Common Weakness Enumeration

CWE-440

Allowed

Expected Behavior Violation

Abstraction: Base · Status: Draft

A feature, API, or function does not perform according to its specification.

89 vulnerabilities reference this CWE, most recent first.

CVE-2026-97687 (GCVE-0-2026-97687)

Vulnerability from cvelistv5 – Published: 2026-09-29 15:30 – Updated: 2026-09-30 20:11
VLAI
Title
urllib3: HTTPS proxy TLS configuration may be ignored or overridden
Summary
urllib3 is an HTTP client library for Python. From 1.26.0 until 2.8.0, the proxy_ssl_context, proxy_assert_hostname, proxy_assert_fingerprint, ssl_context, cert_reqs, verify_mode, use_forwarding_for_https=True, and CERT_NONE configuration paths fail to remain separated because target-server TLS settings are incorrectly applied to the HTTPS proxy connection. The trigger is that an application uses an HTTPS proxy and configures target-server TLS settings that must remain separate from the proxy TLS handshake, including HTTPS forwarding with target-specific identity or credentials. Applying cert_reqs=CERT_NONE can overwrite proxy_ssl_context.verify_mode in place, and the mutation persists so later connections reusing the same context may connect to the HTTPS proxy without certificate verification. The attack mechanism is that an attacker intercepts and impersonates the HTTPS proxy after the effective proxy policy accepts the attacker's certificate. The impact is that the attacker can observe or modify forwarded traffic or receive a target TLS client certificate, while CONNECT tunneling still preserves the separate end-to-end target TLS connection. This issue is fixed in version 2.8.0.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:48 UTC
CWE
  • CWE-295 - Improper Certificate Validation
  • CWE-440 - Expected Behavior Violation
Impacted products
Vendor Product Version
urllib3 urllib3 Affected: >= 1.26.0, < 2.8.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-65934 (GCVE-0-2026-65934)

Vulnerability from cvelistv5 – Published: 2026-08-13 14:23 – Updated: 2026-08-13 16:13
VLAI
Title
BT122 plaintext pause encryption request causes DOS
Summary
An unencrypted 'pause encryption request' message causes a denial of service in the BT122 module.  See vulnerability B-E10 in the related paper below.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 16:13 UTC
CWE
  • CWE-440 - Expected behavior violation
References
URL Tags
https://community.silabs.com/068Vm00000x0Yqy vendor-advisorypermissions-required
https://arxiv.org/pdf/2409.02905 related
Impacted products
Vendor Product Version
silabs.com BT122 Affected: 0 , ≤ 1.4.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-65932 (GCVE-0-2026-65932)

Vulnerability from cvelistv5 – Published: 2026-08-13 14:20 – Updated: 2026-08-13 17:08
VLAI
Title
BT122 stops advertising
Summary
The BT122 module stops advertising after receiving a plaintext 'pause enceryption response' message resulting in a denial of service. See vulnerability B-E2 in the related paper below.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 17:07 UTC
CWE
  • CWE-440 - Expected behavior violation
References
URL Tags
https://community.silabs.com/068Vm00000x0Yqy vendor-advisorypermissions-required
https://arxiv.org/pdf/2409.02905 related
Impacted products
Vendor Product Version
silabs.com BT122 Affected: 0 , ≤ 1.4.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-49316 (GCVE-0-2026-49316)

Vulnerability from cvelistv5 – Published: 2026-05-29 12:39 – Updated: 2026-06-27 08:47
VLAI
Title
Indian Scout Bobber 2025 WCM CAN bus-off attack silently bypasses anti-theft shutdown
Summary
Expected behavior violation in the in-vehicle network of the Indian Motorcycle Scout Bobber + Tech 2025 model year allows an adjacent-network attacker to bypass the motorcycle's anti-theft shutdown by forcing the Wireless Control Module (WCM) into the CAN bus-off state. Using a well-known CAN error-frame injection technique against a periodic WCM transmission, the attacker drives the WCM CAN controller's transmit error counter past the bus-off threshold, after which the WCM stops transmitting all messages, including the shutdown command. Peer ECUs do not interpret WCM silence as a security event and continue normal operation, allowing the motorcycle to be operated despite the immobilizer never having been unlocked. Specific protocol details have been withheld pending vendor remediation.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-29 15:26 UTC
CWE
  • CWE-440 - Expected Behavior Violation
  • CWE-754 - Improper Check for Unusual or Exceptional Conditions
  • CWE-693 - Protection Mechanism Failure
References
URL Tags
https://cwe.mitre.org/data/definitions/440.html technical-description
Impacted products
Vendor Product Version
Indian Motorcycle Scout Bobber + Tech Affected: 2025 (model-year)
Create a notification for this product.
Date Public
2026-05-29 15:00
Show details on NVD website

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CVE-2026-42752 (GCVE-0-2026-42752)

Vulnerability from cvelistv5 – Published: 2026-06-15 20:18 – Updated: 2026-06-16 01:23
VLAI
Title
WordPress Stripe Payments plugin <= 2.0.98 - Bypass Vulnerability vulnerability
Summary
Unauthenticated Bypass Vulnerability in Stripe Payments <= 2.0.98 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 01:09 UTC
CWE
  • CWE-440 - Expected Behavior Violation
References
Impacted products
Vendor Product Version
mra13 / Team Tips and Tricks HQ Stripe Payments Affected: n/a , ≤ 2.0.98 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-42534 (GCVE-0-2026-42534)

Vulnerability from cvelistv5 – Published: 2026-05-20 09:19 – Updated: 2026-09-01 12:04
VLAI
Title
Jostle logic bypass degrades resolution performance
Summary
NLnet Labs Unbound up to and including version 1.25.0 has a vulnerability in the jostle logic that could defeat its purpose and degrade resolution performance. Retransmits of the same query could renew the age of slow running queries and not allow the jostle logic to see them as aged and potential targets for replacement with new queries. An adversary who can query a vulnerable Unbound and who can control a domain name server that replies slowly and/or maliciously to Unbound's queries can exploit the vulnerability and degrade the resolution performance of Unbound. When Unbound's 'num-queries-per-thread' reaches its limit, the jostle logic kicks in. When a new query comes in, half of the available queries that are also slow to resolve are candidates for replacement. The vulnerability then happens because duplicate queries that need resolution would skew the aging result by using the timestamp of the latest duplicate query instead of the original one that started the resolution effort. Cache and local data response performance remains unaffected. Coordinated attacks could raise this to a denial of resolution service. Unbound 1.25.1 contains a patch with a fix to attach an initial, non-updatable start time for incoming queries that allow the jostle logic to work as intended.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-20 12:10 UTC
CWE
  • CWE-440 - Expected Behavior Violation
  • CWE-911 - Improper Update of Reference Count
References
Impacted products
Vendor Product Version
NLnet Labs Unbound Affected: 0 , < 1.25.1 (semver)
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:1.24.2-7.el10_2.2 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.16.2-5.12.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.24.2-3.el9_8.2 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
Create a notification for this product.
Red Hat Red Hat Hardened Images Unaffected: 1.25.1-2.hum1 , < * (rpm)
    cpe:/a:redhat:hummingbird:1
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
Create a notification for this product.
Date Public
2026-05-20 00:00
Show details on NVD website

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CVE-2026-41136 (GCVE-0-2026-41136)

Vulnerability from cvelistv5 – Published: 2026-04-21 23:54 – Updated: 2026-04-22 13:11
VLAI
Title
free5GC AMF missing default case in Content-Type switch in HTTPUEContextTransfer
Summary
free5GC AMF provides Access & Mobility Management Function (AMF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Prior to version 1.4.3, the `HTTPUEContextTransfer` handler in `internal/sbi/api_communication.go` does not include a `default` case in the `Content-Type` switch statement. When a request arrives with an unsupported `Content-Type`, the deserialization step is silently skipped, `err` remains `nil`, and the processor is invoked with a completely uninitialized `UeContextTransferRequest` object. Version 1.4.3 contains a fix.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 13:11 UTC
CWE
  • CWE-440 - Expected Behavior Violation
References
Impacted products
Vendor Product Version
free5gc amf Affected: < 1.4.3
Create a notification for this product.
Show details on NVD website

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CVE-2026-35191 (GCVE-0-2026-35191)

Vulnerability from cvelistv5 – Published: 2026-09-29 15:32 – Updated: 2026-09-30 20:11
VLAI
Title
QUIC Unvalidated Amplification Credit may be Over Accounted
Summary
Issue summary: The OpenSSL QUIC server, when configured to not preform address validation, can be forced to count incoming packets multiple times in its unvalidated credit computation, leading to a violation of the RFC 9000 unvalidated connection amplification limit of 3 times the amount of data received. Impact summary: A remote attacker able to spoof packets to a server using the OpenSSL QUIC implementation might use the server for an amplification of a DDoS attack. CWE: CWE-440: Expected Behavior Violation Description: OpenSSL's QUIC stack, when operating as a server, enforces client address validation (RFC 9000, Section 8), to confirm the peer address is not used for a traffic amplification attack. If this feature is disabled on the server, the QUIC stack limits the amount of server data that can be sent to 3 times the amount of data received from the peer address, until such time as the TLS handshake is completed. The OpenSSL QUIC server, when operating in non-validation mode, adds the length of the whole datagram received to the unvalidated credit limit when processing each QUIC packet in the datagram. A remote peer may, after establishing a connection with an initial client hello frame, send a subsequent datagram containing multiple QUIC packets, leading the server to account the entire datagram length for each packet in the datagram, resulting in the server believing that the peer has sent more data than it actually has, thereby violating the 3x amplification limit mandated by the RFC. FIPS impact: no As the QUIC stack lives outside the FIPS module boundary, no FIPS modules are affected by this CVE.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:35 UTC
CWE
  • CWE-440 - Expected Behavior Violation
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: 4.0.0 , < 4.0.3 (semver)
Affected: 3.6.0 , < 3.6.5 (semver)
Affected: 3.5.0 , < 3.5.9 (semver)
Create a notification for this product.
Date Public
2026-09-29 14:21
Show details on NVD website

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CVE-2026-35040 (GCVE-0-2026-35040)

Vulnerability from cvelistv5 – Published: 2026-04-09 14:52 – Updated: 2026-04-13 20:03
VLAI
Title
fast-jwt: Stateful RegExp (/g or /y) causes non-deterministic allowed-claim validation (logical DoS)
Summary
fast-jwt provides fast JSON Web Token (JWT) implementation. Prior to 6.2.1, using certain modifiers on RegExp objects in the allowedAud, allowedIss, allowedSub, allowedJti, or allowedNonce options in verify functions can cause certain unintended behaviours. This is because some modifiers are stateful and will cause failures in every second verification attempt regardless of the validity of the token provided. Such modifiers are /g (global matching) and /y (sticky matching). This does NOT allow invalid tokens to be accepted, only for valid tokens to be improperly rejected in some configurations. Instead it causes 50% of valid authentication requests to fail in an alternating pattern. This vulnerability is fixed in 6.2.1.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 20:03 UTC
CWE
  • CWE-697 - Incorrect Comparison
  • CWE-440 - Expected Behavior Violation
Impacted products
Vendor Product Version
nearform fast-jwt Affected: < 6.2.1
Create a notification for this product.
Show details on NVD website

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CVE-2026-16769 (GCVE-0-2026-16769)

Vulnerability from cvelistv5 – Published: 2026-09-08 15:54 – Updated: 2026-09-08 18:09
VLAI
Title
RS9116W/SiWx917 plaintext pause encryption request causes DOS
Summary
An unencrypted 'pause encryption request' message causes a denial of service in the in the RS9116W/SiWx917. See vulnerability B-E10 in the related paper below.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:08 UTC
CWE
  • CWE-440 - Expected behavior violation
References
URL Tags
https://community.silabs.com/068Vm00000x0Yqy vendor-advisorypermissions-required
https://arxiv.org/pdf/2409.02905 related
Impacted products
Vendor Product Version
silabs.com WiseCnnect Affected: 2.0.0 , ≤ 2.*.* (semver)
Create a notification for this product.
Show details on NVD website

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No mitigation information available for this CWE.

No CAPEC attack patterns related to this CWE.