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.
432 vulnerabilities reference this CWE, most recent first.
CVE-2026-83530 (GCVE-0-2026-83530)
Vulnerability from cvelistv5 – Published: 2026-09-09 14:56 – Updated: 2026-09-09 15:15
VLAI
EPSS
VEX
Title
Uncontrolled Memory Allocation in cel-go
Summary
A user could provide an expression whose string length is longer than the ParserExpressionSizeLimit() configured on the CEL environment, and a memory allocation would occur proportional to the size of the input before the limit would be checked / enforced.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 15:15 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
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CVE-2026-82435 (GCVE-0-2026-82435)
Vulnerability from cvelistv5 – Published: 2026-09-14 14:09 – Updated: 2026-09-14 19:55
VLAI
EPSS
VEX
Title
Apache Storm Worker: Unauthenticated Remote Memory Exhaustion in the Worker Messaging Decoder
Summary
Description
The worker's Netty message decoder is installed ahead of the SASL authentication handlers in the pipeline
and acts on frames before any authentication has taken place. It allocated buffers sized from a
length field carried in the frame, so a single frame from an unauthenticated peer able to reach a worker
slot port could drive a large allocation.
`storm.messaging.netty.authentication` defaults to false, and the decoder runs before the handler that
enforces it in any case, so no credentials are required. The attacker needs only TCP reachability to a
worker port.
The effect of a single frame at the default 768 MB worker heap has not been measured to distinguish
sustained worker loss from transient garbage-collection pressure. The severity assigned to this advisory
reflects the more conservative reading; consumers who require a precise figure should test against their own
worker heap configuration.
Mitigation
Upgrade to 3.1.0, where frames are decoded only after the handshake completes.
Users who cannot upgrade immediately should ensure that worker slot ports are reachable only from within the
cluster, as the security model already recommends, and should enable
`storm.messaging.netty.authentication` where the deployment permits it.
Credit
The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-14 19:55 UTC
CWE
- CWE-789 - Memory allocation with excessive size value
Assigner
References
2 references
| URL | Tags |
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| https://lists.apache.org/thread/wqfy7qb8c76f4c3wr… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Storm Worker |
Affected:
3.0.0 , < 3.1.0
(semver)
|
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CVE-2026-81693 (GCVE-0-2026-81693)
Vulnerability from cvelistv5 – Published: 2026-08-27 14:50 – Updated: 2026-08-27 18:31
VLAI
EPSS
VEX
Title
openssl_encrypt before 1.4.9 Denial of Service via QR total field
Summary
openssl_encrypt before 1.4.9 fails to validate the total field from QR JSON payloads before materializing ranges. Attackers can supply crafted QR images with extremely large total values to trigger unbounded memory allocation and cause denial of service through out-of-memory conditions.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 18:31 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jahlives/openssl_encrypt/secur… | vendor-advisory |
| https://www.vulncheck.com/advisories/openssl-encr… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jahlives | openssl_encrypt |
Affected:
0 , < 1.4.9
(semver)
Unaffected: 1.4.9 (semver) |
Date Public
2026-08-12 00:00
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CVE-2026-81692 (GCVE-0-2026-81692)
Vulnerability from cvelistv5 – Published: 2026-08-27 14:50 – Updated: 2026-08-31 15:57
VLAI
EPSS
VEX
Title
openssl_encrypt before 1.4.9 Denial of Service via STREAMINFO
Summary
openssl_encrypt (pip: openssl-encrypt) versions 1.4.8 and earlier fail to validate the 36-bit STREAMINFO total_samples field of FLAC files before using it to size an allocation (np.random.randint(size=(total_samples, channels))). A ~50-byte crafted FLAC file declaring ~100 million samples causes a multi-gigabyte memory allocation, leading to out-of-memory denial of service during 'decrypt --stego-extract'. The issue is fixed in 1.4.9; both the 1.4.x and 1.5.x lines are affected.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 15:57 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jahlives/openssl_encrypt/secur… | vendor-advisory |
| https://www.vulncheck.com/advisories/openssl-encr… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jahlives | openssl_encrypt |
Affected:
0 , < 1.4.9
(semver)
Unaffected: 1.4.9 (semver) |
Date Public
2026-08-12 00:00
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CVE-2026-77354 (GCVE-0-2026-77354)
Vulnerability from cvelistv5 – Published: 2026-08-21 20:44 – Updated: 2026-08-25 19:15
VLAI
EPSS
VEX
Title
kin-openapi: Uncontrolled resource consumption in openapi3filter deepObject query parameter decoding
Summary
kin-openapi is a Go project for handling OpenAPI files. From 0.124.0 until 0.142.0, openapi3filter.sliceMapToSlice in openapi3filter/req_resp_decoder.go converts attacker-controlled sparse indexes from a deepObject query parameter into a dense slice by allocating entries from zero through the largest supplied index, after which buildResObj creates another slice of the same length. This allocation occurs before schema validation, so maxItems does not prevent it. An unauthenticated client can send a small query such as param[items][50000000]=x to an endpoint whose deepObject schema contains an array, forcing multi-gigabyte heap allocation and causing an OOM kill or restart loop. Other request-body encodings and styled parameters that do not produce bracketed integer indexes are not affected. This issue is fixed in version 0.142.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 19:15 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/getkin/kin-openapi/security/ad… | x_refsource_CONFIRM |
| https://github.com/getkin/kin-openapi/pull/923 | x_refsource_MISC |
| https://github.com/getkin/kin-openapi/commit/1223… | x_refsource_MISC |
| https://github.com/getkin/kin-openapi/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| getkin | kin-openapi |
Affected:
>= 0.124.0, < 0.142.0
|
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CVE-2026-75935 (GCVE-0-2026-75935)
Vulnerability from cvelistv5 – Published: 2026-08-18 19:33 – Updated: 2026-08-19 13:06
VLAI
EPSS
VEX
Title
Memory-amplification denial of service via declared-length preallocation in Amazon ion-java
Summary
Uncontrolled memory allocation in the binary Ion stream cursor in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted Ion binary document containing a declared-length field that causes excessive heap preallocation.
To remediate this issue, users should upgrade to version 1.12.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:06 UTC
CWE
- CWE-789 - Memory allocation with excessive size value
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/amazon-ion/ion-java/releases/t… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/amazon-ion/ion-java/security/a… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Amazon Ion | Amazon Ion Java |
Affected:
1.9.0 , < 1.12.0
(custom)
cpe:2.3:a:amazon_ion:amazon_ion_java:*:*:*:*:*:*:*:* |
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CVE-2026-72687 (GCVE-0-2026-72687)
Vulnerability from cvelistv5 – Published: 2026-08-13 19:11 – Updated: 2026-08-13 20:34
VLAI
EPSS
VEX
Title
Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
Summary
A flaw in Elasticsearch allows a low-privileged authenticated user to submit a single small request containing a forged opaque identifier. Elasticsearch decodes and deserializes the identifier before confirming that it was legitimately issued by the cluster, and a size value carried inside the identifier drives an allocation that is neither capped nor accounted for by the available memory-usage controls. The resulting out-of-memory condition is fatal and terminates the affected node process, resulting in a denial of service.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 20:23 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Elasticsearch |
Affected:
8.0.0 , ≤ 8.19.19
(semver)
Affected: 9.0.0 , ≤ 9.4.4 (semver) Affected: 9.5.0 (semver) |
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CVE-2026-72678 (GCVE-0-2026-72678)
Vulnerability from cvelistv5 – Published: 2026-08-13 19:11 – Updated: 2026-08-13 20:34
VLAI
EPSS
VEX
Title
Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
Summary
Elasticsearch does not validate a size value taken from a user-supplied input before that value is used to reserve memory for an internal data structure. An authenticated user holding only read privileges can submit a single small crafted request to a product API endpoint that causes the node to attempt an excessively large allocation. The resulting memory exhaustion raises a fatal error that terminates the Elasticsearch node process, causing a denial of service for the affected node and degrading cluster health. The defect is not volumetric, so a single request is sufficient regardless of the heap size configured on the target node.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 20:23 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Elasticsearch |
Affected:
8.19.0 , ≤ 8.19.19
(semver)
Affected: 9.4.0 , ≤ 9.4.4 (semver) Affected: 9.5.0 (semver) |
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CVE-2026-72656 (GCVE-0-2026-72656)
Vulnerability from cvelistv5 – Published: 2026-08-13 19:13 – Updated: 2026-08-13 20:29
VLAI
EPSS
VEX
Title
Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
Summary
Memory Allocation with Excessive Size Value (CWE-789) in the ES|QL query processing of Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user able to submit ES|QL queries could send a specially crafted query whose evaluation allocates an unbounded amount of heap memory, exhausting the available heap on the receiving node and causing the node to become unavailable.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 19:57 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Elasticsearch |
Affected:
8.11.0 , ≤ 8.17.9
(semver)
|
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CVE-2026-72645 (GCVE-0-2026-72645)
Vulnerability from cvelistv5 – Published: 2026-08-13 19:13 – Updated: 2026-08-13 20:28
VLAI
EPSS
VEX
Title
Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
Summary
Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user holding only read privileges on a single index can submit one small, specially crafted search request that causes an excessively large memory allocation, exhausting the JVM heap and terminating the affected node.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 19:50 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Elasticsearch |
Affected:
8.0.0 , ≤ 8.19.19
(semver)
Affected: 9.0.0 , ≤ 9.4.4 (semver) Affected: 9.5.0 (semver) |
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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.