Common Weakness Enumeration
CWE-834
DiscouragedExcessive Iteration
Abstraction: Class · Status: Incomplete
The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.
131 vulnerabilities reference this CWE, most recent first.
CVE-2026-34043 (GCVE-0-2026-34043)
Vulnerability from cvelistv5 – Published: 2026-03-31 01:48 – Updated: 2026-03-31 13:55
VLAI
EPSS
VEX
Title
Serialize JavaScript has CPU Exhaustion Denial of Service via crafted array-like objects
Summary
Serialize JavaScript to a superset of JSON that includes regular expressions and functions. Prior to version 7.0.5, there is a Denial of Service (DoS) vulnerability caused by CPU exhaustion. When serializing a specially crafted "array-like" object (an object that inherits from Array.prototype but has a very large length property), the process enters an intensive loop that consumes 100% CPU and hangs indefinitely. This issue has been patched in version 7.0.5.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 13:55 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/yahoo/serialize-javascript/sec… | x_refsource_CONFIRM |
| https://github.com/yahoo/serialize-javascript/com… | x_refsource_MISC |
| https://github.com/yahoo/serialize-javascript/rel… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| yahoo | serialize-javascript |
Affected:
< 7.0.5
|
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CVE-2026-27025 (GCVE-0-2026-27025)
Vulnerability from cvelistv5 – Published: 2026-02-20 21:11 – Updated: 2026-02-24 18:40
VLAI
EPSS
VEX
Title
pypdf has possible long runtimes/large memory usage for large /ToUnicode streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.1, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the /ToUnicode entry of a font with unusually large values, for example during text extraction. This vulnerability is fixed in 6.7.1.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-24 18:39 UTC
CWE
- CWE-834 - Excessive Iteration
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3646 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/77d7b8d7cf… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.7.1 | x_refsource_MISC |
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CVE-2025-67726 (GCVE-0-2025-67726)
Vulnerability from cvelistv5 – Published: 2025-12-12 06:13 – Updated: 2025-12-18 18:48
VLAI
EPSS
VEX
Title
Tornado is Vulnerable to Quadratic DoS via Crafted Multipart Parameters
Summary
Tornado is a Python web framework and asynchronous networking library. Versions 6.5.2 and below use an inefficient algorithm when parsing parameters for HTTP header values, potentially causing a DoS. The _parseparam function in httputil.py is used to parse specific HTTP header values, such as those in multipart/form-data and repeatedly calls string.count() within a nested loop while processing quoted semicolons. If an attacker sends a request with a large number of maliciously crafted parameters in a Content-Disposition header, the server's CPU usage increases quadratically (O(n²)) during parsing. Due to Tornado's single event loop architecture, a single malicious request can cause the entire server to become unresponsive for an extended period. This issue is fixed in version 6.5.3.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-18 18:47 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tornadoweb/tornado/security/ad… | x_refsource_CONFIRM |
| https://github.com/tornadoweb/tornado/commit/7714… | x_refsource_MISC |
| https://github.com/tornadoweb/tornado/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tornadoweb | tornado |
Affected:
< 6.5.3
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CVE-2025-62707 (GCVE-0-2025-62707)
Vulnerability from cvelistv5 – Published: 2025-10-22 21:36 – Updated: 2025-10-23 15:41
VLAI
EPSS
VEX
Title
pypdf affected by possible infinite loop when reading DCT inline images without EOF marker
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page which has an inline image using the DCTDecode filter. This has been fixed in pypdf version 6.1.3.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-23 15:41 UTC
CWE
- CWE-834 - Excessive Iteration
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3501 | x_refsource_MISC |
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| https://github.com/py-pdf/pypdf/releases/tag/6.1.3 | x_refsource_MISC |
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CVE-2025-6714 (GCVE-0-2025-6714)
Vulnerability from cvelistv5 – Published: 2025-07-07 14:48 – Updated: 2025-07-07 19:11
VLAI
EPSS
VEX
Title
Incorrect Handling of incomplete data may prevent mongoS from Accepting New Connections
Summary
MongoDB Server's mongos component can become unresponsive to new connections due to incorrect handling of incomplete data. This affects MongoDB when configured with load balancer support. This issue affects MongoDB Server v6.0 prior to 6.0.23, MongoDB Server v7.0 prior to 7.0.20 and MongoDB Server v8.0 prior to 8.0.9
Required Configuration:
This affects MongoDB sharded clusters when configured with load balancer support for mongos using HAProxy on specified ports.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-07-07 19:11 UTC
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB Inc | MongoDB Server |
Affected:
6.0 , < 6.0.23
(custom)
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Date Public
2025-07-07 14:45
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CVE-2024-8049 (GCVE-0-2024-8049)
Vulnerability from cvelistv5 – Published: 2024-11-13 15:20 – Updated: 2024-11-13 18:28
VLAI
EPSS
VEX
Title
Telerik Document Processing Improper Handling of Memory Resources
Summary
In Progress Telerik Document Processing Libraries, versions prior to 2024 Q4 (2024.4.1106), importing a document with unsupported features can lead to excessive processing, leading to excessive use of computing resources leaving the application process unavailable.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-13 18:28 UTC
CWE
- CWE-834 - Excessive Iteration
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://docs.telerik.com/devtools/document-proces… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Progress Software | Telerik Document Processing Libraries |
Affected:
1.0.0 , < 2024.4.1106
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CVE-2024-4227 (GCVE-0-2024-4227)
Vulnerability from cvelistv5 – Published: 2025-01-15 08:00 – Updated: 2025-01-15 14:46
VLAI
EPSS
VEX
Title
gSOAP: Vulnerable to specially crafted unencrypted SDC messages
Summary
In Genivia gSOAP with a specific configuration an unauthenticated remote attacker can generate a high CPU load when forcing to parse an XML having duplicate ID attributes which can lead to a DoS.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-01-15 14:45 UTC
CWE
- CWE-834 - Excessive Iteration
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://sourceforge.net/p/gsoap2/code/HEAD/tree/c… | release-notes |
| https://www.genivia.com/advisory.html#Upgrade_rec… | vendor-advisory |
Impacted products
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CVE-2023-33953 (GCVE-0-2023-33953)
Vulnerability from cvelistv5 – Published: 2023-08-09 12:54 – Updated: 2024-09-27 18:40
VLAI
EPSS
VEX
Title
Denial-of-Service in gRPC
Summary
gRPC contains a vulnerability that allows hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases/ Three vectors were found that allow the following DOS attacks:
- Unbounded memory buffering in the HPACK parser
- Unbounded CPU consumption in the HPACK parser
The unbounded CPU consumption is down to a copy that occurred per-input-block in the parser, and because that could be unbounded due to the memory copy bug we end up with an O(n^2) parsing loop, with n selected by the client.
The unbounded memory buffering bugs:
- The header size limit check was behind the string reading code, so we needed to first buffer up to a 4 gigabyte string before rejecting it as longer than 8 or 16kb.
- HPACK varints have an encoding quirk whereby an infinite number of 0’s can be added at the start of an integer. gRPC’s hpack parser needed to read all of them before concluding a parse.
- gRPC’s metadata overflow check was performed per frame, so that the following sequence of frames could cause infinite buffering: HEADERS: containing a: 1 CONTINUATION: containing a: 2 CONTINUATION: containing a: 3 etc…
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-27 17:54 UTC
Assigner
References
1 reference
Impacted products
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CVE-2023-26513 (GCVE-0-2023-26513)
Vulnerability from cvelistv5 – Published: 2023-03-20 12:20 – Updated: 2025-02-13 14:32
VLAI
EPSS
VEX
Title
Apache Sling Resource Merger: Requests to certain paths managed by the Apache Sling Resource Merger can lead to DoS
Summary
Excessive Iteration vulnerability in Apache Software Foundation Apache Sling Resource Merger.This issue affects Apache Sling Resource Merger: from 1.2.0 before 1.4.2.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-13 14:32 UTC
CWE
- CWE-834 - Excessive Iteration
Assigner
References
1 reference
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| https://lists.apache.org/thread/xpcpo1y88ldss5hgm… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Sling Resource Merger |
Affected:
1.2.0 , < 1.4.2
(semver)
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CVE-2023-5632 (GCVE-0-2023-5632)
Vulnerability from cvelistv5 – Published: 2023-10-18 08:34 – Updated: 2024-09-13 14:50
VLAI
EPSS
VEX
Title
Unconditionally adding an event to the epoll causes excessive CPU consumption
Summary
In Eclipse Mosquito before and including 2.0.5, establishing a connection to the mosquitto server without sending data causes the EPOLLOUT event to be added, which results excessive CPU consumption. This could be used by a malicious actor to perform denial of service type attack. This issue is fixed in 2.0.6
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-13 14:50 UTC
CWE
- CWE-834 - Excessive Iteration
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/eclipse/mosquitto/pull/2053 | patchissue-tracking |
| https://github.com/eclipse/mosquitto/commit/18bad… | patch |
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.