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.
260 vulnerabilities reference this CWE, most recent first.
CVE-2026-31933 (GCVE-0-2026-31933)
Vulnerability from cvelistv5 – Published: 2026-04-02 14:03 – Updated: 2026-04-03 16:01
VLAI
EPSS
VEX
Title
Suricata stream: quadratic complexity in stream inspection
Summary
Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, specially crafted traffic can cause Suricata to slow down, affecting performance in IDS mode. This issue has been patched in versions 7.0.15 and 8.0.4.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 16:00 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/OISF/suricata/security/advisor… | x_refsource_CONFIRM |
| https://redmine.openinfosecfoundation.org/issues/8272 | x_refsource_MISC |
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CVE-2026-31932 (GCVE-0-2026-31932)
Vulnerability from cvelistv5 – Published: 2026-04-02 14:02 – Updated: 2026-04-02 18:33
VLAI
EPSS
VEX
Title
Suricata krb5: quadratic complexity in krb5 buffering
Summary
Suricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, inefficiency in KRB5 buffering can lead to performance degradation. This issue has been patched in versions 7.0.15 and 8.0.4.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 18:33 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/OISF/suricata/security/advisor… | x_refsource_CONFIRM |
| https://redmine.openinfosecfoundation.org/issues/8305 | x_refsource_MISC |
Impacted products
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CVE-2026-28804 (GCVE-0-2026-28804)
Vulnerability from cvelistv5 – Published: 2026-03-06 06:46 – Updated: 2026-03-06 16:05
VLAI
EPSS
VEX
Title
pypdf: Inefficient decoding of ASCIIHexDecode streams
Summary
pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-06 15:59 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/3666 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/648c627d26… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.7.5 | x_refsource_MISC |
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CVE-2026-27903 (GCVE-0-2026-27903)
Vulnerability from cvelistv5 – Published: 2026-02-26 01:06 – Updated: 2026-02-26 19:20
VLAI
EPSS
VEX
Title
minimatch has a ReDoS: matchOne() combinatorial backtracking via multiple non-adjacent GLOBSTAR segments
Summary
minimatch is a minimal matching utility for converting glob expressions into JavaScript RegExp objects. Prior to version 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.3, `matchOne()` performs unbounded recursive backtracking when a glob pattern contains multiple non-adjacent `**` (GLOBSTAR) segments and the input path does not match. The time complexity is O(C(n, k)) -- binomial -- where `n` is the number of path segments and `k` is the number of globstars. With k=11 and n=30, a call to the default `minimatch()` API stalls for roughly 5 seconds. With k=13, it exceeds 15 seconds. No memoization or call budget exists to bound this behavior. Any application where an attacker can influence the glob pattern passed to `minimatch()` is vulnerable. The realistic attack surface includes build tools and task runners that accept user-supplied glob arguments (ESLint, Webpack, Rollup config), multi-tenant systems where one tenant configures glob-based rules that run in a shared process, admin or developer interfaces that accept ignore-rule or filter configuration as globs, and CI/CD pipelines that evaluate user-submitted config files containing glob patterns. An attacker who can place a crafted pattern into any of these paths can stall the Node.js event loop for tens of seconds per invocation. The pattern is 56 bytes for a 5-second stall and does not require authentication in contexts where pattern input is part of the feature. Versions 10.2.3, 9.0.7, 8.0.6, 7.4.8, 6.2.2, 5.1.8, 4.2.5, and 3.1.3 fix the issue.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-26 19:20 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/isaacs/minimatch/security/advi… | x_refsource_CONFIRM |
Impacted products
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CVE-2026-19668 (GCVE-0-2026-19668)
Vulnerability from cvelistv5 – Published: 2026-09-16 14:12 – Updated: 2026-09-17 18:40
VLAI
EPSS
VEX
Title
Resource Exhaustion via Excessive DNSSEC Cryptographic Material Matching
Summary
A BIND recursive resolver may experience excessive resource consumption if it encounters large numbers of a particular kind of invalid DNSSEC record. Default limits on "max-records-per-type" and "max-types-per-name" help mitigate the exposure.
This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 18:40 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
isc
CNA
References
3 references
| URL | Tags |
|---|---|
| https://kb.isc.org/docs/cve-2026-19668 | vendor-advisory |
| https://downloads.isc.org/isc/bind9/9.20.29 | patch |
| https://downloads.isc.org/isc/bind9/9.21.26 | patch |
Impacted products
1 product
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|---|---|---|---|
| ISC | BIND 9 |
Affected:
9.11.0 , ≤ 9.18.50
(custom)
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Date Public
2026-09-16 00:00
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CVE-2026-19630 (GCVE-0-2026-19630)
Vulnerability from cvelistv5 – Published: 2026-10-21 12:41 – Updated: 2026-10-21 17:19
VLAI
EPSS
VEX
Title
Amplified resource exhaustion in inbound message processing
Summary
In a BIND resolver, inbound DNS protocol messages with a particular structure will result in additional processing, with no limit imposed by BIND. A DNS message with a maliciously large number of such structures will cause BIND to consume disproportionate amounts of CPU time and memory during processing.
This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 15:19 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
isc
CNA
References
3 references
| URL | Tags |
|---|---|
| https://kb.isc.org/docs/cve-2026-19630 | vendor-advisory |
| https://downloads.isc.org/isc/bind9/9.20.30 | patch |
| https://downloads.isc.org/isc/bind9/9.21.27 | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ISC | BIND 9 |
Affected:
9.11.0 , ≤ 9.18.50
(custom)
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Date Public
2026-10-21 00:00
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CVE-2026-16762 (GCVE-0-2026-16762)
Vulnerability from cvelistv5 – Published: 2026-10-23 08:58 – Updated: 2026-10-23 10:56
VLAI
EPSS
VEX
Title
Denial-of-service vulnerability in the Qt Core QXmlStream parser (QXmlStreamReader) impacts Qt
Summary
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Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 10:43 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
Qt
CNA
References
3 references
Impacted products
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CVE-2026-13311 (GCVE-0-2026-13311)
Vulnerability from cvelistv5 – Published: 2026-06-25 04:48 – Updated: 2026-06-25 12:49
VLAI
EPSS
VEX
Title
shell-quote parse() is quadratic in token count, enabling denial of service
Summary
shell-quote prior to 1.8.5 finalizes parsed tokens in parse() using Array.prototype.concat as a reduce accumulator, which reallocates and copies the entire growing array on every iteration. As a result parse() runs in O(n^2) time relative to the number of input tokens. An attacker who can supply an attacker-controlled string to any code path that calls parse() (no shell metacharacters are required; plain space-separated words suffice) can block the single-threaded Node.js event loop for an extended period with a small input, resulting in a denial of service. There is no code execution or data disclosure; impact is to availability only. Fixed in 1.8.5.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 12:49 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
harborist
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/ljharb/shell-quote/security/ad… | vendor-advisory |
| https://www.npmjs.com/package/shell-quote | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ljharb | shell-quote |
Affected:
0 , ≤ 1.8.4
(semver)
|
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CVE-2026-13149 (GCVE-0-2026-13149)
Vulnerability from cvelistv5 – Published: 2026-06-30 08:30 – Updated: 2026-07-08 11:38
VLAI
EPSS
VEX
Summary
brace-expansion through 5.0.6 is vulnerable to denial of service. The expand() function exhibits exponential-time complexity in the number of consecutive non-expanding '{}' brace groups. An attacker who passes a crafted string to expand(), directly or transitively, can cause significant CPU consumption and event-loop blocking. The max option does not mitigate this, as it bounds the output size rather than the recursion work.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 12:43 UTC
Assigner
seal
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| juliangruber | brace-expansion |
Affected:
0 , ≤ 5.0.6
(semver)
|
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CVE-2026-13064 (GCVE-0-2026-13064)
Vulnerability from cvelistv5 – Published: 2026-07-22 19:17 – Updated: 2026-07-23 19:09
VLAI
EPSS
VEX
Title
MongoDB $jsonSchema Query Operator Excessive CPU Consumption Leading to Denial of Service
Summary
Certain query operations involving deeply nested $jsonSchema constructs can trigger disproportionate CPU consumption in affected MongoDB deployments, potentially leading to resource exhaustion. The resulting CPU-bound operation cannot be interrupted through standard administrative controls.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 19:09 UTC
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
mongodb
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MongoDB | MongoDB Server |
Affected:
8.0 , < 8.0.28
(semver)
Affected: 8.2.0 , < 8.2.12 (semver) Affected: 8.3.0 , < 8.3.7 (semver) |
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No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.