Common Weakness Enumeration
CWE-307
AllowedImproper Restriction of Excessive Authentication Attempts
Abstraction: Base · Status: Draft
The product does not implement sufficient measures to prevent multiple failed authentication attempts within a short time frame.
1069 vulnerabilities reference this CWE, most recent first.
CVE-2026-93637 (GCVE-0-2026-93637)
Vulnerability from cvelistv5 – Published: 2026-10-14 16:25 – Updated: 2026-10-16 15:31
VLAI
EPSS
VEX
Title
Zimbra Collaboration Suite GraphQL Batched Authentication Bypasses Pre-Auth Rate Limiting
Summary
An authentication rate-limit bypass in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows unauthenticated attackers to make repeated password guesses through GraphQL without incrementing Zimbra’s source-IP failure counter. GraphQL aliases allow multiple authentication attempts in one HTTP request.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:18 UTC
CWE
- CWE-307 - Improper restriction of excessive authentication attempts
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.rapid7.com/blog/post/ve-breaking-zimb… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite |
Affected:
0 , ≤ 10.1.21
(semver)
|
Date Public
2026-10-14 16:19
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CVE-2026-93346 (GCVE-0-2026-93346)
Vulnerability from cvelistv5 – Published: 2026-10-13 13:27 – Updated: 2026-10-16 21:54
VLAI
EPSS
VEX
Title
Wazuh 4.0.0 before 4.14.8 API Brute-Force Protection Bypass via Race Condition
Summary
Wazuh from 4.0.0 before 4.14.8 contains a race condition in API login throttling that allows unauthenticated attackers to bypass max_login_attempts by sending concurrent requests. Attackers can fire concurrent login bursts to the authenticate and run_as endpoints, each passing the block check before failures are counted, enabling unlimited password guessing.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 21:54 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/wazuh/wazuh/security/advisorie… | vendor-advisory |
| https://github.com/wazuh/wazuh/releases/tag/v4.14.8 | patchrelease-notes |
| https://www.vulncheck.com/advisories/wazuh-4.0.0-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Wazuh | wazuh-manager |
Affected:
4.0.0 , < 4.14.8
(semver)
Unaffected: 4.14.8 (semver) cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:* |
Date Public
2026-10-13 00:00
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CVE-2026-92583 (GCVE-0-2026-92583)
Vulnerability from cvelistv5 – Published: 2026-09-16 21:46 – Updated: 2026-09-17 14:49
VLAI
EPSS
VEX
Title
AVideo through 29.0 Rate Limit Bypass via Non-Atomic Counter Increment
Summary
AVideo through 29.0 contains a race condition in the enforceRateLimit() function that fails to atomically increment rate limit counters, allowing attackers to bypass all rate limits including login brute-force protection by issuing concurrent requests. Attackers can submit parallel credential attempts to exceed the documented 30-attempts-per-5-minutes login limit by an arbitrary factor determined only by their connection concurrency.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 14:47 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/WWBN/AVideo/security/advisorie… | vendor-advisory |
| https://www.vulncheck.com/advisories/avideo-throu… | third-party-advisory |
Impacted products
Date Public
2026-09-01 00:00
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CVE-2026-92082 (GCVE-0-2026-92082)
Vulnerability from cvelistv5 – Published: 2026-09-15 14:04 – Updated: 2026-09-15 14:58 X_Open Source
VLAI
EPSS
VEX
Title
Payara Server is vulnerable to brute-force login attacks due to the absence of a limit on failed login attempts
Summary
By default, Payara Server does not limit the number of failed login attempts, which can leave it vulnerable to brute force login attacks. To mitigate this, Payara Server includes built-in automatic attack protection. For configuration details, see https://docs.azul.com/payara/technical-documentation/payara-server-documentation/security-guide/administering-system-security.html .
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 14:58 UTC
CWE
- CWE-307 - Improper restriction of excessive authentication attempts
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://docs.azul.com/payara/release-notes/releas… | release-notes |
| https://docs.azul.com/payara/version/6/release-no… | release-notes |
| https://docs.azul.com/payara/version/5/release-no… | release-notes |
| https://docs.azul.com/payara/version/4/release-no… | release-notes |
| https://docs.azul.com/payara-community/release-no… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Payara | Payara Server |
Affected:
7.0.0 , < 7.2.0
(semver)
Affected: 7.2025.1 , < 7.2026.7 (custom) Affected: 6.0.0 , < 6.40.0 (semver) Affected: 5.20.0 , < 5.89.0 (semver) Affected: 4.1.144 , < 4.1.2.191.57 (custom) Affected: 6.2023.1 (custom) Affected: 5.2020.1 (custom) |
Date Public
2026-09-15 13:09
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CVE-2026-91973 (GCVE-0-2026-91973)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-15 15:55
VLAI
EPSS
VEX
Title
Vikunja before 2.6.0 Authentication Bypass via CalDAV BasicAuth
Summary
Vikunja before 2.6.0 contains an authentication bypass vulnerability in CalDAV BasicAuth endpoints that lack rate limiting protection. Remote unauthenticated attackers can issue unbounded credential-guessing requests against /dav, /.well-known, and /feeds routes to bypass the instance's anti-brute-force controls and compromise password-only accounts.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-15 15:53 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/vikunja-befo… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
0 , < 2.6.0
(semver)
Unaffected: 2.6.0 (semver) cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* |
Date Public
2026-08-31 00:00
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CVE-2026-91972 (GCVE-0-2026-91972)
Vulnerability from cvelistv5 – Published: 2026-09-15 15:18 – Updated: 2026-09-17 15:12
VLAI
EPSS
VEX
Title
Vikunja before 2.6.0 Authentication Bypass via Unthrottled API
Summary
Vikunja versions before 2.6.0 fail to apply rate limiting to /api/v2 public authentication endpoints including login, register, password-reset, and OAuth token routes. Remote unauthenticated attackers can perform unbounded credential guessing, account enumeration, and password-reset flooding attacks without throttling restrictions.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 15:11 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/go-vikunja/vikunja/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/vikunja-befo… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| go-vikunja | vikunja |
Affected:
0 , < 2.6.0
(semver)
Unaffected: 2.6.0 (semver) cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:* |
Date Public
2026-08-31 00:00
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CVE-2026-89174 (GCVE-0-2026-89174)
Vulnerability from cvelistv5 – Published: 2026-09-11 07:31 – Updated: 2026-09-11 15:49
VLAI
EPSS
VEX
Title
Kingdom Communication Associated｜Smart Video Intercom System - Missing Burte-force Protection
Summary
Smart Video Intercom System developed by Kingdom Communication Associated has a Missing Brute-force Protection vulnerability. Unauthenticated remote attackers can gain access to valid accounts through a large number of login attempts.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-11 15:47 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.twcert.org.tw/tw/cp-132-11198-b8bba-1.html | third-party-advisory |
| https://www.twcert.org.tw/en/cp-139-11199-38e1e-2.html | third-party-advisory |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Kingdom Communication Associated | EH3040 |
Affected:
0 , < 2.5.0A
(custom)
|
|
| Kingdom Communication Associated | EH4200 |
Affected:
0 , < 2.5.0A
(custom)
|
|
| Kingdom Communication Associated | EH1000B |
Affected:
0 , < 2.7.0A
(custom)
|
|
| Kingdom Communication Associated | EH2070 |
Affected:
0 , < 2.8.0A
(custom)
|
Date Public
2026-09-11 07:28
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CVE-2026-88770 (GCVE-0-2026-88770)
Vulnerability from cvelistv5 – Published: 2026-09-10 07:18 – Updated: 2026-09-10 10:49
VLAI
EPSS
VEX
Title
Keycloak-services: keycloak-services: device authorization grant issues tokens to brute-force-locked accounts
Summary
A flaw was found in the Device Authorization Grant flow of Keycloak, an identity and access management solution. The issue occurs because the token redemption process fails to check if a user account is currently locked due to brute-force protection. If an attacker has an active session for a locked account, they can complete the device login process and receive new security tokens. This allows the attacker to maintain access to the account even when it should be temporarily disabled to prevent unauthorized entry.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 10:49 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-88770 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2531302 | issue-trackingx_refsource_REDHAT |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Build of Keycloak |
cpe:/a:redhat:build_keycloak:
|
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
Date Public
2026-09-09 17:32
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CVE-2026-86729 (GCVE-0-2026-86729)
Vulnerability from cvelistv5 – Published: 2026-09-08 15:14 – Updated: 2026-09-10 15:02
VLAI
EPSS
VEX
Title
WWBN AVideo Unrestricted Authentication Attempts via get_api_preauthorize
Summary
WWBN AVideo through commit e01e41ecc (no patched version available) exposes get_api_preauthorize in plugin/API/API.php as a second, undocumented login path. Unlike get_api_signIn, which enforces a rate limit of 10 attempts per 5 minutes via checkRateLimit(), get_api_preauthorize performs the same credential check with no throttling for any client, allowing unlimited remote password guessing against arbitrary accounts, including admin. The endpoint also acts as a credential oracle: it returns the message "Invalid credentials" for both correct and incorrect passwords, while the users_id field in the response body discloses the authenticated identity (users_id:1 on success, users_id:0 on failure), and a correct password establishes a session cookie that remains usable for authenticated API requests. Together these issues permit unauthenticated brute-force account takeover.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 14:18 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/WWBN/AVideo/security/advisorie… | vendor-advisory |
| https://www.vulncheck.com/advisories/wwbn-avideo-… | third-party-advisory |
Impacted products
Date Public
2026-08-24 00:00
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CVE-2026-86186 (GCVE-0-2026-86186)
Vulnerability from cvelistv5 – Published: 2026-09-05 12:09 – Updated: 2026-09-08 17:20
VLAI
EPSS
VEX
Title
AVideo API Rate Limit Bypass via Bot User-Agent Header
Summary
AVideo API fails to enforce rate limits when clients send a bot User-Agent header, allowing attackers to bypass all eight protected operations including login brute-force protection. Attackers can send requests with a bot User-Agent to disable rate limiting and perform unlimited password guessing attempts against any account from a single IP address.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 17:19 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/WWBN/AVideo/security/advisorie… | vendor-advisory |
| https://www.vulncheck.com/advisories/avideo-api-r… | third-party-advisory |
Impacted products
Date Public
2026-08-21 00:00
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Mitigation
Architecture and Design
- Common protection mechanisms include:
- Disconnecting the user after a small number of failed attempts
- Implementing a timeout
- Locking out a targeted account
- Requiring a computational task on the user's part.
Mitigation MIT-4
Architecture and Design
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
- Consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator. [REF-45]
CAPEC-16: Dictionary-based Password Attack
An attacker tries each of the words in a dictionary as passwords to gain access to the system via some user's account. If the password chosen by the user was a word within the dictionary, this attack will be successful (in the absence of other mitigations). This is a specific instance of the password brute forcing attack pattern.
Dictionary Attacks differ from similar attacks such as Password Spraying (CAPEC-565) and Credential Stuffing (CAPEC-600), since they leverage unknown username/password combinations and don't care about inducing account lockouts.
CAPEC-49: Password Brute Forcing
An adversary tries every possible value for a password until they succeed. A brute force attack, if feasible computationally, will always be successful because it will essentially go through all possible passwords given the alphabet used (lower case letters, upper case letters, numbers, symbols, etc.) and the maximum length of the password.
CAPEC-560: Use of Known Domain Credentials
An adversary guesses or obtains (i.e. steals or purchases) legitimate credentials (e.g. userID/password) to achieve authentication and to perform authorized actions under the guise of an authenticated user or service.
CAPEC-565: Password Spraying
In a Password Spraying attack, an adversary tries a small list (e.g. 3-5) of common or expected passwords, often matching the target's complexity policy, against a known list of user accounts to gain valid credentials. The adversary tries a particular password for each user account, before moving onto the next password in the list. This approach assists the adversary in remaining undetected by avoiding rapid or frequent account lockouts. The adversary may then reattempt the process with additional passwords, once enough time has passed to prevent inducing a lockout.
CAPEC-600: Credential Stuffing
An adversary tries known username/password combinations against different systems, applications, or services to gain additional authenticated access. Credential Stuffing attacks rely upon the fact that many users leverage the same username/password combination for multiple systems, applications, and services.
CAPEC-652: Use of Known Kerberos Credentials
An adversary obtains (i.e. steals or purchases) legitimate Kerberos credentials (e.g. Kerberos service account userID/password or Kerberos Tickets) with the goal of achieving authenticated access to additional systems, applications, or services within the domain.
CAPEC-653: Use of Known Operating System Credentials
An adversary guesses or obtains (i.e. steals or purchases) legitimate operating system credentials (e.g. userID/password) to achieve authentication and to perform authorized actions on the system, under the guise of an authenticated user or service. This applies to any Operating System.