Common Weakness Enumeration
CWE-407
Allowed-with-ReviewInefficient Algorithmic Complexity
Abstraction: Class · Status: Incomplete
An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.
261 vulnerabilities reference this CWE, most recent first.
CVE-2026-59094 (GCVE-0-2026-59094)
Vulnerability from cvelistv5 – Published: 2026-07-02 19:40 – Updated: 2026-07-14 22:03 X_Open Source
VLAI
EPSS
VEX
Title
Pathway - Unauthenticated Denial of Service via Exponential Glob Pattern Matching in Document Store
Summary
Pathway through 0.31.1, fixed in commit d09722e, document store applies a caller-supplied glob pattern to indexed document paths using a hand-written recursive matcher that branches two ways on each ** token without memoization, giving exponential worst-case complexity. The filepath_globpattern value is taken from the body of the unauthenticated HTTP endpoints /v1/retrieve, /v1/inputs and /v2/answer and compiled into a filter evaluated once per indexed document, with no length or **-count limit. A remote unauthenticated attacker can submit a short pattern containing many ** tokens to consume CPU for tens of seconds per request, and a small number of requests denies service.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 16:19 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/pathwaycom/pathway/issues/241 | technical-descriptionexploit |
| https://github.com/pathwaycom/pathway/pull/250 | issue-tracking |
| https://github.com/pathwaycom/pathway/commit/d097… | patch |
| https://www.vulncheck.com/advisories/pathway-unau… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| pathwaycom | pathway |
Affected:
0 , ≤ 0.31.1
(semver)
Unaffected: d09722eef03fd94bba701836eb4c7fbfa3d3b88e (git) cpe:2.3:a:pathwaycom:pathway:*:*:*:*:*:*:*:* |
Date Public
2026-06-12 00:00
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CVE-2026-58436 (GCVE-0-2026-58436)
Vulnerability from cvelistv5 – Published: 2026-08-13 16:44 – Updated: 2026-08-14 17:14
VLAI
EPSS
VEX
Title
ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests
Summary
ParseAcceptLanguage quadratic-time DoS via Locale middleware on unauthenticated requests
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 17:14 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/go-gitea/gitea/security/adviso… | vendor-advisory |
| https://github.com/go-gitea/gitea/releases/tag/v1.27.0 | release-notes |
| https://blog.gitea.com/gitea-1.27.0-is-released/ | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Gitea | Gitea Open Source Git Server |
Affected:
0 , ≤ 1.26.4
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CVE-2026-58226 (GCVE-0-2026-58226)
Vulnerability from cvelistv5 – Published: 2026-07-06 09:03 – Updated: 2026-07-06 14:04
VLAI
EPSS
VEX
Title
Unauthenticated denial-of-service via unbounded HPACK integer decoding in hpax
Summary
Inefficient Algorithmic Complexity vulnerability in elixir-mint hpax allows unauthenticated denial-of-service via unbounded HPACK integer decoding.
hpax decodes HPACK variable-length integers with no upper bound on the decoded value or the number of continuation octets. 'Elixir.HPAX.Types':decode_remaining_integer/3 accumulates the integer as int + (value <<< m), shifting by 7 more bits for each continuation octet and stopping only on a terminating octet or truncated input, never because the integer grew too large. Because BEAM integers are arbitrary precision, a run of N continuation octets builds an O(N)-bit bignum and re-adds into an ever-larger bignum on each step, so the total decoding cost is superlinear (about O(N^2)). An unauthenticated attacker who can send an HTTP/2 header block to a server using this decoder (reached through the 'Elixir.HPAX':decode/2 entry point) can supply a small header block that forces a large, attacker-controlled amount of CPU (and transient memory), a denial-of-service amplification.
This issue affects hpax from 0.1.1 before 1.0.4.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-06 12:49 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/elixir-mint/hpax/security/advi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-58226.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-58226 | related |
| https://github.com/elixir-mint/hpax/commit/1ba4bb… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| elixir-mint | hpax |
Affected:
0.1.1 , < 1.0.4
(semver)
cpe:2.3:a:elixir-mint:hpax:*:*:*:*:*:*:*:* |
|
| elixir-mint | hpax |
Affected:
56db437a7e2c515e3bdd770ac7947b02cd2390d0 , < 1ba4bb2dc91e80089cf89c73970ac3ded76f17eb
(git)
cpe:2.3:a:elixir-mint:hpax:*:*:*:*:*:*:*:* |
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CVE-2026-58059 (GCVE-0-2026-58059)
Vulnerability from cvelistv5 – Published: 2026-08-03 02:41 – Updated: 2026-08-03 15:32
VLAI
EPSS
VEX
Title
Quadratic-time escaping when stringifying X.500 distinguished names
Summary
In Bouncy Castle for Java before 1.85, Quadratic-time escaping when stringifying X.500 distinguished names. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (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 15:32 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
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/7bf20eea8… | patch |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
0 , < 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:
1.0.0 , < 1.0.2.7
(maven)
Affected: 2.0.0 , < 2.0.2 (maven) Affected: 2.1.0 , < 2.1.3 (maven) |
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CVE-2026-57480 (GCVE-0-2026-57480)
Vulnerability from cvelistv5 – Published: 2026-07-08 20:53 – Updated: 2026-07-09 13:43
VLAI
EPSS
VEX
Title
Parse Server: Denial of service via exponential-time processing of deeply nested query operators
Summary
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.12 and 8.6.82, deeply nested $or, $and, and $nor query condition operators in the REST API or LiveQuery query handling could trigger exponential-time processing in the internal query-traversal helper and block the Node.js event loop. This issue is fixed in versions 9.9.1-alpha.12 and 8.6.82.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 13:43 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/parse-community/parse-server/s… | x_refsource_CONFIRM |
| https://github.com/parse-community/parse-server/p… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/p… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/c… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/c… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/r… | x_refsource_MISC |
| https://github.com/parse-community/parse-server/r… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| parse-community | parse-server |
Affected:
>= 9.0.0-alpha.1, < 9.9.1-alpha.12
Affected: < 8.6.82 |
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CVE-2026-56669 (GCVE-0-2026-56669)
Vulnerability from cvelistv5 – Published: 2026-07-08 20:25 – Updated: 2026-07-10 15:02
VLAI
EPSS
VEX
Title
Elysia: Inefficient Algorithmic Complexity and Interpretation Conflict
Summary
Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation, and client-server communication. Prior to 1.4.29, Elysia uses getAll in form data normalization for multipart/form-data endpoints, causing the amount of work to grow quadratically with the number of unique key-value pairs and allowing CPU exhaustion. This issue is fixed in version 1.4.29.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 15:01 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/elysiajs/elysia/security/advis… | x_refsource_CONFIRM |
| https://github.com/elysiajs/elysia/commit/8358ff9… | x_refsource_MISC |
| https://gist.github.com/jviide/ea040eabe7bac05832… | x_refsource_MISC |
| https://github.com/elysiajs/elysia/releases/tag/1.4.29 | x_refsource_MISC |
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CVE-2026-55968 (GCVE-0-2026-55968)
Vulnerability from cvelistv5 – Published: 2026-07-27 11:06 – Updated: 2026-07-27 13:05
VLAI
EPSS
VEX
Title
Apache Thrift: Node.js quadratic-time DoS in server receive transports
Summary
Inefficient Algorithmic Complexity, Allocation of Resources Without Limits or Throttling vulnerability in Apache Thrift Node.js bindings.
This issue affects Apache Thrift: before 0.24.0.
Users are recommended to upgrade to version 0.24.0, which fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 13:04 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/7v3jhgwfbmhx42424… | vendor-advisory |
| https://lists.apache.org/thread/gxhhfyr6flr5vzr4q… | vendor-advisory |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Thrift |
Affected:
0 , < 0.24.0
(semver)
|
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CVE-2026-55685 (GCVE-0-2026-55685)
Vulnerability from cvelistv5 – Published: 2026-07-27 21:45 – Updated: 2026-07-28 13:40
VLAI
EPSS
VEX
Title
React Router: Unauthenticated Denial of Service via Inefficient Route Matching
Summary
React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been fixed in version 7.18.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-28 13:39 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/remix-run/react-router/securit… | x_refsource_CONFIRM |
| https://github.com/remix-run/react-router/securit… | x_refsource_MISC |
| https://github.com/remix-run/react-router/pull/15186 | x_refsource_MISC |
| https://github.com/remix-run/react-router/commit/… | x_refsource_MISC |
| https://github.com/remix-run/react-router/blob/ma… | x_refsource_MISC |
| https://github.com/remix-run/react-router/release… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| remix-run | react-router |
Affected:
>= 7.0.0, < 7.18.0
|
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CVE-2026-55206 (GCVE-0-2026-55206)
Vulnerability from cvelistv5 – Published: 2026-07-08 20:32 – Updated: 2026-07-09 14:26
VLAI
EPSS
VEX
Title
py7zr: O(n^2) algorithmic complexity DoS in PackInfo._read()
Summary
py7zr is a Python-based library and utility to support 7zip archive compression, decompression, encryption and decryption. Prior to 1.1.3, PackInfo._read() in archiveinfo.py used an O(n^2) cumulative sum pattern for attacker-controlled numstreams values parsed from archive headers, allowing a crafted .7z archive to cause excessive CPU consumption during SevenZipFile.init() before extraction. This issue is fixed in version 1.1.3.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 14:26 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/miurahr/py7zr/security/advisor… | x_refsource_CONFIRM |
| https://github.com/miurahr/py7zr/commit/d7aa3a197… | x_refsource_MISC |
| https://github.com/miurahr/py7zr/releases/tag/v1.1.3 | x_refsource_MISC |
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CVE-2026-55099 (GCVE-0-2026-55099)
Vulnerability from cvelistv5 – Published: 2026-08-25 19:27 – Updated: 2026-08-26 15:05
VLAI
EPSS
VEX
Title
icalendar: Algorithmic Complexity in Equality
Summary
icalendar is an RFC 5545 compatible parser and generator of iCalendar files for Python. From 7.1.0 until 7.1.3, the Component equality method in src/icalendar/cal/component.py compares nested subcomponents with two membership loops, and each membership test invokes the same method on child components, causing O(2^n) work relative to nesting depth. Component.from_ical accepts arbitrarily nested BEGIN:VEVENT blocks without a depth limit, so an attacker can submit a sub-kilobyte .ics file containing equal nested subtrees and trigger the cost when an application performs equality, inequality, membership, deduplication, test-assertion, round-trip, or normalization comparisons. Parsing alone does not trigger the issue, and comparisons that differ early short-circuit, but a few hundred bytes can pin a CPU core for minutes or indefinitely, causing denial of service in calendar sync or import endpoints, invite processing, and other comparison paths. This issue is fixed in version 7.1.3.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-26 15:05 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/collective/icalendar/security/… | x_refsource_CONFIRM |
| https://github.com/collective/icalendar/commit/b6… | x_refsource_MISC |
| https://github.com/collective/icalendar/commit/ca… | x_refsource_MISC |
| https://github.com/collective/icalendar/releases/… | x_refsource_MISC |
| http://www.openwall.com/lists/oss-security/2026/06/23/8 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| collective | icalendar |
Affected:
>= 7.1.0, < 7.1.3
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"description": "CWE-407: Inefficient Algorithmic Complexity",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-25T19:27:02.236Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/collective/icalendar/security/advisories/GHSA-cv84-9p8j-fj68",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/collective/icalendar/security/advisories/GHSA-cv84-9p8j-fj68"
},
{
"name": "https://github.com/collective/icalendar/commit/b6b2608ae3af6de40695b4e40f71847485aa0b49",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/collective/icalendar/commit/b6b2608ae3af6de40695b4e40f71847485aa0b49"
},
{
"name": "https://github.com/collective/icalendar/commit/cad40cd112c93fd142ec12cc5b37445a849b8a79",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/collective/icalendar/commit/cad40cd112c93fd142ec12cc5b37445a849b8a79"
},
{
"name": "https://github.com/collective/icalendar/releases/tag/v7.1.3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/collective/icalendar/releases/tag/v7.1.3"
}
],
"source": {
"advisory": "GHSA-cv84-9p8j-fj68",
"discovery": "UNKNOWN"
},
"title": "icalendar: Algorithmic Complexity in Equality"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-55099",
"datePublished": "2026-08-25T19:27:02.236Z",
"dateReserved": "2026-06-16T14:41:54.579Z",
"dateUpdated": "2026-08-26T15:05:26.062Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.