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.
849 vulnerabilities reference this CWE, most recent first.
CVE-2026-67193 (GCVE-0-2026-67193)
Vulnerability from cvelistv5 – Published: 2026-07-29 15:51 – Updated: 2026-07-29 17:53
VLAI
EPSS
VEX
Title
Xlight FTP Server < 3.9.5 Information Disclosure via USER Command
Summary
Xlight FTP Server before 3.9.5 contains an information disclosure vulnerability that allows unauthenticated attackers to obtain the server's current GetTickCount() value by sending a USER command with a username ending in the :adm suffix. Attackers can trigger the admin protocol path within the standard FTP listener pre-authentication to leak timing information from the FTP 331 response without requiring a separate port or configuration change.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://www.xlightftpd.com/whatsnew.htm | release-notes |
| https://www.vulncheck.com/advisories/xlight-ftp-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Xlight | Xlight FTP Server |
Affected:
0 , < 3.9.5
(semver)
|
Date Public
2026-07-01 00:00
Credits
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CVE-2026-65314 (GCVE-0-2026-65314)
Vulnerability from cvelistv5 – Published: 2026-07-21 21:05 – Updated: 2026-07-22 15:35
VLAI
EPSS
VEX
Title
Electric Postgres Sync Excluded-Column Value Inference via Subset Where Clauses
Summary
Electric Postgres Sync versions below 1.6.10 contains an information disclosure vulnerability that allows attackers to infer the values of excluded columns by crafting subset where clause conditions against shape responses. Attackers can observe whether subset where conditions match rows to deduce sensitive field data even though those columns are not returned in shape responses, bypassing column-based access restrictions.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/electric-sql/electric/security… | vendor-advisory |
| https://github.com/electric-sql/electric | patch |
| https://www.vulncheck.com/advisories/electric-pos… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ElectricSQL | Electric Postgres Sync |
Affected:
0 , ≤ 1.6.10
(semver)
|
Date Public
2026-07-21 00:00
Credits
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CVE-2026-64822 (GCVE-0-2026-64822)
Vulnerability from cvelistv5 – Published: 2026-07-21 20:28 – Updated: 2026-07-22 14:30 X_Open Source
VLAI
EPSS
VEX
Title
djangoSIGE 1.10 User Enumeration via ForgotPasswordView
Summary
djangoSIGE through 1.10 (commit a6fe7e8) contains a user enumeration vulnerability in ForgotPasswordView within djangosige/apps/login/views.py that allows unauthenticated attackers to identify valid accounts by observing distinct error messages returned by the password reset endpoint. Attackers can submit arbitrary usernames or email addresses to the POST login/esqueceu/ endpoint and distinguish between existing and non-existing accounts based on observable discrepancies in the application's responses.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/americooo/pentest-writeups/tre… | technical-descriptionexploit |
| https://github.com/thiagopena/djangoSIGE/pull/163 | issue-tracking |
| https://www.vulncheck.com/advisories/djangosige-u… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| thiagopena | djangoSIGE |
Affected:
0 , ≤ 1.10
(custom)
Affected: 0 , ≤ a6fe7e8e3a7d52ba0a25305df4e5e7e0cd5f5792 (git) |
Date Public
2026-07-21 00:00
Credits
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CVE-2026-59640 (GCVE-0-2026-59640)
Vulnerability from cvelistv5 – Published: 2026-08-03 00:55 – Updated: 2026-08-03 13:25
VLAI
EPSS
VEX
Title
OpenPGP CFB quick-check oracle active on symmetric/session-key paths
Summary
In Bouncy Castle for Java before 1.85, OpenPGP CFB quick-check oracle active on symmetric/session-key paths. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/bcgit/bc-java/wiki/CVE%E2%80%9… | vendor-advisory |
| https://github.com/bcgit/bc-java/commit/6b94b1c14… | patch |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
0 , < 1.85
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA |
Affected:
2.73.0 , < 2.73.12
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-FJA |
Affected:
1.0.0 , < 1.0.13
(maven)
Affected: 2.0.0 , < 2.0.13 (maven) Affected: 2.1.0 , < 2.1.13 (maven) |
Credits
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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-2026-56339 (GCVE-0-2026-56339)
Vulnerability from cvelistv5 – Published: 2026-07-15 11:25 – Updated: 2026-07-15 18:38
VLAI
EPSS
VEX
Title
Capgo - Unauthenticated Organization Existence Enumeration via rescind_invitation RPC
Summary
Capgo (Cap-go/capgo) before 12.128.2 contains an information disclosure vulnerability in the Supabase PostgREST SECURITY DEFINER RPC function public.rescind_invitation that allows unauthenticated attackers to enumerate organization existence. The function returns distinct error messages (NO_ORG vs NO_RIGHTS) when called with only a publishable API key, enabling attackers to discover valid organization IDs and increase the attack surface for targeted phishing or social engineering campaigns.
Severity
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
Credits
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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
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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
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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 |
|---|---|
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| https://www.vulncheck.com/advisories/cap-go-job-e… | third-party-advisory |
Impacted products
Date Public
2026-03-03 00:00
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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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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.