Common Weakness Enumeration
CWE-674
Allowed-with-ReviewUncontrolled Recursion
Abstraction: Class · Status: Draft
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
875 vulnerabilities reference this CWE, most recent first.
CVE-2022-31052 (GCVE-0-2022-31052)
Vulnerability from cvelistv5 – Published: 2022-06-28 17:10 – Updated: 2025-04-23 18:05
VLAI
EPSS
VEX
Title
URL previews can crash Synapse media repositories or Synapse monoliths
Summary
Synapse is an open source home server implementation for the Matrix chat network. In versions prior to 1.61.1 URL previews of some web pages can exhaust the available stack space for the Synapse process due to unbounded recursion. This is sometimes recoverable and leads to an error for the request causing the problem, but in other cases the Synapse process may crash altogether. It is possible to exploit this maliciously, either by malicious users on the homeserver, or by remote users sending URLs that a local user's client may automatically request a URL preview for. Remote users are not able to exploit this directly, because the URL preview endpoint is authenticated. Deployments with `url_preview_enabled: false` set in configuration are not affected. Deployments with `url_preview_enabled: true` set in configuration **are** affected. Deployments with no configuration value set for `url_preview_enabled` are not affected, because the default is `false`. Administrators of homeservers with URL previews enabled are advised to upgrade to v1.61.1 or higher. Users unable to upgrade should set `url_preview_enabled` to false.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 14:04 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/synapse/security/ad… | x_refsource_CONFIRM |
| https://github.com/matrix-org/synapse/commit/fa13… | x_refsource_MISC |
| https://spec.matrix.org/v1.2/client-server-api/#g… | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | synapse |
Affected:
< 1.61.1
|
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CVE-2022-28773 (GCVE-0-2022-28773)
Vulnerability from cvelistv5 – Published: 2022-04-12 16:11 – Updated: 2024-08-03 06:03
VLAI
EPSS
VEX
Summary
Due to an uncontrolled recursion in SAP Web Dispatcher and SAP Internet Communication Manager, the application may crash, leading to denial of service, but can be restarted automatically.
Severity
No CVSS data available.
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.sap.com/documents/2022/02/fa865ea4-16… | x_refsource_MISC |
| https://launchpad.support.sap.com/#/notes/3111293 | x_refsource_MISC |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| SAP SE | SAP NetWeaver (Internet Communication Manager) |
Affected:
KRNL64NUC 7.22
Affected: 7.22EXT Affected: 7.49 Affected: KRNL64UC 7.22 Affected: 7.53 Affected: KERNEL 7.22 Affected: 7.77 Affected: 7.81 Affected: 7.85 Affected: 7.86 |
|
| SAP SE | SAP Web Dispatcher |
Affected:
7.53
Affected: 7.77 Affected: 7.81 Affected: 7.85 Affected: 7.86 |
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CVE-2022-27810 (GCVE-0-2022-27810)
Vulnerability from cvelistv5 – Published: 2022-10-06 00:00 – Updated: 2024-08-03 05:32
VLAI
EPSS
VEX
Summary
It was possible to trigger an infinite recursion condition in the error handler when Hermes executed specific maliciously formed JavaScript. This condition was only possible to trigger in dev-mode (when asserts were enabled). This issue affects Hermes versions prior to v0.12.0.
Severity
No CVSS data available.
CWE
- CWE-674 - Uncontrolled Recursion
References
1 reference
Impacted products
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CVE-2022-23974 (GCVE-0-2022-23974)
Vulnerability from cvelistv5 – Published: 2022-04-05 19:55 – Updated: 2024-08-03 03:59
VLAI
EPSS
VEX
Title
Pinot segment push endpoint has a vulnerability in unprotected environments
Summary
In 0.9.3 or older versions of Apache Pinot segment upload path allowed segment directories to be imported into pinot tables. In pinot installations that allow open access to the controller a specially crafted request can potentially be exploited to cause disruption in pinot service. Pinot release 0.10.0 fixes this. See https://docs.pinot.apache.org/basics/releases/0.10.0
Severity
No CVSS data available.
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/3dk8pf1n02p8oj2j3… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Pinot |
Affected:
Apache Pinot , ≤ 0.9.3
(custom)
|
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CVE-2022-23606 (GCVE-0-2022-23606)
Vulnerability from cvelistv5 – Published: 2022-02-22 22:20 – Updated: 2025-04-23 19:01
VLAI
EPSS
VEX
Title
Crash when a cluster is deleted in Envoy
Summary
Envoy is an open source edge and service proxy, designed for cloud-native applications. When a cluster is deleted via Cluster Discovery Service (CDS) all idle connections established to endpoints in that cluster are disconnected. A recursion was introduced in the procedure of disconnecting idle connections that can lead to stack exhaustion and abnormal process termination when a cluster has a large number of idle connections. This infinite recursion causes Envoy to crash. Users are advised to upgrade.
Severity
4.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 14:10 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/envoyproxy/envoy/security/advi… | x_refsource_CONFIRM |
| https://github.com/envoyproxy/envoy/commit/4b6dd3… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| envoyproxy | envoy |
Affected:
>= 1.20.0, < 1.20.2
Affected: >= 1.21.0, < 1.21.1 |
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CVE-2022-23516 (GCVE-0-2022-23516)
Vulnerability from cvelistv5 – Published: 2022-12-14 13:26 – Updated: 2025-11-03 21:45
VLAI
EPSS
VEX
Title
Uncontrolled Recursion in Loofah
Summary
Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.2.0, < 2.19.1 uses recursion for sanitizing CDATA sections, making it susceptible to stack exhaustion and raising a SystemStackError exception. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1. Users who are unable to upgrade may be able to mitigate this vulnerability by limiting the length of the strings that are sanitized.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-18 18:19 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| flavorjones | loofah |
Affected:
>= 2.2.0, < 2.19.1
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CVE-2022-23500 (GCVE-0-2022-23500)
Vulnerability from cvelistv5 – Published: 2022-12-14 07:07 – Updated: 2025-04-21 14:54
VLAI
EPSS
VEX
Title
TYPO3 subject to Uncontrolled Recursion resulting in Denial of Service
Summary
TYPO3 is an open source PHP based web content management system. In versions prior to 9.5.38, 10.4.33, 11.5.20, and 12.1.1, requesting invalid or non-existing resources via HTTP triggers the page error handler, which again could retrieve content to be shown as an error message from another page. This leads to a scenario in which the application is calling itself recursively - amplifying the impact of the initial attack until the limits of the web server are exceeded. This vulnerability is very similar, but not identical, to the one described in CVE-2021-21359. This issue is patched in versions 9.5.38 ELTS, 10.4.33, 11.5.20 or 12.1.1.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-21 14:53 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/TYPO3/typo3/security/advisorie… | x_refsource_CONFIRM |
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CVE-2022-3222 (GCVE-0-2022-3222)
Vulnerability from cvelistv5 – Published: 2022-09-15 00:00 – Updated: 2024-08-03 01:00
VLAI
EPSS
VEX
Title
Uncontrolled Recursion in gpac/gpac
Summary
Uncontrolled Recursion in GitHub repository gpac/gpac prior to 2.1.0-DEV.
Severity
5.3 (Medium)
CWE
- CWE-674 - Uncontrolled Recursion
References
3 references
Impacted products
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CVE-2022-1771 (GCVE-0-2022-1771)
Vulnerability from cvelistv5 – Published: 2022-05-18 00:00 – Updated: 2024-08-03 00:16
VLAI
EPSS
VEX
Title
Uncontrolled Recursion in vim/vim
Summary
Uncontrolled Recursion in GitHub repository vim/vim prior to 8.2.4975.
Severity
5.5 (Medium)
CWE
- CWE-674 - Uncontrolled Recursion
References
4 references
Impacted products
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CVE-2021-45105 (GCVE-0-2021-45105)
Vulnerability from cvelistv5 – Published: 2021-12-18 11:55 – Updated: 2026-05-29 11:45
VLAI
EPSS
VEX
Title
Apache Log4j2 does not always protect from infinite recursion in lookup evaluation
Summary
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-29 11:45 UTC
Assigner
References
13 references
| URL | Tags |
|---|---|
| https://logging.apache.org/log4j/2.x/security.html | x_refsource_MISC |
| https://psirt.global.sonicwall.com/vuln-detail/SN… | x_refsource_CONFIRM |
| https://www.kb.cert.org/vuls/id/930724 | third-party-advisoryx_refsource_CERT-VN |
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
| http://www.openwall.com/lists/oss-security/2021/12/19/1 | mailing-listx_refsource_MLIST |
| https://www.debian.org/security/2021/dsa-5024 | vendor-advisoryx_refsource_DEBIAN |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://security.netapp.com/advisory/ntap-2021121… | x_refsource_CONFIRM |
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://www.oracle.com/security-alerts/cpujan2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpuapr2022.html | x_refsource_MISC |
| https://www.oracle.com/security-alerts/cpujul2022.html | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Log4j2 |
Affected:
log4j-core , < 2.17.0
(custom)
|
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},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "Apache Log4j2",
"version": {
"version_data": [
{
"version_affected": "\u003c",
"version_name": "log4j-core",
"version_value": "2.17.0"
},
{
"version_affected": "\u003e=",
"version_name": "log4j-core",
"version_value": "2.13.0"
},
{
"version_affected": "\u003c",
"version_name": "log4j-core",
"version_value": "2.12.3"
},
{
"version_affected": "\u003e=",
"version_name": "log4j-core",
"version_value": "2.4"
},
{
"version_affected": "\u003c",
"version_name": "log4j-core",
"version_value": "2.3.1"
},
{
"version_affected": "\u003e=",
"version_name": "log4j-core",
"version_value": "2.0-alpha1"
}
]
}
}
]
},
"vendor_name": "Apache Software Foundation"
}
]
}
},
"credit": [
{
"lang": "eng",
"value": "Independently discovered by Hideki Okamoto of Akamai Technologies, Guy Lederfein of Trend Micro Research working with Trend Micro\u2019s Zero Day Initiative, and another anonymous vulnerability researcher"
}
],
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1."
}
]
},
"generator": {
"engine": "Vulnogram 0.0.9"
},
"impact": [
{
"other": "high"
}
],
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-20 Improper Input Validation"
}
]
},
{
"description": [
{
"lang": "eng",
"value": "CWE-674: Uncontrolled Recursion"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://logging.apache.org/log4j/2.x/security.html",
"refsource": "MISC",
"url": "https://logging.apache.org/log4j/2.x/security.html"
},
{
"name": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032",
"refsource": "CONFIRM",
"url": "https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032"
},
{
"name": "VU#930724",
"refsource": "CERT-VN",
"url": "https://www.kb.cert.org/vuls/id/930724"
},
{
"name": "20211210 Vulnerabilities in Apache Log4j Library Affecting Cisco Products: December 2021",
"refsource": "CISCO",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd"
},
{
"name": "[oss-security] 20211218 CVE-2021-45105: Apache Log4j2 does not always protect from infinite recursion in lookup evaluation",
"refsource": "MLIST",
"url": "http://www.openwall.com/lists/oss-security/2021/12/19/1"
},
{
"name": "DSA-5024",
"refsource": "DEBIAN",
"url": "https://www.debian.org/security/2021/dsa-5024"
},
{
"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf",
"refsource": "CONFIRM",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf"
},
{
"name": "https://security.netapp.com/advisory/ntap-20211218-0001/",
"refsource": "CONFIRM",
"url": "https://security.netapp.com/advisory/ntap-20211218-0001/"
},
{
"name": "https://www.zerodayinitiative.com/advisories/ZDI-21-1541/",
"refsource": "MISC",
"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-1541/"
},
{
"name": "https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf",
"refsource": "CONFIRM",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf"
},
{
"name": "https://www.oracle.com/security-alerts/cpujan2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
},
{
"name": "https://www.oracle.com/security-alerts/cpujul2022.html",
"refsource": "MISC",
"url": "https://www.oracle.com/security-alerts/cpujul2022.html"
}
]
},
"source": {
"defect": [
"LOG4J2-3230"
],
"discovery": "UNKNOWN"
},
"work_around": [
{
"lang": "en",
"value": "Implement one of the following mitigation techniques:\n\n* Java 8 (or later) users should upgrade to release 2.17.0.\n\nAlternatively, this can be mitigated in configuration:\n\n* In PatternLayout in the logging configuration, replace Context Lookups like `${ctx:loginId}` or `$${ctx:loginId}` with Thread Context Map patterns (%X, %mdc, or %MDC).\n* Otherwise, in the configuration, remove references to Context Lookups like `${ctx:loginId}` or `$${ctx:loginId}` where they originate \nfrom sources external to the application such as HTTP headers or user input."
}
]
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2021-45105",
"datePublished": "2021-12-18T11:55:08.000Z",
"dateReserved": "2021-12-16T00:00:00.000Z",
"dateUpdated": "2026-05-29T11:45:26.064Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Mitigation
Implementation
Ensure that an end condition will be reached under all logic conditions. The end condition may include checking against the depth of recursion and exiting with an error if the recursion goes too deep. The complexity of the end condition contributes to the effectiveness of this action.
Mitigation
Implementation
Increase the stack size.
CAPEC-230: Serialized Data with Nested Payloads
Applications often need to transform data in and out of a data format (e.g., XML and YAML) by using a parser. It may be possible for an adversary to inject data that may have an adverse effect on the parser when it is being processed. Many data format languages allow the definition of macro-like structures that can be used to simplify the creation of complex structures. By nesting these structures, causing the data to be repeatedly substituted, an adversary can cause the parser to consume more resources while processing, causing excessive memory consumption and CPU utilization.
CAPEC-231: Oversized Serialized Data Payloads
An adversary injects oversized serialized data payloads into a parser during data processing to produce adverse effects upon the parser such as exhausting system resources and arbitrary code execution.