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.
958 vulnerabilities reference this CWE, most recent first.
CVE-2026-78551 (GCVE-0-2026-78551)
Vulnerability from cvelistv5 – Published: 2026-08-24 19:20 – Updated: 2026-08-24 20:07
VLAI
EPSS
VEX
Title
RansomLook Login Endpoint Allows Timing-Based Username Enumeration and Unthrottled Authentication Attempts
Summary
RansomLook contains multiple weaknesses in its authentication endpoint that allow an unauthenticated remote attacker to enumerate valid usernames, perform unrestricted password-guessing attacks, and potentially exhaust application worker resources.
For local authentication, the login implementation previously checked whether a submitted username existed before invoking the password hash verification function. Requests containing a nonexistent username therefore returned significantly faster than requests for valid accounts, for which the computationally expensive password verification routine was executed. A remote attacker could measure these response-time differences to determine which usernames correspond to valid RansomLook accounts.
In addition, the /login endpoint did not restrict the number or frequency of failed authentication attempts. An attacker could consequently perform password brute-force, dictionary, password-spraying, or credential-stuffing attacks against known accounts without server-side throttling. For valid usernames, each authentication attempt also invokes the password key-derivation function, which consumes a significant amount of CPU time. A sufficiently high rate of login attempts could therefore occupy the application's synchronous Gunicorn workers and cause a denial of service affecting the entire application.
The issue has been addressed by always performing password verification using a randomly generated dummy password hash when the supplied username does not exist, eliminating the username-dependent timing discrepancy. Failed authentication attempts are additionally rate-limited per client IP address using Valkey/Redis, with five failed attempts within five minutes resulting in a one-hour block. The reverse-proxy configuration was also updated so that the application derives the client address from a trusted X-Forwarded-For value that cannot be overridden by a client-supplied header.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 20:07 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/RansomLook/RansomLook/commit/8… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ransomlook | ransomlook |
Affected:
0 , ≤ 2.0.0
(semver)
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CVE-2026-76213 (GCVE-0-2026-76213)
Vulnerability from cvelistv5 – Published: 2026-08-19 14:01 – Updated: 2026-08-19 15:07
VLAI
EPSS
VEX
Title
phpMyFAQ before 4.1.7 2FA Brute-Force via Session-Scoped Throttle
Summary
phpMyFAQ before 4.1.7 contains a brute-force vulnerability in the two-factor authentication step where the failure counter is session-scoped and reset on each successful password re-authentication. Attackers with a valid password can bypass the five-attempt limit by obtaining a fresh session cookie and repeatedly re-authenticating to reset the counter, enabling unbounded TOTP code guessing.
Severity
7.4 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 15:05 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/thorsten/phpMyFAQ/security/adv… | vendor-advisory |
| https://www.vulncheck.com/advisories/phpmyfaq-bef… | third-party-advisory |
Impacted products
Date Public
2026-08-04 00:00
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CVE-2026-75773 (GCVE-0-2026-75773)
Vulnerability from cvelistv5 – Published: 2026-08-18 11:00 – Updated: 2026-08-19 13:40 X_Open Source
VLAI
EPSS
VEX
Title
karakeep-app karakeep Login Endpoint auth.ts authorize excessive authentication
Summary
A vulnerability was found in karakeep-app karakeep up to 0.32.0. The affected element is the function authorize of the file apps/web/server/auth.ts of the component Login Endpoint. The manipulation results in improper restriction of excessive authentication attempts. The attack may be performed from remote. This attack is characterized by high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. Upgrading to version 0.33.0 is sufficient to fix this issue. The patch is identified as f7d042971d0d2bcc7119654830cf1eb93eabbf24. It is advisable to upgrade the affected component.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:39 UTC
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/391519 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/391519/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-75773 | third-party-advisory |
| https://vuldb.com/submit/877731 | third-party-advisory |
| https://github.com/karakeep-app/karakeep/issues/2919 | exploitissue-tracking |
| https://github.com/karakeep-app/karakeep/commit/f… | patch |
| https://github.com/karakeep-app/karakeep/releases… | patch |
| https://github.com/karakeep-app/karakeep/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| karakeep-app | karakeep |
Affected:
0.1
Affected: 0.2 Affected: 0.3 Affected: 0.4 Affected: 0.5 Affected: 0.6 Affected: 0.7 Affected: 0.8 Affected: 0.9 Affected: 0.10 Affected: 0.11 Affected: 0.12 Affected: 0.13 Affected: 0.14 Affected: 0.15 Affected: 0.16 Affected: 0.17 Affected: 0.18 Affected: 0.19 Affected: 0.20 Affected: 0.21 Affected: 0.22 Affected: 0.23 Affected: 0.24 Affected: 0.25 Affected: 0.26 Affected: 0.27 Affected: 0.28 Affected: 0.29 Affected: 0.30 Affected: 0.31 Affected: 0.32.0 Unaffected: 0.33.0 cpe:2.3:a:karakeep-app:karakeep:*:*:*:*:*:*:*:* |
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CVE-2026-75575 (GCVE-0-2026-75575)
Vulnerability from cvelistv5 – Published: 2026-08-25 01:30 – Updated: 2026-08-25 01:30
VLAI
EPSS
VEX
Title
Rocket.Chat Missing DDP Rate Limit on the sendForgotPasswordEmail Meteor Method
Summary
Rocket.Chat exposes the sendForgotPasswordEmail Meteor method without a DDP rate limit, so an unauthenticated caller may invoke it as often as it likes. The method is reachable over DDP and over the HTTP route POST /api/v1/method.callAnon/sendForgotPasswordEmail, and it triggers a password reset message for any address that matches an account. With no DDPRateLimiter rule registered for it, a caller can drive an unbounded volume of reset mail at a chosen address from the deployment's own mail sender, and can probe addresses at scale: the method answers true for an address with no account and for a successful send, but false when the address belongs to an account that authenticates through an external provider and Accounts_AllowPasswordChangeForOAuthUsers is off, so repeated calls distinguish that class of account. Later versions register a rule permitting ten calls per minute per client address.
Severity
5.3 (Medium)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/RocketChat/Rocket.Chat/securit… | vendor-advisory |
| https://github.com/RocketChat/Rocket.Chat | product |
| https://github.com/RocketChat/Rocket.Chat/commit/… | patch |
| https://www.vulncheck.com/advisories/rocket-chat-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| RocketChat | Rocket.Chat |
Affected:
0 , < 7.10.15
(semver)
Affected: 8.0.0 , < 8.1.8 (semver) Affected: 8.2.0 , < 8.2.8 (semver) Affected: 8.3.0 , < 8.3.8 (semver) Affected: 8.4.0 , < 8.4.6 (semver) Affected: 8.5.0 , < 8.5.3 (semver) Affected: 8.6.0 , < 8.6.2 (semver) Affected: 8.7.0 , < 8.7.2 (semver) Affected: 8.8.0-rc.0 , < 8.8.0 (semver) cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* cpe:2.3:a:rocket.chat:rocket.chat:*:*:*:*:*:*:*:* |
Date Public
2026-08-20 00:00
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CVE-2026-74868 (GCVE-0-2026-74868)
Vulnerability from cvelistv5 – Published: 2026-08-17 11:04 – Updated: 2026-08-17 14:38
VLAI
EPSS
VEX
Title
SiYuan before 3.7.4 Brute-Force Authentication via Publish Service
Summary
SiYuan versions before 3.7.4 contain an unthrottled brute-force vulnerability in the Publish Service Basic Auth implementation (PublishServiceTransport.RoundTrip() in kernel/server/proxy/publish.go). The Publish Service runs on a separate, unauthenticated-by-default listener (default TCP port 6808) and gates named publish-viewer accounts (Conf.Publish.Auth.Accounts) with Basic Auth that has no rate limiting, per-account lockout, or backoff. Unauthenticated remote attackers can submit unlimited password guesses against named accounts to gain access to published notes/notebooks.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 14:37 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-befor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.7.4
(semver)
Unaffected: 3.7.4 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-08-03 00:00
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CVE-2026-73529 (GCVE-0-2026-73529)
Vulnerability from cvelistv5 – Published: 2026-08-18 19:10 – Updated: 2026-08-18 19:30 X_Open Source
VLAI
EPSS
VEX
Title
Plainpad Missing Rate Limiting via POST /v1/sessions
Summary
Plainpad through 1.1.1, fixed in commit d3823fc, contains a missing rate limiting vulnerability that allows unauthenticated attackers to send unbounded login requests to the POST /v1/sessions endpoint due to dead code in App\Http\Kernel.php that is never instantiated under the Laravel 11+ skeleton, leaving the API throttle configuration unattached to any route. Attackers can exploit this by sending unlimited credential attempts with no lockout or CAPTCHA enforcement, and additionally trigger CPU exhaustion by forcing repeated bcrypt comparisons on each request.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:30 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/alextselegidis/plainpad/commit… | patch |
| https://www.vulncheck.com/advisories/plainpad-mis… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| alextselegidis | plainpad |
Affected:
0 , ≤ 1.1.1
(semver)
Unaffected: d3823fc595b5d8f842a6fd7dfe49b7852a10fdac (git) |
Date Public
2026-08-18 00:00
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CVE-2026-73056 (GCVE-0-2026-73056)
Vulnerability from cvelistv5 – Published: 2026-08-16 13:14 – Updated: 2026-08-17 18:33
VLAI
EPSS
VEX
Title
SiYuan kernel before 3.7.4 Unthrottled Brute-Force via API Token
Summary
SiYuan kernel versions before 3.7.4 contain an improper restriction of excessive authentication attempts vulnerability in the CheckAuth() middleware. The middleware accepts the API token (Conf.Api.Token) via an Authorization header (Token/Bearer) or a ?token= query parameter, and neither path is protected by the application's CAPTCHA/lockout mechanism (NeedCaptcha/WrongAuthCount). As a result, an unauthenticated remote attacker can perform unlimited automated guesses of the API token, particularly when a short or weak custom token has been configured, and upon success gains full RoleAdministrator access enabling arbitrary file operations and SQL queries.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 18:33 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-kerne… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.7.4
(semver)
Unaffected: 3.7.4 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-08-02 00:00
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CVE-2026-73046 (GCVE-0-2026-73046)
Vulnerability from cvelistv5 – Published: 2026-08-15 21:44 – Updated: 2026-08-17 17:33
VLAI
EPSS
VEX
Title
SiYuan before v3.7.4 Authentication Bypass via HTTP Basic Auth
Summary
SiYuan before v3.7.4 improperly restricts excessive authentication attempts in the CheckAuth() middleware. The HTTP Basic Authentication branch, which guards nearly the entire /api/* surface, accepts the workspace access code (Conf.AccessAuthCode) as the Basic Auth password but never consults the CAPTCHA/lockout gate or increments the failure counter used by the cookie/session login path. This allows unauthenticated remote attackers to brute-force the admin access code with unlimited automated requests and obtain full RoleAdministrator access to the kernel. A secondary weakness exists because the access code is compared using a non-constant-time string comparison.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 17:32 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-befor… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.7.4
(semver)
Unaffected: 3.7.4 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-08-01 00:00
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CVE-2026-73045 (GCVE-0-2026-73045)
Vulnerability from cvelistv5 – Published: 2026-08-15 21:44 – Updated: 2026-08-18 02:21
VLAI
EPSS
VEX
Title
SiYuan before 3.7.4 Brute-Force via authFilePublishAccess
Summary
SiYuan before 3.7.4 contains an improper restriction of excessive authentication attempts vulnerability in the authFilePublishAccess endpoint that allows unauthenticated attackers to brute-force per-notebook publish passwords. Attackers can submit unbounded password guesses without rate limiting or CAPTCHA to gain access to password-protected published notebooks.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 02:20 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-befor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.7.4
(semver)
Unaffected: 3.7.4 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-08-01 00:00
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CVE-2026-71213 (GCVE-0-2026-71213)
Vulnerability from cvelistv5 – Published: 2026-08-05 06:59 – Updated: 2026-08-10 11:45
VLAI
EPSS
VEX
Title
typemill - No Rate Limiting on Login Endpoint Enables Unlimited Password Brute-Force
Summary
Typemill's login endpoint (POST /tm/login, ControllerWebAuth::login) performs no rate-limiting, failed-attempt counting, or account lockout when captcha is disabled, which is the default configuration. An unauthenticated attacker can send unlimited password-guessing requests against any account, including administrators, with no throttling.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 13:27 UTC
CWE
- CWE-307 - Improper Restriction of Excessive Authentication Attempts
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/typemill/typemill | third-party-advisory |
Impacted products
Date Public
2026-08-05 06:59
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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.