Common Weakness Enumeration
CWE-203
AllowedObservable Discrepancy
Abstraction: Base · Status: Incomplete
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
834 vulnerabilities reference this CWE, most recent first.
CVE-2026-58503 (GCVE-0-2026-58503)
Vulnerability from cvelistv5 – Published: 2026-07-10 21:12 – Updated: 2026-07-13 18:55
VLAI
EPSS
VEX
Title
Frappe: Unauthenticated User Enumeration via reset_password
Summary
Frappe is a full-stack web application framework. Prior to 16.16.0 and 15.106.0, user enumeration could be performed via the reset_password endpoint. This issue is fixed in versions 16.16.0 and 15.106.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/frappe/frappe/security/advisor… | x_refsource_CONFIRM |
| https://github.com/frappe/frappe/pull/38625 | x_refsource_MISC |
| https://github.com/frappe/frappe/pull/38626 | x_refsource_MISC |
| https://github.com/frappe/frappe/commit/1ff64d4a6… | x_refsource_MISC |
| https://github.com/frappe/frappe/commit/d3becf567… | x_refsource_MISC |
| https://github.com/frappe/frappe/releases/tag/v15.106.0 | x_refsource_MISC |
| https://github.com/frappe/frappe/releases/tag/v16.16.0 | x_refsource_MISC |
Impacted products
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CVE-2026-56327 (GCVE-0-2026-56327)
Vulnerability from cvelistv5 – Published: 2026-06-30 22:08 – Updated: 2026-07-01 13:19
VLAI
EPSS
VEX
Title
Capgo - Unauthenticated Organization Existence Oracle via public.invite_user_to_org RPC
Summary
Capgo before 12.128.2 contains an information disclosure vulnerability in the public.invite_user_to_org RPC function that allows unauthenticated attackers to enumerate organization existence by observing distinct error responses. Attackers can call the SECURITY DEFINER function with a publishable API key to determine if an organization ID exists based on NO_ORG versus NO_RIGHTS responses, enabling tenant enumeration attacks.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Cap-go/capgo/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/capgo-unauth… | third-party-advisory |
Impacted products
Date Public
2026-03-17 00:00
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CVE-2026-56319 (GCVE-0-2026-56319)
Vulnerability from cvelistv5 – Published: 2026-06-20 15:24 – Updated: 2026-06-22 13:47
VLAI
EPSS
VEX
Title
Capgo - App Existence Oracle via GET /statistics/app/:app_id
Summary
Capgo before 12.128.2 contains an information disclosure vulnerability in the GET /statistics/app/:app_id endpoint that allows app-limited API keys to distinguish existing sibling app IDs through differential error responses. Attackers can enumerate real app IDs outside their allowed scope by observing 500 PGRST116 errors for inaccessible apps versus 401 errors for nonexistent apps, breaking tenant isolation.
Severity
4.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Cap-go/capgo/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/capgo-app-ex… | third-party-advisory |
Impacted products
Date Public
2026-05-07 00:00
Credits
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CVE-2026-56316 (GCVE-0-2026-56316)
Vulnerability from cvelistv5 – Published: 2026-06-21 13:26 – Updated: 2026-06-24 17:56
VLAI
EPSS
VEX
Title
Cap-go - Job Existence Oracle via Unauthenticated OPTIONS /build/upload/:jobId/*
Summary
Cap-go before 12.128.2 contains an information disclosure vulnerability in the OPTIONS /build/upload/:jobId/* endpoint that allows unauthenticated attackers to enumerate valid builder job IDs through observable response discrepancies. Attackers can probe the endpoint without authentication to distinguish valid job IDs from invalid ones and generate sustained unauthenticated traffic for resource consumption.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Cap-go/capgo/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/cap-go-job-e… | third-party-advisory |
Impacted products
Date Public
2026-03-03 00:00
Credits
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CVE-2026-56296 (GCVE-0-2026-56296)
Vulnerability from cvelistv5 – Published: 2026-07-11 13:00 – Updated: 2026-07-13 15:19
VLAI
EPSS
VEX
Title
Cap-go - App Existence Oracle via Unauthenticated transfer_app RPC
Summary
Cap-go before 12.128.2 contains an information disclosure vulnerability in the public.transfer_app RPC function that returns distinct error messages for existing versus non-existing app IDs. Unauthenticated attackers can enumerate valid app IDs by observing error message differences when calling transfer_app with only the publishable API key.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/Cap-go/capgo/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/cap-go-app-e… | third-party-advisory |
Impacted products
Date Public
2026-03-03 00:00
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CVE-2026-47379 (GCVE-0-2026-47379)
Vulnerability from cvelistv5 – Published: 2026-06-23 20:17 – Updated: 2026-06-24 13:56
VLAI
EPSS
VEX
Title
NocoDB: Plaintext Password Comparison in Shared Views
Summary
NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, the shared-view password check fell back to strict-equality (===) comparison for legacy plaintext passwords, leaking the password's length and per-character prefix through response timing. This vulnerability is fixed in 2026.05.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/nocodb/nocodb/security/advisor… | x_refsource_CONFIRM |
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CVE-2026-45410 (GCVE-0-2026-45410)
Vulnerability from cvelistv5 – Published: 2026-05-28 21:23 – Updated: 2026-05-29 14:46
VLAI
EPSS
VEX
Title
Time-based user enumeration in TREK authentication endpoint
Summary
TREK is a collaborative travel planner. Prior to 3.0.18, early return on missing user during login flow allowed an attacker to enumerate valid user accounts via response timing discrepancy. When an email address existed in the database, the backend performed a bcrypt password comparison before returning a 401 Unauthorized, adding ~370 ms of latency. When the email did not exist, the backend returned immediately (~10 ms). This ~14× timing difference could be detected without any difference in HTTP status codes or response bodies. This vulnerability is fixed in 3.0.18.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/mauriceboe/TREK/security/advis… | x_refsource_CONFIRM |
| https://gist.github.com/jubnl/c2402adf85d946c1730… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mauriceboe | TREK |
Affected:
< 3.0.18
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CVE-2026-45294 (GCVE-0-2026-45294)
Vulnerability from cvelistv5 – Published: 2026-05-29 19:52 – Updated: 2026-06-02 01:56
VLAI
EPSS
VEX
Title
FreeScout: User Account Enumeration via Password Reset Response Differentiation
Summary
FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.219, the password reset endpoint returns visually distinct responses depending on whether the submitted email address belongs to an existing user account, allowing unauthenticated attackers to enumerate valid helpdesk agent email addresses. This vulnerability is fixed in 1.8.219.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/freescout-help-desk/freescout/… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| freescout-help-desk | freescout |
Affected:
< 1.8.219
|
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CVE-2026-44332 (GCVE-0-2026-44332)
Vulnerability from cvelistv5 – Published: 2026-07-08 19:32 – Updated: 2026-07-09 14:33
VLAI
EPSS
VEX
Title
Fiber: Username Enumeration via Timing Oracle in BasicAuth Default Authorizer
Summary
Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username enumeration through response timing differences. This issue is fixed in version 3.3.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/gofiber/fiber/security/advisor… | x_refsource_CONFIRM |
| https://github.com/gofiber/fiber/pull/4245 | x_refsource_MISC |
| https://github.com/gofiber/fiber/commit/c7ac00edd… | x_refsource_MISC |
| https://github.com/gofiber/fiber/releases/tag/v3.3.0 | x_refsource_MISC |
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CVE-2026-44263 (GCVE-0-2026-44263)
Vulnerability from cvelistv5 – Published: 2026-05-07 13:42 – Updated: 2026-05-07 15:02
VLAI
EPSS
VEX
Title
Weblate: Private Translation Enumeration via Screenshot API
Summary
Weblate is a web based localization tool. Prior to version 5.17.1, the screenshots, tasks, and component link API allowed for the enumeration of translations in a project inaccessible to the user. This issue has been patched in version 5.17.1.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/WeblateOrg/weblate/security/ad… | x_refsource_CONFIRM |
| https://github.com/WeblateOrg/weblate/pull/19258 | x_refsource_MISC |
| https://github.com/WeblateOrg/weblate/commit/6cf8… | x_refsource_MISC |
| https://github.com/WeblateOrg/weblate/releases/ta… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| WeblateOrg | weblate |
Affected:
< 5.17.1
|
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Mitigation MIT-46
Architecture and Design
Strategy: Separation of Privilege
- Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
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.
CAPEC-189: Black Box Reverse Engineering
An adversary discovers the structure, function, and composition of a type of computer software through black box analysis techniques. 'Black Box' methods involve interacting with the software indirectly, in the absence of direct access to the executable object. Such analysis typically involves interacting with the software at the boundaries of where the software interfaces with a larger execution environment, such as input-output vectors, libraries, or APIs. Black Box Reverse Engineering also refers to gathering physical side effects of a hardware device, such as electromagnetic radiation or sounds.