Common Weakness Enumeration
CWE-789
AllowedMemory Allocation with Excessive Size Value
Abstraction: Variant · Status: Draft
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
331 vulnerabilities reference this CWE, most recent first.
CVE-2026-42146 (GCVE-0-2026-42146)
Vulnerability from cvelistv5 – Published: 2026-05-04 17:53 – Updated: 2026-05-06 13:44
VLAI
EPSS
VEX
Title
CImg Library: Uncontrolled memory allocation via nb_colors field in _load_bmp
Summary
CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5.
Severity
5.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 13:43 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/GreycLab/CImg/security/advisor… | x_refsource_CONFIRM |
| https://github.com/GreycLab/CImg/issues/477 | x_refsource_MISC |
| https://github.com/GreycLab/CImg/commit/c3aacf5b9… | x_refsource_MISC |
| https://github.com/GreycLab/CImg/releases/tag/v.3.7.5 | x_refsource_MISC |
Impacted products
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CVE-2026-41314 (GCVE-0-2026-41314)
Vulnerability from cvelistv5 – Published: 2026-04-22 21:08 – Updated: 2026-04-23 14:21
VLAI
EPSS
VEX
Title
pypdf: Manipulated FlateDecode image dimensions can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using `/FlateDecode` with large size values. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-23 14:21 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3734 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/ac734dab4e… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.10.2 | x_refsource_MISC |
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CVE-2026-41312 (GCVE-0-2026-41312)
Vulnerability from cvelistv5 – Published: 2026-04-22 21:02 – Updated: 2026-04-23 13:45
VLAI
EPSS
VEX
Title
pypdf: Manipulated FlateDecode predictor parameters can exhaust RAM
Summary
pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing a stream compressed using `/FlateDecode` with a `/Predictor` unequal 1 and large predictor parameters. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-23 13:45 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3734 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/ac734dab4e… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.10.2 | x_refsource_MISC |
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CVE-2026-41178 (GCVE-0-2026-41178)
Vulnerability from cvelistv5 – Published: 2026-06-04 14:38 – Updated: 2026-06-04 15:46
VLAI
EPSS
VEX
Title
OpenTelemetry-Go's baggage parsing no longer caps raw header length
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-04 15:46 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | go.opentelemetry.io/otel/baggage |
Affected:
= 1.41.0
Affected: = 1.43.0 |
|
| open-telemetry | go.opentelemetry.io/otel/propagation |
Affected:
= 1.41.0
Affected: = 1.43.0 |
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CVE-2026-40894 (GCVE-0-2026-40894)
Vulnerability from cvelistv5 – Published: 2026-04-23 18:03 – Updated: 2026-04-23 19:22
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Excessive memory allocation when parsing OpenTelemetry propagation headers
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. In OpenTelemetry.Api 0.5.0-beta.2 to 1.15.2 and OpenTelemetry.Extensions.Propagators 1.3.1 to 1.15.2, The implementation details of the baggage, B3 and Jaeger processing code in the OpenTelemetry.Api and OpenTelemetry.Extensions.Propagators NuGet packages can allocate excessive memory when parsing which could create a potential denial of service (DoS) in the consuming application. This vulnerability is fixed in 1.15.3.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-23 19:22 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
6 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 0.5.0-beta.2, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Api |
Affected:
>= 0.5.0-beta.2, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Extensions.Propagators |
Affected:
>= 1.3.1, < 1.15.3
|
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CVE-2026-40891 (GCVE-0-2026-40891)
Vulnerability from cvelistv5 – Published: 2026-04-23 17:54 – Updated: 2026-04-23 18:23
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: Unbounded `grpc-status-details-bin` parsing in OTLP/gRPC retry handling
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry over gRPC using the OpenTelemetry Protocol (OTLP), the exporter may parse a server-provided grpc-status-details-bin trailer during retry handling. Prior to the fix, a malformed trailer could encode an extremely large length-delimited protobuf field which was used directly for allocation, allowing excessive memory allocation and potential denial of service (DoS). This vulnerability is fixed in 1.15.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-23 18:22 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 1.13.1, < 1.15.3
|
|
| open-telemetry | OpenTelemetry.Exporter.OpenTelemetryProtocol |
Affected:
>= 1.13.1, < 1.15.3
|
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CVE-2026-40378 (GCVE-0-2026-40378)
Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-11-01 17:33
VLAI
EPSS
VEX
Title
Windows Local Security Authority Subsystem Service (LSASS) Denial of Service Vulnerability
Summary
Memory allocation with excessive size value in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 17:36 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
20 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows 10 Version 21H2 |
Affected:
10.0.19044.0 , < 10.0.19044.7548
(custom)
|
|
| Microsoft | Windows 10 Version 22H2 |
Affected:
10.0.19045.0 , < 10.0.19045.7548
(custom)
|
|
| Microsoft | Windows 11 version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7376
(custom)
|
|
| Microsoft | Windows 11 Version 23H2 |
Affected:
10.0.22631.0 , < 10.0.22631.7376
(custom)
|
|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.8875
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.8875
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.2525
(custom)
|
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < 6.2.9200.26226
(custom)
|
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < 6.2.9200.26226
(custom)
|
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23291
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23291
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9339
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.9020
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5386
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33158
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33158
(custom)
|
Date Public
2026-07-14 14:00
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],
"product": "Windows Server 2012 R2",
"vendor": "Microsoft",
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"vendor": "Microsoft",
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"vendor": "Microsoft",
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"versionType": "custom"
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"vendor": "Microsoft",
"versions": [
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CVE-2026-40303 (GCVE-0-2026-40303)
Vulnerability from cvelistv5 – Published: 2026-04-17 21:01 – Updated: 2026-04-20 16:19
VLAI
EPSS
VEX
Title
zrok allows unauthenticated DoS via unbounded memory allocation in striped session cookie parsing
Summary
zrok is software for sharing web services, files, and network resources. Prior to version 2.0.1, endpoints.GetSessionCookie parses an attacker-supplied cookie chunk count and calls make([]string, count) with no upper bound before any token validation occurs. The function is reached on every request to an OAuth-protected proxy share, allowing an unauthenticated remote attacker to trigger gigabyte-scale heap allocations per request, leading to process-level OOM termination or repeated goroutine panics. Both publicProxy and dynamicProxy are affected. Version 2.0.1 patches the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-20 16:18 UTC
CWE
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/openziti/zrok/security/advisor… | x_refsource_CONFIRM |
| https://github.com/openziti/zrok/releases/tag/v2.0.1 | x_refsource_MISC |
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CVE-2026-40182 (GCVE-0-2026-40182)
Vulnerability from cvelistv5 – Published: 2026-04-23 17:51 – Updated: 2026-04-23 18:38
VLAI
EPSS
VEX
Title
OpenTelemetry dotnet: OTLP exporter reads unbounded HTTP response bodies
Summary
OpenTelemetry dotnet is a dotnet telemetry framework. From 1.13.1 to before 1.15.2, When exporting telemetry to a back-end/collector over gRPC or HTTP using OpenTelemetry Protocol format (OTLP), if the request results in a unsuccessful request (i.e. HTTP 4xx or 5xx), the response is read into memory with no upper-bound on the number of bytes consumed. This could cause memory exhaustion in the consuming application if the configured back-end/collector endpoint is attacker-controlled (or a network attacker can MitM the connection) and an extremely large body is returned by the response. This vulnerability is fixed in 1.15.2.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-23 18:38 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-d… | x_refsource_MISC |
| https://github.com/open-telemetry/opentelemetry-p… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-dotnet |
Affected:
>= 1.13.1, < 1.15.2
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CVE-2026-40006 (GCVE-0-2026-40006)
Vulnerability from cvelistv5 – Published: 2026-07-10 07:10 – Updated: 2026-07-10 14:59
VLAI
EPSS
VEX
Title
Apache IoTDB: Unauthenticated heap-exhaustion DoS via unbounded allocation in IoTDB AirGap pipe receiver
Summary
Memory Allocation with Excessive Size Value, Allocation of Resources Without Limits or Throttling, Missing Authentication for Critical Function vulnerability in Apache IoTDB.
When pipe_air_gap_receiver_enabled=true, the IoTDB AirGap pipe receiver
accepts raw TCP connections on port 9780 with no authentication. The
readLength method reads an attacker-controlled 32-bit integer from the
socket and readData passes it directly to new byte[length] with no
upper-bound check. An unauthenticated attacker can cause the JVM to attempt
an allocation of up to 2,147,483,647 bytes per connection, exhausting heap
memory and crashing or severely degrading the DataNode process.
This issue affects Apache IoTDB: from 1.0.0 before 2.0.10.
Users are recommended to upgrade to version 2.0.10, which fixes the issue.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 14:59 UTC
CWE
Assigner
apache
CNA
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache IoTDB |
Affected:
1.0.0 , < 2.0.10
(semver)
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"value": "\u003cp\u003eMemory Allocation with Excessive Size Value, Allocation of Resources Without Limits or Throttling, Missing Authentication for Critical Function vulnerability in Apache IoTDB.\u003cbr\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eWhen pipe_air_gap_receiver_enabled=true, the IoTDB AirGap pipe receiver\naccepts raw TCP connections on port 9780 with no authentication. The\nreadLength method reads an attacker-controlled 32-bit integer from the\nsocket and readData passes it directly to new byte[length] with no\nupper-bound check. An unauthenticated attacker can cause the JVM to attempt\nan allocation of up to 2,147,483,647 bytes per connection, exhausting heap\nmemory and crashing or severely degrading the DataNode process.\u003c/span\u003e\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThis issue affects Apache IoTDB: from 1.0.0 before 2.0.10.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 2.0.10, which fixes the issue.\u003c/p\u003e"
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"value": "Memory Allocation with Excessive Size Value, Allocation of Resources Without Limits or Throttling, Missing Authentication for Critical Function vulnerability in Apache IoTDB.\nWhen pipe_air_gap_receiver_enabled=true, the IoTDB AirGap pipe receiver\naccepts raw TCP connections on port 9780 with no authentication. The\nreadLength method reads an attacker-controlled 32-bit integer from the\nsocket and readData passes it directly to new byte[length] with no\nupper-bound check. An unauthenticated attacker can cause the JVM to attempt\nan allocation of up to 2,147,483,647 bytes per connection, exhausting heap\nmemory and crashing or severely degrading the DataNode process.\n\n\nThis issue affects Apache IoTDB: from 1.0.0 before 2.0.10.\n\nUsers are recommended to upgrade to version 2.0.10, which fixes the issue."
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"cweId": "CWE-770",
"description": "CWE-770 Allocation of Resources Without Limits or Throttling",
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"cweId": "CWE-306",
"description": "CWE-306 Missing Authentication for Critical Function",
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"url": "https://lists.apache.org/thread/rfpt7m9fvdrw37r3ow5omp2n914z6zqk"
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"title": "Apache IoTDB: Unauthenticated heap-exhaustion DoS via unbounded allocation in IoTDB AirGap pipe receiver",
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Mitigation
Implementation
Architecture and Design
Perform adequate input validation against any value that influences the amount of memory that is allocated. Define an appropriate strategy for handling requests that exceed the limit, and consider supporting a configuration option so that the administrator can extend the amount of memory to be used if necessary.
Mitigation
Operation
Run your program using system-provided resource limits for memory. This might still cause the program to crash or exit, but the impact to the rest of the system will be minimized.
No CAPEC attack patterns related to this CWE.