CWE-789
Memory Allocation with Excessive Size Value
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.
CVE-2026-42440 (GCVE-0-2026-42440)
Vulnerability from cvelistv5 – Published: 2026-05-04 16:40 – Updated: 2026-05-05 16:03
VLAI
Title
Apache OpenNLP: OOM DoS via Unbounded Array Allocation in AbstractModelReader
Summary
OOM Denial of Service via Unbounded Array Allocation in Apache OpenNLP AbstractModelReader
Versions Affected:
before 2.5.9
before 3.0.0-M3
Description:
The AbstractModelReader methods getOutcomes(), getOutcomePatterns(), and getPredicates() each read a 32-bit signed integer count field from a binary model stream and pass that value directly to an array allocation (new String[numOutcomes], new int[numOCTypes][], new String[NUM_PREDS]) without validating that the value is non-negative or within a reasonable bound. The count is therefore fully attacker-controlled when the model file originates from an untrusted source.
A crafted .bin model file in which any of these count fields is set to Integer.MAX_VALUE (or any value large enough to exhaust the available heap) triggers an OutOfMemoryError at the array allocation itself, before the corresponding label or pattern data is consumed from the stream. The error occurs very early in deserialization: for a GIS model, getOutcomes() is reached after only the model-type string, the correction constant, and the correction parameter have been read; so the attacker pays no meaningful size cost to weaponize a payload, and a single small file can crash a JVM that loads it. Any code path that deserializes a .bin model is affected, including direct use of GenericModelReader and any higher-level component that delegates to it during model load.
The practical impact is denial of service against processes that load model files from untrusted or semi-trusted origins.
Mitigation:
* 2.x users should upgrade to 2.5.9.
* 3.x users should upgrade to 3.0.0-M3.
Note: The fix introduces an upper bound on each of the three count fields, checked before array allocation; counts that are negative or exceed the bound cause an IllegalArgumentException to be thrown and the read to fail fast with no large allocation. The default bound is 10,000,000, which is well above the entry counts of legitimate OpenNLP models but far below any value that would threaten heap exhaustion. Deployments that legitimately need to load models with more entries than the default can raise the limit at JVM startup by setting the OPENNLP_MAX_ENTRIES system property to the desired positive integer (e.g. -DOPENNLP_MAX_ENTRIES=50000000); invalid or non-positive values fall back to the default.
Users who cannot upgrade immediately should treat all .bin model files as untrusted input unless their provenance is verified, and should avoid loading models supplied by end users or fetched from third-party repositories without integrity checks.
Severity
No CVSS data available.
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/s8xlkx1gqbxfsq48p… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache OpenNLP |
Affected:
0 , < 2.5.9
(semver)
Affected: 3.0 , < 3.0.0-M3 (semver) |
Credits
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CVE-2026-42582 (GCVE-0-2026-42582)
Vulnerability from cvelistv5 – Published: 2026-05-13 18:06 – Updated: 2026-05-13 19:35
VLAI
Title
Netty: HTTP/3 QPACK literal unbounded allocation
Summary
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final, when decoding header blocks, the non-Huffman branch of io.netty.handler.codec.http3.QpackDecoder#decodeHuffmanEncodedLiteral may execute new byte[length] for a string literal before verifying that length bytes are actually present in the compressed field section. The wire encoding allows a very large length to be expressed in few bytes. There is no check that length <= in.readableBytes() before new byte[length]. This vulnerability is fixed in 4.2.13.Final.
Severity
7.5 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/netty/netty/security/advisorie… | x_refsource_CONFIRM |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| netty | netty |
Affected:
>= 4.2.0.Alpha1, < 4.2.13.Final
|
|
| io.netty | netty-codec-http3 |
Affected:
>= 4.2.0.Alpha1, < 4.2.13.Final
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CVE-2026-42946 (GCVE-0-2026-42946)
Vulnerability from cvelistv5 – Published: 2026-05-13 14:12 – Updated: 2026-05-13 16:06
VLAI
Title
NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability
Summary
A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://my.f5.com/manage/s/article/K000161027 | vendor-advisorypatch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| F5 | NGINX Plus |
Unaffected:
R37 , < *
(custom)
Affected: R36 , < R36 P4 (custom) Affected: R32 , < R32 P6 (custom) |
|
| F5 | NGINX Open Source |
Unaffected:
1.31.0 , < *
(semver)
Affected: 0.8.42 , < 1.30.1 (semver) |
Date Public
2026-05-13 14:00
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CVE-2026-43868 (GCVE-0-2026-43868)
Vulnerability from cvelistv5 – Published: 2026-05-05 07:49 – Updated: 2026-05-05 19:21
VLAI
Title
Apache Thrift: Rust implementation vulnerable to CVE-2020-13949 pattern
Summary
Memory Allocation with Excessive Size Value vulnerability in Apache Thrift.
This issue affects Apache Thrift: before 0.23.0.
Users are recommended to upgrade to version 0.23.0, which fixes the issue.
Severity
No CVSS data available.
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/zj76dtwnbbs1m7z3f… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Thrift |
Affected:
0 , < 0.23.0
(semver)
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CVE-2026-44375 (GCVE-0-2026-44375)
Vulnerability from cvelistv5 – Published: 2026-05-14 14:32 – Updated: 2026-05-14 16:02
VLAI
Title
Nerdbank.MessagePack: Attacker-controlled stackalloc in DateTime decoding causes process-terminating StackOverflowException
Summary
Nerdbank.MessagePack is a NativeAOT-compatible MessagePack serialization library. Prior to 1.1.62, Nerdbank.MessagePack contains an uncontrolled stack allocation vulnerability in DateTime decoding. A malicious MessagePack payload can declare an oversized timestamp extension length, causing the reader to allocate an attacker-controlled number of bytes on the stack. This can trigger a StackOverflowException, which is not catchable by user code and terminates the process. This vulnerability is fixed in 1.1.62.
Severity
7.5 (High)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/AArnott/Nerdbank.MessagePack/s… | x_refsource_CONFIRM |
| https://github.com/AArnott/Nerdbank.MessagePack/p… | x_refsource_MISC |
| https://github.com/AArnott/Nerdbank.MessagePack/c… | x_refsource_MISC |
| https://github.com/AArnott/Nerdbank.MessagePack/r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AArnott | Nerdbank.MessagePack |
Affected:
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CVE-2026-47313 (GCVE-0-2026-47313)
Vulnerability from cvelistv5 – Published: 2026-05-19 06:28 – Updated: 2026-05-19 13:18
VLAI
Summary
Memory allocation with excessive size value vulnerability in Samsung Open Source Escargot allows Excessive Allocation.
This issue affects Escargot: 590345cc6258317c5da850d846ce6baaf2afc2d3.
Severity
5.5 (Medium)
CWE
- CWE-789 - Memory allocation with excessive size value
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Samsung Open Source | Escargot |
Affected:
590345cc6258317c5da850d846ce6baaf2afc2d3
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CVE-2026-5740 (GCVE-0-2026-5740)
Vulnerability from cvelistv5 – Published: 2026-05-22 10:22 – Updated: 2026-05-22 12:14
VLAI
Title
Unauthenticated WebSocket binary frame causes denial of service in Mattermost Server
Summary
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users via a crafted binary WebSocket message sent to the public WebSocket endpoint.. Mattermost Advisory ID: MMSA-2026-00647
Severity
7.5 (High)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://mattermost.com/security-updates | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.6.0 , ≤ 11.6.0
(semver)
Affected: 11.5.0 , ≤ 11.5.3 (semver) Affected: 11.4.0 , ≤ 11.4.4 (semver) Affected: 10.11.0 , ≤ 10.11.14 (semver) Unaffected: 11.7.0 Unaffected: 11.6.1 Unaffected: 11.5.4 Unaffected: 11.4.5 Unaffected: 10.11.15 |
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CVE-2026-6340 (GCVE-0-2026-6340)
Vulnerability from cvelistv5 – Published: 2026-05-18 07:08 – Updated: 2026-05-18 12:43
VLAI
Title
Memory Exhaustion via Malicious 7zip File Upload
Summary
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted 7zip file with excessive folder declarations.. Mattermost Advisory ID: MMSA-2026-00573
Severity
4.3 (Medium)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://mattermost.com/security-updates | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.5.0 , ≤ 11.5.1
(semver)
Affected: 10.11.0 , ≤ 10.11.13 (semver) Affected: 11.4.0 , ≤ 11.4.3 (semver) Unaffected: 11.6.0 Unaffected: 11.5.2 Unaffected: 10.11.14 Unaffected: 11.4.4 |
Credits
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CVE-2026-8485 (GCVE-0-2026-8485)
Vulnerability from cvelistv5 – Published: 2026-05-20 14:06 – Updated: 2026-05-20 14:24
VLAI
Title
Uncontrolled Memory Allocation vulnerability in Progress Software MOVEit Automation
Summary
Uncontrolled Memory Allocation vulnerability in Progress Software MOVEit Automation allows Excessive Allocation.
This issue affects MOVEit Automation: before 2025.0.11, from 2025.1.0 before 2025.1.7.
Severity
5.9 (Medium)
CWE
- CWE-789 - Uncontrolled Memory Allocation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://docs.progress.com/bundle/moveit-automatio… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Progress Software | MOVEit Automation |
Affected:
0 , < 2025.0.11
(semver)
Affected: 2025.1.0 , < 2025.1.7 (semver) |
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CVE-2026-9538 (GCVE-0-2026-9538)
Vulnerability from cvelistv5 – Published: 2026-05-26 00:18 – Updated: 2026-05-26 00:18
VLAI
Title
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header
Summary
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header.
_read_tar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value.
A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.
Severity
No CVSS data available.
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jib/archive-tar-new/commit/f9a… | patch |
| https://metacpan.org/release/BINGOS/Archive-Tar-3… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BINGOS | Archive::Tar |
Affected:
0 , < 3.10
(custom)
|
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Mitigation
Phases: Implementation, Architecture and Design
Description:
- 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
Phase: Operation
Description:
- 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.