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.
406 vulnerabilities reference this CWE, most recent first.
CVE-2026-14683 (GCVE-0-2026-14683)
Vulnerability from cvelistv5 – Published: 2026-07-04 23:00 – Updated: 2026-07-16 07:18 Disputed
VLAI
EPSS
VEX
Title
HdrHistogram AbstractHistogram.java memory allocation
Summary
A vulnerability was detected in HdrHistogram up to 2.2.2. Affected by this issue is the function org.HdrHistogram.AbstractHistogram.decodeFromCompressedByteBuffer of the file src/main/java/org/HdrHistogram/AbstractHistogram.java. The manipulation of the argument lengthOfCompressedContents results in uncontrolled memory allocation. The attack needs to be approached locally. The exploit is now public and may be used. It is still unclear if this vulnerability genuinely exists. This issue is disputed due to the potential lack of crossing of security boundaries and the pre-requisites for a successful attack.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-07 02:37 UTC
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/376279 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/376279/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-14683 | third-party-advisory |
| https://vuldb.com/submit/846750 | third-party-advisory |
| https://vuldb.com/submit/846752 | third-party-advisory |
| https://github.com/HdrHistogram/HdrHistogram/issues/219 | exploitissue-tracking |
| https://github.com/HdrHistogram/HdrHistogram/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | HdrHistogram |
Affected:
2.2.0
Affected: 2.2.1 Affected: 2.2.2 cpe:2.3:a:hdrhistogram:hdrhistogram:*:*:*:*:*:*:*:* |
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CVE-2026-14682 (GCVE-0-2026-14682)
Vulnerability from cvelistv5 – Published: 2026-08-03 02:44 – Updated: 2026-08-04 09:24
VLAI
EPSS
VEX
Title
Possible OOM from unbounded up-front allocation on a definite-length read
Summary
In Bouncy Castle for Java before 1.85, Possible OOM from unbounded up-front allocation on a definite-length read. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series), and before bctls-fips 1.0.24.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 15:31 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/bcgit/bc-java/wiki/CVE%E2%80%9… | vendor-advisory |
| https://github.com/bcgit/bc-java/commit/37094e504… | patch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
0 , < 1.85
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA |
Affected:
2.73.0 , < 2.73.12
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-FJA |
Affected:
1.0.0 , < 1.0.2.7
(maven)
Affected: 2.0.0 , < 2.0.2 (maven) Affected: 2.1.0 , < 2.1.3 (maven) |
|
| Legion of the Bouncy Castle Inc. | BC-FJA |
Affected:
1.0.0 , < 1.0.24
(maven)
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CVE-2026-14454 (GCVE-0-2026-14454)
Vulnerability from cvelistv5 – Published: 2026-07-08 12:30 – Updated: 2026-07-09 14:41
VLAI
EPSS
VEX
Title
Imager versions before 1.033 for Perl treat unsigned EXIF IFD entry counts as signed
Summary
Imager versions before 1.033 for Perl treat unsigned EXIF IFD entry counts as signed.
Imager mishandled large EXIF IFD entry count values, treating them as negative numbers. This could lead to an attempt to allocate a block nearly the size of the address space, which fails and kills the process.
An attacker could craft an image with EXIF data that terminates a worker process.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 13:50 UTC
CWE
Assigner
References
3 references
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CVE-2026-12852 (GCVE-0-2026-12852)
Vulnerability from cvelistv5 – Published: 2026-08-03 02:55 – Updated: 2026-08-03 15:11
VLAI
EPSS
VEX
Title
MLS wire decoder allocates attacker-declared opaque length before bounds check
Summary
In Bouncy Castle for Java before 1.85, MLS wire decoder allocates attacker-declared opaque length before bounds check.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 15:11 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/bcgit/bc-java/wiki/CVE%E2%80%9… | vendor-advisory |
| https://github.com/bcgit/bc-java/commit/a747038bb… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
1.73 , < 1.85
(maven)
|
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CVE-2026-12185 (GCVE-0-2026-12185)
Vulnerability from cvelistv5 – Published: 2026-08-03 00:38 – Updated: 2026-08-04 01:54
VLAI
EPSS
VEX
Title
BKS/UBER keystore allocates from untrusted lengths before integrity check
Summary
In Bouncy Castle for Java before 1.85, BKS/UBER keystore allocates from untrusted lengths before integrity check. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 13:29 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/bcgit/bc-java/wiki/CVE%E2%80%9… | vendor-advisory |
| https://github.com/bcgit/bc-java/commit/7bbd7fe5f… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
0 , < 1.85
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA |
Affected:
2.73.0 , < 2.73.12
(maven)
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CVE-2026-11946 (GCVE-0-2026-11946)
Vulnerability from cvelistv5 – Published: 2026-07-02 10:54 – Updated: 2026-07-02 12:15
VLAI
EPSS
VEX
Title
GetEndpoints Memory Exhaustion in open62541
Summary
An unauthenticated remote attacker can exhaust
server memory via the GetEndpoints Discovery Service in open62541. The
endpointUrl field of GetEndpointsRequest is not validated for length. An
attacker can declare an arbitrarily large string (up to ~4.09 GB via the UInt32
length field) delivered across intermediate chunks without ever sending the
final chunk. The server buffers all chunks in RAM indefinitely until the
SecureChannel times out. The attack is
pre-session and bypasses all encryption configurations.
The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 12:15 UTC
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open62541 project / o6 Automation GmbH | open62541 |
Affected:
1.4.0 , ≤ 1.4.16
(semver)
Affected: 1.5.0 , ≤ 1.5.4 (semver) Affected: master (custom) |
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CVE-2026-10142 (GCVE-0-2026-10142)
Vulnerability from cvelistv5 – Published: 2026-06-10 20:13 – Updated: 2026-07-14 15:53
VLAI
EPSS
VEX
Title
kafka-python prior to 2.3.2 Denial of Service via Protocol Parser Frame Length
Summary
kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in the protocol parser that allows a malicious broker or machine-in-the-middle attacker to exhaust memory or hang connections by sending a crafted 4-byte frame length value without bounds validation. Attackers can send a specially crafted frame length through the receive_bytes() function to trigger either a multi-gigabyte memory allocation or an uncaught ValueError that leaves the connection in a broken state, causing requests to hang and consumers to stop heartbeating until restart.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-11 14:12 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.vulncheck.com/advisories/kafka-python… | technical-descriptionthird-party-advisory |
| https://github.com/dpkp/kafka-python/pull/3019 | issue-tracking |
| https://github.com/dpkp/kafka-python/pull/3026 | issue-tracking |
| https://github.com/dpkp/kafka-python/commit/6e483… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dana Powers | kafka-python |
Affected:
0 , < 2.3.2
(git)
cpe:2.3:a:dpkp:kafka-python:*:*:*:*:*:python:*:* |
Date Public
2026-06-10 00:00
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CVE-2026-9538 (GCVE-0-2026-9538)
Vulnerability from cvelistv5 – Published: 2026-05-26 00:18 – Updated: 2026-05-28 13:16
VLAI
EPSS
VEX
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
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 13:16 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BINGOS | Archive::Tar |
Affected:
0 , < 3.10
(custom)
|
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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
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-20 14:24 UTC
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)
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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
EPSS
VEX
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)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-18 12:43 UTC
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 |
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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.