Common Weakness Enumeration
CWE-409
AllowedImproper Handling of Highly Compressed Data (Data Amplification)
Abstraction: Base · Status: Incomplete
The product does not handle or incorrectly handles a compressed input with a very high compression ratio that produces a large output.
230 vulnerabilities reference this CWE, most recent first.
CVE-2026-78594 (GCVE-0-2026-78594)
Vulnerability from cvelistv5 – Published: 2026-09-02 14:43 – Updated: 2026-09-02 15:58
VLAI
EPSS
VEX
Title
Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of Service
Summary
Improper Handling of Highly Compressed Data (CWE-409) in APM Server can lead to a persistent denial of service via Excessive Allocation (CAPEC-130). An authenticated user with write access to source map content could store specially crafted, highly compressed content that exhausts the memory available to APM Server when it is later processed, terminating the process. The condition recurs on every restart until the stored content is removed.
Severity
4.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 15:44 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Apm Server |
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-2026-78206 (GCVE-0-2026-78206)
Vulnerability from cvelistv5 – Published: 2026-08-24 00:30 – Updated: 2026-08-29 11:47
VLAI
EPSS
VEX
Title
exceljs through 4.4.0 Uncontrolled Resource Consumption via Unbounded xlsx Decompression
Summary
exceljs through 4.4.0 decompresses all entries from supplied xlsx archives into memory without limits on entry size, total size, or compression ratio. Attackers can upload highly compressed workbooks that expand to gigabytes in memory, exhausting available resources and causing denial of service.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 18:09 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/exceljs/exceljs | product |
| https://github.com/mateocallec/exceljs-hardened/s… | third-party-advisory |
| https://github.com/exceljs/exceljs/blob/v4.4.0/li… | technical-description |
| https://www.vulncheck.com/advisories/exceljs-thro… | third-party-advisory |
Impacted products
Date Public
2026-08-23 00:00
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CVE-2026-75936 (GCVE-0-2026-75936)
Vulnerability from cvelistv5 – Published: 2026-08-18 19:34 – Updated: 2026-08-19 13:07
VLAI
EPSS
VEX
Title
Memory-amplification denial of service via GZIP decompression bomb in Amazon ion-java
Summary
Improper handling of highly compressed data in the GZIP auto-decompression handler in Amazon ion-java before 1.12.0 might allow remote actors to cause a denial of service via a crafted compressed Ion document that expands to an arbitrarily large size upon decompression.
To remediate this issue, users should upgrade to version 1.12.0 and configure withGzipDecompressionEnabled(false) and/or set an explicit withMaximumBufferSize() when parsing untrusted input.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:07 UTC
CWE
- CWE-409 - (Improper Handling of Highly Compressed Data)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/amazon-ion/ion-java/releases/t… | patch |
| https://github.com/amazon-ion/ion-java/security/a… | third-party-advisory |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Amazon Ion | Amazon Ion Java |
Affected:
0 , < 1.12.0
(custom)
cpe:2.3:a:amazon_ion:amazon_ion_java:*:*:*:*:*:*:*:* |
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CVE-2026-75476 (GCVE-0-2026-75476)
Vulnerability from cvelistv5 – Published: 2026-08-19 21:05 – Updated: 2026-08-20 15:26
VLAI
EPSS
VEX
Title
Tanium addressed a compression bomb vulnerability in Threat Response.
Summary
Tanium addressed a compression bomb vulnerability in Threat Response.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:15 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Tanium | Threat Response |
Affected:
4.9 , < 4.9.437
(custom)
Affected: 4.12 , < 4.12.308 (custom) Affected: 4.17 , < 4.17.277 (custom) |
Date Public
2026-08-19 21:04
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CVE-2026-74046 (GCVE-0-2026-74046)
Vulnerability from cvelistv5 – Published: 2026-08-18 17:27 – Updated: 2026-08-18 19:27
VLAI
EPSS
VEX
Title
Wazuh 4.4.0 < 4.14.7 DoS via fdecompress_files() Zip Bomb
Summary
Wazuh 4.4.0 before 4.14.7 contains a denial of service vulnerability in the fdecompress_files() function within cluster.py that allows authenticated cluster peers to exhaust memory by supplying a malicious synchronization archive without decompressed size limits. Attackers holding a valid cluster Fernet key can upload a small, highly compressed zip bomb archive that forces wazuh-clusterd on the master node to decompress the full payload into memory, causing memory exhaustion and service disruption.
Severity
4.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:26 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wazuh/wazuh/security/advisorie… | vendor-advisory |
| https://github.com/wazuh/wazuh/pull/37119 | patch |
| https://www.vulncheck.com/advisories/wazuh-dos-vi… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wazuh | wazuh-manager |
Affected:
4.4.0 , < 4.14.7
(semver)
|
Date Public
2026-08-18 00:00
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CVE-2026-73232 (GCVE-0-2026-73232)
Vulnerability from cvelistv5 – Published: 2026-08-11 19:32 – Updated: 2026-08-12 12:59
VLAI
EPSS
VEX
Title
ffuf denial of service (OOM) via HTTP response decompression bomb
Summary
ffuf is a fast web fuzzer written in Go. Prior to 2.2.0, ffuf allows a malicious target server to cause an out-of-memory denial of service because the response size guard in pkg/runner/simple.go checks only the compressed Content-Length while io.ReadAll reads gzip, brotli, deflate, transparently decompressed, or chunked response bodies without a decompressed-size bound. This issue is fixed in version 2.2.0.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 12:58 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ffuf/ffuf/security/advisories/… | x_refsource_CONFIRM |
| https://github.com/ffuf/ffuf/pull/897 | x_refsource_MISC |
| https://github.com/ffuf/ffuf/commit/fb0da86c60443… | x_refsource_MISC |
| https://github.com/ffuf/ffuf/releases/tag/v2.2.0 | x_refsource_MISC |
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CVE-2026-72628 (GCVE-0-2026-72628)
Vulnerability from cvelistv5 – Published: 2026-09-01 19:20 – Updated: 2026-09-01 19:37
VLAI
EPSS
VEX
Title
Improper Handling of Highly Compressed Data in Kibana Leading to Denial of Service
Summary
Improper Handling of Highly Compressed Data (CWE-409) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user holding Streams management privileges could supply specially crafted content that expands to a far larger volume of data during processing, exhausting the memory available to Kibana. The Kibana process is terminated by the host and remains unavailable to all users until the service is restarted.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 19:37 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
1 reference
Impacted products
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CVE-2026-70469 (GCVE-0-2026-70469)
Vulnerability from cvelistv5 – Published: 2026-09-16 19:38 – Updated: 2026-09-16 20:12
VLAI
EPSS
VEX
Title
Apache NiFi: Improper Handling of Case Sensitivity for Content-Encoding in HTTP Requests
Summary
Apache NiFi 2.11.0 disabled support for gzip-encoded HTTP requests for the application REST API and rejected requests that included the standard Content-Encoding header indicating gzip encoding. The framework enforcement filter did not check multiple instances of the Content-Encoding header and did not reject non-standard identifiers for gzip encoding, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.12.0 is the recommended mitigation, which disables decompression of gzip-encoded HTTP requests regardless of header number or encoding identifiers.
Severity
No CVSS data available.
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache NiFi |
Affected:
2.11.0
(semver)
|
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CVE-2026-69304 (GCVE-0-2026-69304)
Vulnerability from cvelistv5 – Published: 2026-09-08 17:17 – Updated: 2026-09-16 21:57
VLAI
EPSS
VEX
Title
ASP.NET Core Denial of Service Vulnerability
Summary
Improper handling of highly compressed data (data amplification) in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 19:33 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | .NET 10.0 |
Affected:
10.0.0 , < 10.0.12
(custom)
|
|
| Microsoft | .NET 8.0 |
Affected:
8.0.0 , < 8.0.31
(custom)
|
|
| Microsoft | .NET 9.0 |
Affected:
9.0.0 , < 9.0.20
(custom)
|
|
| Microsoft | ASP.NET Core 10.0 |
Affected:
10.0 , < 10.0.12
(custom)
|
|
| Microsoft | ASP.NET Core 11.0 |
Affected:
11.0 , < 11.0 RC1
(custom)
|
|
| Microsoft | ASP.NET Core 8.0 |
Affected:
8.0 , < 8.0.31
(custom)
|
|
| Microsoft | ASP.NET Core 9.0 |
Affected:
9.0 , < 9.0.20
(custom)
|
|
| Microsoft | Microsoft Visual Studio 2022 version 17.14 |
Affected:
17.14.0 , < 17.14.40
(custom)
|
|
| Microsoft | Microsoft Visual Studio 2026 version 18.9 |
Affected:
18.9.0 , < 18.9.3
(custom)
|
Date Public
2026-09-08 14:00
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CVE-2026-68981 (GCVE-0-2026-68981)
Vulnerability from cvelistv5 – Published: 2026-08-03 19:59 – Updated: 2026-08-04 19:19
VLAI
EPSS
VEX
Title
Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests
Summary
Apache NiFi 1.5.0 through 2.10.0 support gzip-encoded HTTP requests for the application REST API using a Jersey encoding filter. The framework enforced a configurable maximum request size on the compressed payload rather than the decompressed output, allowing a malicious client to send crafted requests that could consume excessive amounts of memory. Upgrading to Apache NiFi 2.11.0 is the recommended mitigation, which relocates response compression to Jetty Server and disables decompression of gzip-encoded HTTP requests.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 19:19 UTC
CWE
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/vxrqn7poyf1wx6gdy… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache NiFi |
Affected:
1.5.0 , ≤ 2.10.0
(semver)
|
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.