17:36
VLAI
EPSS
VEX
Title
Apache HttpComponents Core: Unbounded HTTP Header/Line Length in Default Configuration
Summary
Uncontrolled Resource Consumption vulnerability in the HTTP/1.1 message parser in Apache HttpComponents Core (5.4.2 and earlier, 5.5-beta1 and earlier) allows an remote attacker to cause a denial of service through memory exhaustion by sending messages with excessive number of headers / excessive header length
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 17:34 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache HttpComponents Core |
Affected:
5.5-alpha , ≤ 5.5-beta1
(maven)
Affected: 5.0-alpha , ≤ 5.4.2 (maven) |
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CVE-2026-54340 (GCVE-0-2026-54340)
Vulnerability from cvelistv5 – Published: 2026-07-16 23:29 – Updated: 2026-07-17 18:06
VLAI
EPSS
VEX
Title
h2o has HTTP/2 state amplification
Summary
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 9265bdd, there is an HTTP/2 state amplification issue that combines HPACK decompression amplification with Slowloris-style stream stalling. Amplified decoded header state can be retained by stalled HTTP/2 streams, and depending on the configuration, additional limits are needed to bound decoded header state and prevent attack. This issue has been fixed by commit 9265bdd.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-17 15:26 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/h2o/h2o/security/advisories/GH… | x_refsource_CONFIRM |
| https://github.com/h2o/h2o/commit/9265bdd9a996ed9… | x_refsource_MISC |
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CVE-2026-54338 (GCVE-0-2026-54338)
Vulnerability from cvelistv5 – Published: 2026-08-07 20:52 – Updated: 2026-08-11 01:15
VLAI
EPSS
VEX
Title
JupyterHub: Unauthenticated Denial of Service via Unbounded Username Logging on Failed Login
Summary
JupyterHub is software that allows users to create a multi-user server for Jupyter notebooks. Prior to 5.5.0, invalid input to form-based login authenticators can place an unbounded attacker-controlled username in failed-login logs, allowing an unauthenticated attacker to consume logging and storage resources. This issue is fixed in version 5.5.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 01:15 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jupyterhub/jupyterhub/security… | x_refsource_CONFIRM |
| https://github.com/jupyterhub/jupyterhub/commit/d… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jupyterhub | jupyterhub |
Affected:
< 5.5.0JupyterHub is software that allows users to create a multi-user server for Jupyter notebooks. Prior to 5.5.0, invalid input to form-based login authenticators can place an unbounded attacker-controlled username in failed-login logs, allowing an unauthenticated attacker to consume logging and storage resources. This issue is fixed in version 5.5.0.
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CVE-2026-54268 (GCVE-0-2026-54268)
Vulnerability from cvelistv5 – Published: 2026-06-22 15:31 – Updated: 2026-06-23 16:09
VLAI
EPSS
VEX
Title
Angular: Denial of Service (DoS) via OOM in Date Formatting (formatDate)
Summary
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.1, 21.2.17, and 20.3.25, a Denial of Service (DoS) vulnerability exists in the @angular/common package of the Angular framework. The formatDate function, which is also utilized by the standard Angular DatePipe, does not properly limit or validate the length of the format parameter. When parsing a maliciously crafted, excessively long date format string (e.g., a repeating pattern or very large string), the internal parser splits the string iteratively using a regular expression loop. This results in uncontrolled resource consumption (high CPU utilization and excessive memory allocations), leading to a Denial of Service (DoS). This vulnerability is fixed in 22.0.1, 21.2.17, and 20.3.25.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 16:07 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/angular/angular/security/advis… | x_refsource_CONFIRM |
| https://github.com/angular/angular/pull/69197 | x_refsource_MISC |
| https://github.com/angular/angular/commit/eeb03f4… | x_refsource_MISC |
Impacted products
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CVE-2026-54260 (GCVE-0-2026-54260)
Vulnerability from cvelistv5 – Published: 2026-07-01 21:08 – Updated: 2026-07-02 15:54
VLAI
EPSS
VEX
Title
Wagtail: Denial of service via unbounded filter specs in the image preview
Summary
Wagtail is an open source content management system built on Django. In versions prior to 7.0.8, 7.3.3 and 7.4.2, an authenticated admin user can trigger expensive rendition processing with purposefully crafted filter specs resulting in potentially service degradation. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. This issue has been fixed in versions 7.0.8, 7.3.3, and 7.4.2.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 15:10 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/wagtail/wagtail/security/advis… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-54092 (GCVE-0-2026-54092)
Vulnerability from cvelistv5 – Published: 2026-06-25 17:41 – Updated: 2026-06-26 02:13
VLAI
EPSS
VEX
Title
File Browser: DoS Vulnerability on Public Login API
Summary
File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.6, unchecked passwords maximums allow for an arbitrarily large password to be passed into the login API. This spikes CPU and memory, and after testing, crashes, heavily lags any container created, and has even made my docker daemon start to send errors with status code 500 even after the container was destroyed. This vulnerability is fixed in 2.63.6.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 02:13 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/filebrowser/filebrowser/securi… | x_refsource_CONFIRM |
| https://github.com/filebrowser/filebrowser/commit… | x_refsource_MISC |
| https://github.com/filebrowser/filebrowser/releas… | x_refsource_MISC |
| https://vincent.vulcoord.net/score/?state=Not+Sco… | exploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| filebrowser | filebrowser |
Affected:
< 2.63.6
|
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CVE-2026-53965 (GCVE-0-2026-53965)
Vulnerability from cvelistv5 – Published: 2026-08-25 20:36 – Updated: 2026-08-26 15:00
VLAI
EPSS
VEX
Title
MCP PHP SDK: Unbounded SSE buffer in HttpTransport enables client-side denial of service
Summary
The MCP PHP SDK (Composer package mcp/sdk) is the official Model Context Protocol SDK for PHP. In versions 0.5.0 through 0.7.0, the HTTP client transport reads a Server-Sent Events response stream incrementally and appends each chunk to an in-memory buffer with no upper bound. The buffer is only flushed when an SSE event delimiter, a double newline, is found, so a remote MCP server that streams response bytes without ever sending the delimiter causes the buffer to grow without limit. A malicious, compromised, or man-in-the-middle-controlled server that the client connects to over the HTTP transport can exploit this to exhaust the client process's memory, triggering a fatal allocation error or OS out-of-memory kill and denying service to the MCP client. The issue affects any client using HttpTransport against an untrusted server endpoint and does not require authentication or user interaction beyond initiating the connection. This issue is fixed in version 0.7.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 14:59 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/modelcontextprotocol/php-sdk/s… | x_refsource_CONFIRM |
| https://github.com/modelcontextprotocol/php-sdk/c… | x_refsource_MISC |
| https://github.com/modelcontextprotocol/php-sdk/r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| modelcontextprotocol | php-sdk |
Affected:
>= 0.5.0, < 0.7.1
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CVE-2026-53596 (GCVE-0-2026-53596)
Vulnerability from cvelistv5 – Published: 2026-07-20 20:17 – Updated: 2026-07-21 16:27
VLAI
EPSS
VEX
Title
FreeScout has unrestricted file upload without rate limiting that leads to resource exhaustion (DoS)
Summary
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.224, the FreeScout helpdesk application does not enforce rate limiting on the file upload endpoint. Any user can flood the server with upload requests, leading to database overload and potential denial of service for all users. Version 1.8.224 contains a fix.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 16:23 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/freescout-help-desk/freescout/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| freescout-help-desk | freescout |
Affected:
< 1.8.224
|
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CVE-2026-53580 (GCVE-0-2026-53580)
Vulnerability from cvelistv5 – Published: 2026-08-27 19:46 – Updated: 2026-08-28 14:55
VLAI
EPSS
VEX
Title
Trilium arbitrary file read and denial of service via file:// URLs in the automatic image-download feature
Summary
Trilium is an open-source hierarchical note-taking application. In versions prior to 0.104.0, the automatic image-download feature accepts file:// URLs in a note's img tags and reads the referenced local file with no path validation, allowing any authenticated user to disclose arbitrary files readable by the Trilium process. When a text note is saved, Trilium scans its HTML for image sources and downloads each external one; because the HTML sanitizer keeps file as an allowed scheme, a source such as file:///etc/passwd is passed straight to a filesystem read and its contents are stored as a note attachment the user can then retrieve. Pointing the same primitive at an unbounded source such as /dev/zero causes uncontrolled memory allocation that crashes the server process. The feature is enabled by default and is reachable through the web UI, the ETAPI, the web clipper, and note imports, requiring only an authenticated session or an ETAPI token. This issue is fixed in version 0.104.0
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 14:55 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/TriliumNext/Trilium/security/a… | x_refsource_CONFIRM |
| https://github.com/TriliumNext/Trilium/commit/c41… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TriliumNext | Trilium |
Affected:
< 0.104.0
|
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Mitigation
Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place. The login application should be protected against DoS attacks as much as possible. Limiting the database access, perhaps by caching result sets, can help minimize the resources expended. To further limit the potential for a DoS attack, consider tracking the rate of requests received from users and blocking requests that exceed a defined rate threshold.
Mitigation
Architecture and Design
- Mitigation of resource exhaustion attacks requires that the target system either:
- The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.
- The second solution is simply difficult to effectively institute -- and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.
- recognizes the attack and denies that user further access for a given amount of time, or
- uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Mitigation
Architecture and Design
Ensure that protocols have specific limits of scale placed on them.
Mitigation
Implementation
Ensure that all failures in resource allocation place the system into a safe posture.
CAPEC-147: XML Ping of the Death
An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
CAPEC-227: Sustained Client Engagement
An adversary attempts to deny legitimate users access to a resource by continually engaging a specific resource in an attempt to keep the resource tied up as long as possible. The adversary's primary goal is not to crash or flood the target, which would alert defenders; rather it is to repeatedly perform actions or abuse algorithmic flaws such that a given resource is tied up and not available to a legitimate user. By carefully crafting a requests that keep the resource engaged through what is seemingly benign requests, legitimate users are limited or completely denied access to the resource.
CAPEC-492: Regular Expression Exponential Blowup
An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.