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.
2353 vulnerabilities reference this CWE, most recent first.
CVE-2026-56745 (GCVE-0-2026-56745)
Vulnerability from cvelistv5 – Published: 2026-07-21 21:31 – Updated: 2026-07-22 15:30
VLAI
EPSS
VEX
Title
Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion
Summary
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, the `SpdyHttpDecoder` handler in Netty's SPDY-to-HTTP codec allocates a pooled `ByteBuf` when processing a client-initiated `SYN_STREAM` frame with `FLAG_FIN=0` and stores the partially constructed `FullHttpRequest` in `messageMap`; when the remote peer sends `RST_STREAM` for that stream or the accumulated content exceeds `maxContentLength`, the decoder removes the entry but does not release the pooled `ByteBuf`, causing native memory exhaustion. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 15:30 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/commit/5b68c61f37a… | x_refsource_MISC |
| https://github.com/netty/netty/commit/bb2ff68a1fb… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
Impacted products
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CVE-2026-56741 (GCVE-0-2026-56741)
Vulnerability from cvelistv5 – Published: 2026-07-17 21:15 – Updated: 2026-07-20 15:21
VLAI
EPSS
VEX
Title
JLine: Unauthenticated Remote DoS via Unbounded Telnet NAWS Terminal Geometry
Summary
JLine is a Java library for handling console input. Prior to 3.30.14, 4.0.16, and 4.2.1, the JLine3 Telnet server remote-telnet module does not apply an upper bound to terminal dimensions received via the Telnet NAWS option, and TelnetIO.handleNAWS() in TelnetIO.java:856-879 reads client-supplied width and height as 16-bit unsigned integers and passes values such as 65535x65535 to setTerminalGeometry(), allowing an unauthenticated remote attacker to repeatedly alternate values and trigger continuous expensive rendering work that causes CPU exhaustion and denial of service. This issue is fixed in versions 3.30.14, 4.0.16, and 4.2.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 15:21 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M
CNA
References
7 references
| URL | Tags |
|---|---|
| https://github.com/jline/jline3/security/advisori… | x_refsource_CONFIRM |
| https://github.com/jline/jline3/pull/2000 | x_refsource_MISC |
| https://github.com/jline/jline3/commit/3ea9cad869… | x_refsource_MISC |
| https://github.com/jline/jline3/commit/733eb353dc… | x_refsource_MISC |
| https://github.com/jline/jline3/commit/86b7ba7801… | x_refsource_MISC |
| https://github.com/jline/jline3/releases/tag/4.0.16 | x_refsource_MISC |
| https://github.com/jline/jline3/releases/tag/4.2.1 | x_refsource_MISC |
Impacted products
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CVE-2026-56740 (GCVE-0-2026-56740)
Vulnerability from cvelistv5 – Published: 2026-07-17 21:17 – Updated: 2026-07-20 13:58
VLAI
EPSS
VEX
Title
JLine: Unauthenticated Remote Memory Exhaustion via Unbounded Telnet NEW-ENVIRON Variables
Summary
JLine is a Java library for handling console input. Prior to 3.30.14, 4.0.16, and 4.2.1, the JLine3 Telnet server remote-telnet module does not limit the number of environment variables a client may inject via the Telnet NEW-ENVIRON option, and TelnetIO.readNEVariables() in TelnetIO.java:1127-1180 stores each variable pair in a HashMap held by ConnectionData, allowing an unauthenticated attacker to flood unique variable pairs before the terminating IAC SE byte and exhaust JVM heap memory with an OutOfMemoryError. This issue is fixed in versions 3.30.14, 4.0.16, and 4.2.1.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 13:57 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M
CNA
References
9 references
| URL | Tags |
|---|---|
| https://github.com/jline/jline3/security/advisori… | x_refsource_CONFIRM |
| https://github.com/jline/jline3/pull/2000 | x_refsource_MISC |
| https://github.com/jline/jline3/pull/2001 | x_refsource_MISC |
| https://github.com/jline/jline3/commit/0389f0ee6d… | x_refsource_MISC |
| https://github.com/jline/jline3/commit/4ee3a73849… | x_refsource_MISC |
| https://github.com/jline/jline3/commit/934f09e612… | x_refsource_MISC |
| https://github.com/jline/jline3/releases/tag/4.0.16 | x_refsource_MISC |
| https://github.com/jline/jline3/releases/tag/4.2.1 | x_refsource_MISC |
| https://github.com/jline/jline3/releases/tag/jlin… | x_refsource_MISC |
Impacted products
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},
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"tags": [
"x_refsource_MISC"
],
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CVE-2026-56725 (GCVE-0-2026-56725)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:09 – Updated: 2026-09-29 19:37
VLAI
EPSS
VEX
Title
Zammad: Denial of Service via OTRS Import Controller
Summary
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.2, summary An unauthenticated request to POST /api/v1/import/otrs/import_check blocks a Zammad request worker for roughly two minutes. The import_check and import_status actions are missing the setup_done_response guard that other actions in the same controller carry, so they execute on fully set-up production instances. The action enters a retry loop against a blank OTRS endpoint, sleeping for 30 s + 45 s between attempts. Impact An unauthenticated remote attacker denies service to a production Zammad instance. Each request costs almost nothing and forces ~115 seconds of server-side blocking. A few requests per second saturate the Puma worker pool. The condition persists as long as the traffic continues. No account, valid import configuration, or target knowledge beyond the hostname is needed. CSRF token is trivially obtained from any prior GET response. This issue is fixed in version 7.0.2.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 19:37 UTC
CWE
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zammad/zammad/security/advisor… | x_refsource_CONFIRM |
| https://github.com/zammad/zammad/commit/a04a95b69… | x_refsource_MISC |
| https://github.com/zammad/zammad/releases/tag/7.0.2 | x_refsource_MISC |
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CVE-2026-56248 (GCVE-0-2026-56248)
Vulnerability from cvelistv5 – Published: 2026-06-23 12:12 – Updated: 2026-06-23 13:25
VLAI
EPSS
VEX
Title
Capgo - Unauthenticated Denial-of-Service via audit_logs RLS Policy
Summary
Cap-go capgo (capgo-backend) before 12.128.12 contains an unauthenticated denial-of-service vulnerability arising from the audit_logs table's Row-Level Security (RLS) policy when accessed via the Supabase PostgREST API. Because the PostgreSQL query planner executes costly logic before RLS rejection, unfiltered queries to the public.audit_logs endpoint using the public anon key consistently trigger statement timeouts (PostgREST error 57014). Under concurrency, this exhausts database resources and causes cascading HTTP 500 failures on unrelated endpoints (e.g. /orgs), resulting in an application-layer denial of service.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 13:24 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Cap-go/capgo/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/capgo-unauth… | third-party-advisory |
Impacted products
Date Public
2026-05-08 00:00
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CVE-2026-56145 (GCVE-0-2026-56145)
Vulnerability from cvelistv5 – Published: 2026-07-21 20:04 – Updated: 2026-07-22 18:25
VLAI
EPSS
VEX
Title
Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
Summary
Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user with permission to execute EQL sequence queries against an index they control can send a specially crafted query that triggers excessive memory consumption, causing the Elasticsearch node to crash.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 18:13 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
elastic
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Elasticsearch |
Affected:
9.4.0 , ≤ 9.4.3
(semver)
Affected: 8.0.0 , ≤ 8.19.17 (semver) Affected: 9.0.0 , ≤ 9.3.6 (semver) |
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CVE-2026-56018 (GCVE-0-2026-56018)
Vulnerability from cvelistv5 – Published: 2026-06-29 19:38 – Updated: 2026-06-29 22:24
VLAI
EPSS
VEX
Title
JavaScript::Minifier::XS versions before 0.16 for Perl leak memory on every call to minify(), allowing unbounded memory growth
Summary
JavaScript::Minifier::XS versions before 0.16 for Perl leak memory on every call to minify(), allowing unbounded memory growth.
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A long-lived process that minifies repeatedly, such as an asset pipeline or a server-side minifier endpoint, grows in memory without bound until it exhausts available memory and is killed, causing denial of service.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-29 20:52 UTC
CWE
Assigner
CPANSec
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/bleargh45/JavaScript-Minifier-… | issue-tracking |
| https://metacpan.org/release/GTERMARS/JavaScript-… | release-notes |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GTERMARS | JavaScript::Minifier::XS |
Affected:
0 , < 0.16
(custom)
|
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CVE-2026-55851 (GCVE-0-2026-55851)
Vulnerability from cvelistv5 – Published: 2026-07-21 21:22 – Updated: 2026-07-23 14:04
VLAI
EPSS
VEX
Title
Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion
Summary
Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final up to (but not including) 4.2.16.Final, and 4.1.0.Final up to (but not including) 4.1.135, the `HAProxyMessageDecoder` in Netty's `codec-haproxy` module performs protocol version detection by reading the 13th byte as a signed Java `byte` and widening it to `int` without masking; a PROXY protocol v2 binary prefix followed by version byte `0xFF` sign-extends to `-1`, collides with the decoder's need-more-data sentinel, and causes `ByteToMessageDecoder` to accumulate inbound bytes in an unbounded `cumulation` buffer until direct memory is exhausted. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 14:04 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/commit/5b68c61f37a… | x_refsource_MISC |
| https://github.com/netty/netty/commit/bb2ff68a1fb… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
Impacted products
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CVE-2026-55833 (GCVE-0-2026-55833)
Vulnerability from cvelistv5 – Published: 2026-07-20 23:18 – Updated: 2026-07-21 13:03
VLAI
EPSS
VEX
Title
Netty SPDY zlib header block continues decoded expansion after maxHeaderSize truncation
Summary
Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty SPDY header decoding continues inflating zlib-compressed header blocks after the raw header parser has exceeded `maxHeaderSize` and marked the frame truncated in `SpdyFrameCodec`, allowing a remote peer to send a small compressed `HEADERS` block that expands into much larger raw header data and causes compression-amplified CPU and allocation churn. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 13:03 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/commit/5b68c61f37a… | x_refsource_MISC |
| https://github.com/netty/netty/commit/bb2ff68a1fb… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
Impacted products
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CVE-2026-55831 (GCVE-0-2026-55831)
Vulnerability from cvelistv5 – Published: 2026-07-20 23:00 – Updated: 2026-07-23 14:33
VLAI
EPSS
VEX
Title
Netty SPDY SETTINGS frame count materializes unbounded settings map
Summary
Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty's SPDY SETTINGS decoder accepts a peer-declared SETTINGS entry count up to the 24-bit frame-length limit and materializes every unique setting ID in `DefaultSpdySettingsFrame`, allowing a remote SPDY/3.1 peer to send a syntactically valid roughly 2 MiB SETTINGS frame that creates 262144 map entries and amplifies network input into heap growth and ordered-map insertion work. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 14:33 UTC
CWE
Assigner
GitHub_M
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/netty/netty/commit/5b68c61f37a… | x_refsource_MISC |
| https://github.com/netty/netty/commit/bb2ff68a1fb… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
| https://github.com/netty/netty/releases/tag/netty… | x_refsource_MISC |
Impacted products
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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.