Common Weakness Enumeration
CWE-754
Allowed-with-ReviewImproper Check for Unusual or Exceptional Conditions
Abstraction: Class · Status: Incomplete
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
971 vulnerabilities reference this CWE, most recent first.
CVE-2026-65838 (GCVE-0-2026-65838)
Vulnerability from cvelistv5 – Published: 2026-09-14 20:01 – Updated: 2026-09-15 13:55
VLAI
EPSS
VEX
Title
Skipper: an oversized declared-`Content-Length` body still hands OPA an empty `parsed_body`, so deny-on-presence Rego policies fail OPEN while the full payload reaches upstream
Summary
Skipper is an HTTP router and reverse proxy for service composition. Prior to 0.27.35, the opaAuthorizeRequestWithBody filter in filters/openpolicyagent/openpolicyagent.go can allow an oversized declared Content-Length request to bypass a deny-on-presence Rego policy because ExtractHttpBodyOptionally leaves OPA with an empty parsed_body while forwarding the complete request body upstream. This incomplete remediation of CVE-2026-50197 affects deployments that authorize request-body content and exceed -open-policy-agent-max-request-body-size, which defaults to 1 MB. Policy logic that does not reject input.attributes.request.http.truncated_body can therefore fail open and permit a forbidden payload to reach the protected service, while small bodies and the previously fixed chunked-body case are evaluated normally. This issue is fixed in version 0.27.35.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 13:26 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/zalando/skipper/security/advis… | x_refsource_CONFIRM |
| https://github.com/zalando/skipper/commit/2cfceab… | x_refsource_MISC |
| https://github.com/zalando/skipper/releases/tag/v… | x_refsource_MISC |
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CVE-2026-63754 (GCVE-0-2026-63754)
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 LIVE Query
Summary
SurrealDB versions before 3.1.0 contain a denial of service vulnerability where malicious LIVE queries with WHERE clauses that evaluate to errors cause all CREATE, UPDATE, and DELETE operations on the watched table to fail. An authenticated user with only select permission can prevent write operations on a table for any user, including root, by registering a LIVE query that triggers evaluation errors until the query is killed or the session ends.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 12:52 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
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-2026-59693 (GCVE-0-2026-59693)
Vulnerability from cvelistv5 – Published: 2026-08-11 12:20 – Updated: 2026-08-11 18:08
VLAI
EPSS
VEX
Summary
A vulnerability has been identified in Desigo DXR2 (All versions < V01.21.233.16-7862), Desigo PXC3 (All versions < V01.21.233.16-7862), Desigo PXC4 (All versions < V02.21.194.36-2715), Desigo PXC5.E003 (All versions < V02.21.194.36-2715), Desigo PXC5.E24 (All versions < V02.21.194.36-2715), Desigo PXC7 (All versions < V02.21.194.36-2715). The affected devices are vulnerable to a denial-of-service (DoS) vulnerability. An attacker can exploit this issue by sending a malformed BACnet packet, causing the device to stop responding to BACnet queries. Recovery requires a device reset or reboot to restore normal functionality.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 18:08 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
1 reference
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | Desigo DXR2 |
Affected:
0 , < V01.21.233.16-7862
(custom)
|
|
| Siemens | Desigo PXC3 |
Affected:
0 , < V01.21.233.16-7862
(custom)
|
|
| Siemens | Desigo PXC4 |
Affected:
0 , < V02.21.194.36-2715
(custom)
|
|
| Siemens | Desigo PXC5.E003 |
Affected:
0 , < V02.21.194.36-2715
(custom)
|
|
| Siemens | Desigo PXC5.E24 |
Affected:
0 , < V02.21.194.36-2715
(custom)
|
|
| Siemens | Desigo PXC7 |
Affected:
0 , < V02.21.194.36-2715
(custom)
|
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CVE-2026-59112 (GCVE-0-2026-59112)
Vulnerability from cvelistv5 – Published: 2026-08-10 13:57 – Updated: 2026-08-10 17:55
VLAI
EPSS
VEX
Title
Signature validation vulnerability affecting DigiDoc applications
Summary
Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS. This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-10 17:55 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/open-eid/libdigidocpp/pull/690 | patch |
| https://www.id.ee/en/article/ria-soovitab-kasutaj… | vendor-advisory |
| https://www.ria.ee/blogi/digidoc-rakendustes-esin… | government-resource |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Estonian Information System Authority (RIA) | libdigidocpp |
Affected:
4.1.0 , < 4.2.1
(semver)
|
|
| Estonian Information System Authority (RIA) | DigiDoc4 |
Affected:
4.7.0 , < 4.8.2
(semver)
|
|
| Estonian Information System Authority (RIA) | DigiDoc |
Affected:
2.7.0 , < 2.7.2
(semver)
|
|
| Estonian Information System Authority (RIA) | DigiDoc |
Affected:
2.8.0 , < 2.8.1
(semver)
|
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CVE-2026-57031 (GCVE-0-2026-57031)
Vulnerability from cvelistv5 – Published: 2026-07-09 21:13 – Updated: 2026-07-10 14:37
VLAI
EPSS
VEX
Title
Junos OS: MX Series: For subscribers configured on static interfaces, input filters are not in effect
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (PFE) of Juniper Networks Junos OS on MX Series allows adjacent subscribers to bypass configured firewall filters.
On MX Series devices with MPC10/11, LC4800/9600, and MX304 with subscribers configured on static interfaces, ingress firewall filters are not enforced, so that neither protocol level nor upstream bandwidth limitation are in effect.
This issue affects Junos OS on MX with MPC10/11, LC4800/9600/4802, and MX304:
* 23.2 versions from 23.2R2-S1 before 23.2R2-S7,
* 23.4 versions from 23.4R2 before 23.4R2-S7,
* 24.2 versions before 24.2R2-S3,
* 24.4 versions before 24.4R2-S2,
* 25.2 versions before 25.2R2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 14:35 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://supportportal.juniper.net/JSA110091 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
23.2R2-S1 , < 23.2R2-S7
(custom)
Affected: 23.4R2 , < 23.4R2-S7 (custom) Affected: 24.2 , < 24.2R2-S3 (custom) Affected: 24.4 , < 24.4R2-S2 (custom) Affected: 25.2 , < 25.2R2 (custom) |
Date Public
2026-07-08 16:00
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CVE-2026-57022 (GCVE-0-2026-57022)
Vulnerability from cvelistv5 – Published: 2026-07-09 21:06 – Updated: 2026-07-10 14:31
VLAI
EPSS
VEX
Title
Junos OS: MX Series with SPC3, SRX Series: Specific packet in response to a TCP connection establishment by the affected device can crash the PFE
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on MX with SPC3 and SRX Series allows an unauthenticated, network-based attacker to cause a Denial-of-Service (DoS).
When an affected device initiates a TCP connection to an attacker-controlled system that responds with a specific packet, this causes a PFE crash and restart, which affects all services until the system has automatically recovered.
This issue can happen among others in the following scenarios: ALG, SSL proxy, UTM, RTLOG, AppQoE probing, AAMW, ICAP, URL filtering.
This issue affects Junos OS on MX Series with SPC3, SRX5k Series with SPC3, SRX1600 Series, SRX2300 Series, SRX4000 Series, and vSRX Series:
* all versions before 23.2R2-S4,
* 23.4 versions before 23.4R2-S5,
* 24.2 versions before 24.2R2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 14:31 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://supportportal.juniper.net/JSA110082 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 23.2R2-S4
(custom)
Affected: 23.4 , < 23.4R2-S5 (custom) Affected: 24.2 , < 24.2R2 (custom) |
Date Public
2026-07-08 16:00
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CVE-2026-57020 (GCVE-0-2026-57020)
Vulnerability from cvelistv5 – Published: 2026-07-09 21:05 – Updated: 2026-07-10 13:29
VLAI
EPSS
VEX
Title
Junos OS: QFX10000 Series: IPv6 multicast traffic received on non-IRB interfaces causes a multicast flood
Summary
An Improper Check for Unusual or Exceptional Conditions vulnerability in the packet forwarding engine (pfe) of Juniper Networks Junos OS on QFX10000 Series allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS).
On all QFX10000 platforms in an EVPN-VxLAN scenario, if an attacker sends IPv6 multicast traffic and these packets reach the non-IRB interface of a spine switch it floods the packet to other spines and all Ethernet Segment Identifier (ESI) leaf switches. This flooding causes the packet to be forwarded in a endless loop, which can lead to saturation of the involved links and in turn impact to legitimate traffic.
This issue affects Junos OS on QFX10000 Series:
* all versions before 23.2R2-S7,
* 23.4 versions before 23.4R2-S8,
* 24.2 versions before 24.2R2-S4,
* 24.4 versions before 24.4R2-S4.
This issue does not affect Junos version after 24.4 as the QFX10000 Series devices are not supported on newer versions anymore.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 13:28 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://supportportal.juniper.net/JSA110080 | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
0 , < 23.2R2-S7
(custom)
Affected: 23.4 , < 23.4R2-S8 (custom) Affected: 24.2 , < 24.2R2-S4 (custom) Affected: 24.4 , < 24.4R2-S4 (custom) |
Date Public
2026-07-08 16:00
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CVE-2026-56812 (GCVE-0-2026-56812)
Vulnerability from cvelistv5 – Published: 2026-07-07 15:22 – Updated: 2026-07-07 16:11
VLAI
EPSS
VEX
Title
Phoenix JavaScript presence client crashes on presence keys colliding with Object.prototype members in Presence.syncState/syncDiff
Summary
Improper Check for Unusual or Exceptional Conditions vulnerability in phoenixframework phoenix (Presence JavaScript client) allows an attacker with ordinary channel access to cause a persistent client-side denial of service against every viewer of a presence channel topic.
This vulnerability is associated with program files assets/js/phoenix/presence.js and program routines Presence.syncState and Presence.syncDiff.
The Phoenix JavaScript presence client checks whether a presence already exists with a bare truthiness test (state[key]) instead of an own-property check. Presence keys can be attacker-controlled, because applications track presences under a username or id supplied by the client. A user who joins a channel choosing a key that is an Object.prototype member name (__proto__, constructor, toString, hasOwnProperty, and similar) makes that lookup return JavaScript's built-in Object.prototype instead of undefined. Because the prototype is truthy, the code treats it as an existing presence and reads .metas.map(...) off it, which throws an uncaught TypeError.
The exception propagates out of the presence message handler, so the local state is never updated and onSync() never fires. Because the malicious key is tracked on the server, it is re-pushed on every presence update and keeps re-throwing, so presence sync stays broken for every viewer of that channel topic until the attacker leaves. Both syncState and syncDiff use the same unsafe existence-check pattern. The impact is limited to the affected topic and is a read-time confusion of the prototype object, not a mutation of Object.prototype (it is not prototype pollution).
This issue affects phoenix: from 1.2.0-rc.0 before 1.5.15, from 1.6.0-rc.0 before 1.6.17, from 1.7.0-rc.0 before 1.7.24, and from 1.8.0-rc.0 before 1.8.9.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-07 16:11 UTC
CWE
- CWE-754 - Improper Check for Unusual or Exceptional Conditions
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| phoenixframework | phoenix |
Affected:
1.2.0-rc.0 , < 1.5.15
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|
| phoenixframework | phoenix |
Affected:
2270aaf21bd02c6a6a1022820564efb605a97655 , < *
(git)
cpe:2.3:a:phoenixframework:phoenix:*:*:*:*:*:*:*:* |
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"value": "\u003cp\u003eImproper Check for Unusual or Exceptional Conditions vulnerability in phoenixframework phoenix (Presence JavaScript client) allows an attacker with ordinary channel access to cause a persistent client-side denial of service against every viewer of a presence channel topic.\u003c/p\u003e\u003cp\u003eThis vulnerability is associated with program files \u003ctt\u003eassets/js/phoenix/presence.js\u003c/tt\u003e and program routines \u003ctt\u003ePresence.syncState\u003c/tt\u003e and \u003ctt\u003ePresence.syncDiff\u003c/tt\u003e.\u003c/p\u003e\u003cp\u003eThe Phoenix JavaScript presence client checks whether a presence already exists with a bare truthiness test (\u003ctt\u003estate[key]\u003c/tt\u003e) instead of an own-property check. Presence keys can be attacker-controlled, because applications track presences under a username or id supplied by the client. A user who joins a channel choosing a key that is an \u003ctt\u003eObject.prototype\u003c/tt\u003e member name (\u003ctt\u003e__proto__\u003c/tt\u003e, \u003ctt\u003econstructor\u003c/tt\u003e, \u003ctt\u003etoString\u003c/tt\u003e, \u003ctt\u003ehasOwnProperty\u003c/tt\u003e, and similar) makes that lookup return JavaScript\u0027s built-in \u003ctt\u003eObject.prototype\u003c/tt\u003e instead of \u003ctt\u003eundefined\u003c/tt\u003e. Because the prototype is truthy, the code treats it as an existing presence and reads \u003ctt\u003e.metas.map(...)\u003c/tt\u003e off it, which throws an uncaught \u003ctt\u003eTypeError\u003c/tt\u003e.\u003c/p\u003e\u003cp\u003eThe exception propagates out of the presence message handler, so the local state is never updated and \u003ctt\u003eonSync()\u003c/tt\u003e never fires. Because the malicious key is tracked on the server, it is re-pushed on every presence update and keeps re-throwing, so presence sync stays broken for every viewer of that channel topic until the attacker leaves. Both \u003ctt\u003esyncState\u003c/tt\u003e and \u003ctt\u003esyncDiff\u003c/tt\u003e use the same unsafe existence-check pattern. The impact is limited to the affected topic and is a read-time confusion of the prototype object, not a mutation of \u003ctt\u003eObject.prototype\u003c/tt\u003e (it is not prototype pollution).\u003c/p\u003e\u003cp\u003eThis issue affects phoenix: from 1.2.0-rc.0 before 1.5.15, from 1.6.0-rc.0 before 1.6.17, from 1.7.0-rc.0 before 1.7.24, and from 1.8.0-rc.0 before 1.8.9.\u003c/p\u003e"
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"value": "Improper Check for Unusual or Exceptional Conditions vulnerability in phoenixframework phoenix (Presence JavaScript client) allows an attacker with ordinary channel access to cause a persistent client-side denial of service against every viewer of a presence channel topic.\n\nThis vulnerability is associated with program files assets/js/phoenix/presence.js and program routines Presence.syncState and Presence.syncDiff.\n\nThe Phoenix JavaScript presence client checks whether a presence already exists with a bare truthiness test (state[key]) instead of an own-property check. Presence keys can be attacker-controlled, because applications track presences under a username or id supplied by the client. A user who joins a channel choosing a key that is an Object.prototype member name (__proto__, constructor, toString, hasOwnProperty, and similar) makes that lookup return JavaScript\u0027s built-in Object.prototype instead of undefined. Because the prototype is truthy, the code treats it as an existing presence and reads .metas.map(...) off it, which throws an uncaught TypeError.\n\nThe exception propagates out of the presence message handler, so the local state is never updated and onSync() never fires. Because the malicious key is tracked on the server, it is re-pushed on every presence update and keeps re-throwing, so presence sync stays broken for every viewer of that channel topic until the attacker leaves. Both syncState and syncDiff use the same unsafe existence-check pattern. The impact is limited to the affected topic and is a read-time confusion of the prototype object, not a mutation of Object.prototype (it is not prototype pollution).\n\nThis issue affects phoenix: from 1.2.0-rc.0 before 1.5.15, from 1.6.0-rc.0 before 1.6.17, from 1.7.0-rc.0 before 1.7.24, and from 1.8.0-rc.0 before 1.8.9."
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CVE-2026-55577 (GCVE-0-2026-55577)
Vulnerability from cvelistv5 – Published: 2026-07-01 18:56 – Updated: 2026-07-01 19:24
VLAI
EPSS
VEX
Title
ImageMagick: Heap Buffer Overflow in ImageMagick MVG decoder
Summary
ImageMagick is free and open-source software used for editing and manipulating digital images. Prior to versions 6.9.13-51 and 7.1.2-26, a heap buffer overflow occurs in the MVG decoder that could result in an out of bounds write when processing a crafted image. This issue has been fixed in versions 6.9.13-51 and 7.1.2-26.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-01 19:24 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ImageMagick/ImageMagick/securi… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ImageMagick | ImageMagick |
Affected:
>= 7.0.1-0, < 7.1.2-26
Affected: < 6.9.13-51 |
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CVE-2026-55484 (GCVE-0-2026-55484)
Vulnerability from cvelistv5 – Published: 2026-08-28 19:19 – Updated: 2026-08-28 20:00
VLAI
EPSS
VEX
Title
ALOS HTTP: Unauthenticated remote DoS: malformed path starting with "?" triggers out-of-bounds panic in sanitizeRequestPath, crashing entire server
Summary
ALOS HTTP is a Linux-first Go web framework and application server built around a custom networking stack. Prior to 0.0.0-20260617230736-314b6783e196, core/utils.go::sanitizeRequestPath calls splitPathQuery on a request path beginning with a question mark and then performs the unchecked p[0] access without checking whether the resulting path is empty. An unauthenticated client can send a malformed request such as a question-mark-only path through h1_plain.go::ParseH1RequestHead, hpack.go::decodeSimpleGetPathHTTPSRequest, hpack.go::observeHeader, or h3_conn.go::handleRequestStream, causing an out-of-bounds panic before core.Recovery() middleware runs and terminating the server process. This issue is fixed in pseudo-version 0.0.0-20260617230736-314b6783e196.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 20:00 UTC
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/guno1928/alos-http/security/ad… | x_refsource_CONFIRM |
| https://github.com/guno1928/alos-http/commit/314b… | x_refsource_MISC |
Impacted products
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Mitigation MIT-3
Requirements
Strategy: Language Selection
- Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- Choose languages with features such as exception handling that force the programmer to anticipate unusual conditions that may generate exceptions. Custom exceptions may need to be developed to handle unusual business-logic conditions. Be careful not to pass sensitive exceptions back to the user (CWE-209, CWE-248).
Mitigation
Implementation
Check the results of all functions that return a value and verify that the value is expected.
Mitigation
Implementation
If using exception handling, catch and throw specific exceptions instead of overly-general exceptions (CWE-396, CWE-397). Catch and handle exceptions as locally as possible so that exceptions do not propagate too far up the call stack (CWE-705). Avoid unchecked or uncaught exceptions where feasible (CWE-248).
Mitigation MIT-39
Implementation
- Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
- If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
- Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
- Exposing additional information to a potential attacker in the context of an exceptional condition can help the attacker determine what attack vectors are most likely to succeed beyond DoS.
Mitigation MIT-5
Implementation
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
Mitigation MIT-38
Architecture and Design
Implementation
If the program must fail, ensure that it fails gracefully (fails closed). There may be a temptation to simply let the program fail poorly in cases such as low memory conditions, but an attacker may be able to assert control before the software has fully exited. Alternately, an uncontrolled failure could cause cascading problems with other downstream components; for example, the program could send a signal to a downstream process so the process immediately knows that a problem has occurred and has a better chance of recovery.
Mitigation
Architecture and Design
Use system limits, which should help to prevent resource exhaustion. However, the product should still handle low resource conditions since they may still occur.
No CAPEC attack patterns related to this CWE.