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.
740 vulnerabilities reference this CWE, most recent first.
CVE-2026-63760 (GCVE-0-2026-63760)
Vulnerability from cvelistv5 – Published: 2026-07-20 12:04 – Updated: 2026-07-28 01:05
VLAI
EPSS
VEX
Title
SurrealDB before 3.1.0 Denial of Service via JSON Parser
Summary
SurrealDB before 3.1.0 fails to enforce the configured recursion depth limit in the value and JSON parser when processing nested braces, brackets, or parentheses. Unauthenticated attackers can send deeply nested JSON payloads to the WebSocket /rpc endpoint to exhaust server memory and crash the process.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 12:51 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/surrealdb/surrealdb/security/a… | vendor-advisory |
| https://www.vulncheck.com/advisories/surrealdb-be… | third-party-advisory |
Impacted products
Date Public
2026-05-27 00:00
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CVE-2026-63759 (GCVE-0-2026-63759)
Vulnerability from cvelistv5 – Published: 2026-07-20 12:04 – Updated: 2026-07-28 01:05
VLAI
EPSS
VEX
Title
SurrealDB before 3.1.0 Denial of Service nested type annotations
Summary
SurrealDB before 3.1.0 fails to enforce recursion depth limits in the type/kind parser when processing nested type annotations. Authenticated attackers can send queries with deeply nested type annotations to exhaust server memory and crash the process.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 18:54 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/surrealdb/surrealdb/security/a… | vendor-advisory |
| https://www.vulncheck.com/advisories/surrealdb-be… | third-party-advisory |
Impacted products
Date Public
2026-05-27 00:00
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CVE-2026-63737 (GCVE-0-2026-63737)
Vulnerability from cvelistv5 – Published: 2026-07-20 12:04 – Updated: 2026-07-28 01:05
VLAI
EPSS
VEX
Title
SurrealDB before 3.1.5 Denial of Service via deep operator chains
Summary
SurrealDB versions before 3.1.5 contain a denial of service vulnerability where authenticated users can crash the server with queries containing long chains of operators. Attackers can submit queries with tens of thousands of chained operators that create unbounded expression trees, causing stack overflow during query processing and aborting the entire process.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 13:51 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/surrealdb/surrealdb/security/a… | vendor-advisory |
| https://www.vulncheck.com/advisories/surrealdb-be… | third-party-advisory |
Impacted products
Date Public
2026-06-19 00:00
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CVE-2026-63462 (GCVE-0-2026-63462)
Vulnerability from cvelistv5 – Published: 2026-08-21 18:12 – Updated: 2026-08-25 17:33
VLAI
EPSS
VEX
Title
Unleash: Unauthenticated single-request DoS via OpenAPI validation error formatter
Summary
Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the shared OpenAPI validation error path in src/lib/error/bad-data-error.ts passes a raw request value from lodash.get to JSON.stringify in genericErrorMessage and fromOpenApiValidationErrors without guarding stack exhaustion. An unauthenticated attacker can send a roughly 10 KB JSON value nested thousands of levels deep to POST /edge/validate, POST /edge/issue-token, or another OpenAPI-validated endpoint, causing RangeError: Maximum call stack size exceeded in openAPIValidationMiddleware and terminating the Node process because no uncaughtException handler recovers it. Replaying the request can sustain a complete service outage. This issue is fixed in versions 7.5.2, 7.6.5, and 8.0.2.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 17:32 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/Unleash/unleash/security/advis… | x_refsource_CONFIRM |
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| https://github.com/Unleash/unleash/commit/d862562… | x_refsource_MISC |
| https://github.com/Unleash/unleash/releases/tag/v7.5.2 | x_refsource_MISC |
| https://github.com/Unleash/unleash/releases/tag/v7.6.5 | x_refsource_MISC |
| https://github.com/Unleash/unleash/releases/tag/v8.0.2 | x_refsource_MISC |
Impacted products
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CVE-2026-63144 (GCVE-0-2026-63144)
Vulnerability from cvelistv5 – Published: 2026-07-21 22:26 – Updated: 2026-07-22 13:27
VLAI
EPSS
VEX
Title
Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
Summary
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a specially crafted search request submitted by a low-privileged authenticated user. A user with read-level index access can submit a request that triggers unbounded recursive processing within the Elasticsearch query evaluation component, causing a fatal error that terminates the affected node. In single-node deployments, this results in complete service outage; in multi-node clusters, it causes repeated node restarts and sustained availability degradation.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 13:23 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Elasticsearch |
Affected:
9.4.0 , ≤ 9.4.3
(semver)
Affected: 9.3.0 , ≤ 9.3.7 (semver) Affected: 8.19.0 , ≤ 8.19.18 (semver) |
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CVE-2026-62296 (GCVE-0-2026-62296)
Vulnerability from cvelistv5 – Published: 2026-08-07 20:03 – Updated: 2026-08-10 13:29
VLAI
EPSS
VEX
Title
HAPI FHIR: XHTML narrative parser unbounded recursion causes StackOverflow denial of service
Summary
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.11, XhtmlParser.java imposes no maximum element nesting depth, so a deeply nested text.div narrative triggers unbounded recursion between parseElementInner() and parseElement(), raising a StackOverflowError. An attacker who can submit FHIR resources containing such narratives can thus crash a parsing or validation worker thread, affecting validator services and any application that parses attacker-supplied FHIR JSON or XML. This issue is fixed in version 6.9.11.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 13:29 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/hapifhir/org.hl7.fhir.core/sec… | x_refsource_CONFIRM |
| https://github.com/hapifhir/org.hl7.fhir.core/com… | x_refsource_MISC |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| hapifhir | org.hl7.fhir.core |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.r5 |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.utilities |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.validation |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli |
Affected:
< 6.9.11
|
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CVE-2026-62295 (GCVE-0-2026-62295)
Vulnerability from cvelistv5 – Published: 2026-08-07 19:36 – Updated: 2026-08-13 18:38
VLAI
EPSS
VEX
Title
HAPI FHIR: JSON utility parser unbounded recursion causes StackOverflow denial of service
Summary
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.11, the JSON utility parser in org.hl7.fhir.utilities.json.parser.JsonParser enforces no maximum nesting depth for arrays or objects. As a result, a small but deeply nested, syntactically valid FHIR JSON document can trigger unbounded readArray() or readObject() recursion, raising a StackOverflowError before structural validation runs. An attacker who can submit JSON resources for validation can thus crash the request thread, and services that do not isolate StackOverflowError safely may experience worker loss or process instability — a denial-of-service condition. This issue is fixed in version 6.9.11.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 18:38 UTC
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/hapifhir/org.hl7.fhir.core/sec… | x_refsource_CONFIRM |
| https://github.com/hapifhir/org.hl7.fhir.core/com… | x_refsource_MISC |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| hapifhir | org.hl7.fhir.core |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.r5 |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.utilities |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.validation |
Affected:
< 6.9.11
|
|
| hapifhir | ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli |
Affected:
< 6.9.11
|
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CVE-2026-61483 (GCVE-0-2026-61483)
Vulnerability from cvelistv5 – Published: 2026-08-05 06:36 – Updated: 2026-08-06 17:44 Unsupported When Assigned
VLAI
EPSS
VEX
Title
Apache Lucy: QueryParser unbounded recursion on deeply-nested query -> C-stack-overflow DoS
Summary
** UNSUPPORTED WHEN ASSIGNED ** Uncontrolled Recursion vulnerability in Apache Lucy.
This issue affects Apache Lucy: all versions.
As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.
NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 17:44 UTC
CWE
- CWE-674 - Uncontrolled Recursion
Assigner
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Lucy |
Affected:
0 , ≤ *
(semver)
|
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CVE-2026-59927 (GCVE-0-2026-59927)
Vulnerability from cvelistv5 – Published: 2026-07-08 16:24 – Updated: 2026-07-08 19:45
VLAI
EPSS
VEX
Title
Mistune directives/include: mutual `.. include::` recursion crashes the renderer with `RecursionError`, denial of service via two attacker-controlled markdown files
Summary
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the Include directive in src/mistune/directives/include.py detects only direct self-includes and not indirect cycles, allowing two markdown files that include each other to trigger unbounded recursion, raise RecursionError, and crash the rendering request. This issue is fixed in version 3.3.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-08 19:45 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/lepture/mistune/security/advis… | x_refsource_CONFIRM |
| https://github.com/lepture/mistune/commit/1bef343… | x_refsource_MISC |
| https://github.com/lepture/mistune/releases/tag/v3.3.0 | x_refsource_MISC |
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CVE-2026-59645 (GCVE-0-2026-59645)
Vulnerability from cvelistv5 – Published: 2026-08-03 00:49 – Updated: 2026-08-03 13:35
VLAI
EPSS
VEX
Title
OER parser recurses without depth limit on self-referential IEEE 1609.2 schema
Summary
In Bouncy Castle for Java before 1.85, OER parser recurses without depth limit on self-referential IEEE 1609.2 schema. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcutil-fips 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 13:35 UTC
CWE
- CWE-674 - Uncontrolled Recursion
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/822b2478b… | patch |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
1.70 , < 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:
2.0.0 , < 2.0.7
(maven)
Affected: 2.1.0 , < 2.1.7 (maven) |
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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.