CWE-639
AllowedAuthorization Bypass Through User-Controlled Key
Abstraction: Base · Status: Incomplete
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
3310 vulnerabilities reference this CWE, most recent first.
GHSA-GC4C-8J88-M8PM
Vulnerability from github – Published: 2026-05-14 06:31 – Updated: 2026-05-14 06:31The LearnPress – WordPress LMS Plugin for Create and Sell Online Courses plugin for WordPress is vulnerable to payment bypass through user-controlled key in all versions up to, and including, 4.3.5. This is due to improper handling of user-supplied request parameters in the REST API endpoint, which passes the unsanitized parameter array to the add_to_cart() function where array_merge() allows attacker-controlled values to overwrite hardcoded defaults. This makes it possible for authenticated attackers, with subscriber-level access and above, to enroll in any paid course entirely free of charge by supplying a quantity value of zero, which causes the order total to calculate as $0 and bypasses all payment gateway requirements.
{
"affected": [],
"aliases": [
"CVE-2026-7648"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-14T05:16:46Z",
"severity": "MODERATE"
},
"details": "The LearnPress \u2013 WordPress LMS Plugin for Create and Sell Online Courses plugin for WordPress is vulnerable to payment bypass through user-controlled key in all versions up to, and including, 4.3.5. This is due to improper handling of user-supplied request parameters in the REST API endpoint, which passes the unsanitized parameter array to the add_to_cart() function where array_merge() allows attacker-controlled values to overwrite hardcoded defaults. This makes it possible for authenticated attackers, with subscriber-level access and above, to enroll in any paid course entirely free of charge by supplying a quantity value of zero, which causes the order total to calculate as $0 and bypasses all payment gateway requirements.",
"id": "GHSA-gc4c-8j88-m8pm",
"modified": "2026-05-14T06:31:32Z",
"published": "2026-05-14T06:31:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7648"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.3/inc/cart/class-lp-cart.php#L105"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.3/inc/cart/class-lp-cart.php#L180"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/learnpress/tags/4.3.3/inc/rest-api/v1/frontend/class-lp-rest-courses-controller.php#L474"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/cart/class-lp-cart.php#L105"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/cart/class-lp-cart.php#L180"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/learnpress/trunk/inc/rest-api/v1/frontend/class-lp-rest-courses-controller.php#L474"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3521636%40learnpress\u0026new=3521636%40learnpress\u0026sfp_email=\u0026sfph_mail="
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/564ec4a6-20d3-4b46-8637-fc1de586e19a?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-GC4H-XC67-2W55
Vulnerability from github – Published: 2026-03-27 15:30 – Updated: 2026-03-27 15:30Vulnerable versions of Coverity Connect lack an error handler in the authentication logic for command line tooling that makes it vulnerable to an authentication bypass. A malicious actor with access to the /token API endpoint that either knows or guesses a valid username, can use this in a specially crafted HTTP request to bypass authentication. Successful exploitation allows the malicious actor to assume all roles and privileges granted to the valid user’s Coverity Connect account.
{
"affected": [],
"aliases": [
"CVE-2026-1496"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-27T15:16:48Z",
"severity": "CRITICAL"
},
"details": "Vulnerable versions of Coverity Connect lack an error handler in the authentication logic for command line tooling that makes it vulnerable to an authentication bypass.\u00a0A malicious actor with access to the\u00a0/token\u00a0API endpoint that either knows or guesses a valid username, can use this in a specially crafted HTTP request to bypass authentication.\u00a0Successful exploitation allows the malicious actor to assume all roles and privileges granted to the valid user\u2019s Coverity Connect account.",
"id": "GHSA-gc4h-xc67-2w55",
"modified": "2026-03-27T15:30:26Z",
"published": "2026-03-27T15:30:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1496"
},
{
"type": "WEB",
"url": "https://community.blackduck.com/s/article/Black-Duck-Security-Advisory-CVE-2026-1496"
},
{
"type": "WEB",
"url": "https://community.blackduck.com/s/article/Instructions-on-how-to-block-token-endpoint-for-Coverity-Connect"
},
{
"type": "WEB",
"url": "https://community.blackduck.com/s/article/WAF-IDS-IPS-Mitigation-Guidance"
},
{
"type": "WEB",
"url": "https://github.com/blackduck-inc/Coverity-Usage-Log-Analyzer"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-GC6R-XC3X-9VVG
Vulnerability from github – Published: 2025-12-18 00:34 – Updated: 2025-12-18 00:34ProjectSend r1605 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to download private files by manipulating the download ID parameter. Attackers can access any user's private files by changing the 'id' parameter in the download request to process.php.
{
"affected": [],
"aliases": [
"CVE-2023-53930"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-12-17T23:15:52Z",
"severity": "HIGH"
},
"details": "ProjectSend r1605 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to download private files by manipulating the download ID parameter. Attackers can access any user\u0027s private files by changing the \u0027id\u0027 parameter in the download request to process.php.",
"id": "GHSA-gc6r-xc3x-9vvg",
"modified": "2025-12-18T00:34:08Z",
"published": "2025-12-18T00:34:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53930"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/51400"
},
{
"type": "WEB",
"url": "https://www.projectsend.org"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/projectsend-insecure-direct-object-reference-file-download-vulnerability"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-GCGW-Q47M-PRVJ
Vulnerability from github – Published: 2023-12-12 03:31 – Updated: 2024-09-30 18:52Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-59c9-pxq8-9c73. This link is maintained to preserve external references.
Original Description
SAP BTP Security Services Integration Library ([Java] cloud-security-services-integration-library) - versions below 2.17.0 and versions from 3.0.0 to before 3.3.0, allow under certain conditions an escalation of privileges. On successful exploitation, an unauthenticated attacker can obtain arbitrary permissions within the application.
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.sap.cloud.security:java-security"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.17.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.sap.cloud.security:java-security"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.3.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.sap.cloud.security.xsuaa:spring-xsuaa"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.17.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.sap.cloud.security.xsuaa:spring-xsuaa"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.3.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.sap.cloud.security:spring-security"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.17.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.sap.cloud.security:spring-security"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.3.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-269",
"CWE-639",
"CWE-749"
],
"github_reviewed": true,
"github_reviewed_at": "2023-12-15T03:53:07Z",
"nvd_published_at": "2023-12-12T02:15:08Z",
"severity": "CRITICAL"
},
"details": "## Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-59c9-pxq8-9c73. This link is maintained to preserve external references.\n\n## Original Description\nSAP\u00a0BTP\u00a0Security Services Integration Library ([Java] cloud-security-services-integration-library) -\u00a0versions below 2.17.0 and versions from 3.0.0 to before 3.3.0, allow under certain conditions an escalation of privileges. On successful exploitation, an unauthenticated attacker can obtain arbitrary permissions within the application.\n\n",
"id": "GHSA-gcgw-q47m-prvj",
"modified": "2024-09-30T18:52:44Z",
"published": "2023-12-12T03:31:45Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/SAP/cloud-security-services-integration-library/security/advisories/GHSA-59c9-pxq8-9c73"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-50422"
},
{
"type": "WEB",
"url": "https://blogs.sap.com/2023/12/12/unveiling-critical-security-updates-sap-btp-security-note-3411067"
},
{
"type": "PACKAGE",
"url": "https://github.com/SAP/cloud-security-services-integration-library"
},
{
"type": "WEB",
"url": "https://me.sap.com/notes/3411067"
},
{
"type": "WEB",
"url": "https://me.sap.com/notes/3413475"
},
{
"type": "WEB",
"url": "https://mvnrepository.com/artifact/com.sap.cloud.security.xsuaa/spring-xsuaa"
},
{
"type": "WEB",
"url": "https://mvnrepository.com/artifact/com.sap.cloud.security/java-security"
},
{
"type": "WEB",
"url": "https://mvnrepository.com/artifact/com.sap.cloud.security/spring-security"
},
{
"type": "WEB",
"url": "https://www.sap.com/documents/2022/02/fa865ea4-167e-0010-bca6-c68f7e60039b.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Duplicate Advisory: Improper JWT Signature Validation in SAP Security Services Library ",
"withdrawn": "2024-09-30T18:52:44Z"
}
GHSA-GCRV-H884-8Q69
Vulnerability from github – Published: 2026-05-28 06:31 – Updated: 2026-05-28 06:31The Timetable and Event Schedule by MotoPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.4.16 via the action_get_event_data due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to enumerate timeslot IDs and read the full WP_Post object — including post_content, post_excerpt, post_status, and post_author — of draft, pending, and private mp-event posts belonging to other users, along with their associated raw timeslot descriptions.
{
"affected": [],
"aliases": [
"CVE-2026-9228"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-28T05:16:39Z",
"severity": "MODERATE"
},
"details": "The Timetable and Event Schedule by MotoPress plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.4.16 via the action_get_event_data due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to enumerate timeslot IDs and read the full WP_Post object \u2014 including post_content, post_excerpt, post_status, and post_author \u2014 of draft, pending, and private mp-event posts belonging to other users, along with their associated raw timeslot descriptions.",
"id": "GHSA-gcrv-h884-8q69",
"modified": "2026-05-28T06:31:09Z",
"published": "2026-05-28T06:31:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9228"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/mp-timetable/tags/2.4.16/classes/class-core.php#L311"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/mp-timetable/tags/2.4.16/classes/class-hooks.php#L152"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/mp-timetable/tags/2.4.16/classes/controllers/class-controller-events.php#L62"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/browser/mp-timetable/tags/2.4.16/classes/models/class-events.php#L102"
},
{
"type": "WEB",
"url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3548166%40mp-timetable\u0026new=3548166%40mp-timetable\u0026sfp_email=\u0026sfph_mail="
},
{
"type": "WEB",
"url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9adf94ac-30ef-4c24-afa6-04248c25bd7f?source=cve"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-GCV8-GH4R-25X6
Vulnerability from github – Published: 2022-02-17 00:00 – Updated: 2022-04-01 18:06Attacker can use case-insensitive protocol schemes like HTTP, htTP, HTtp etc. in order to bypass the patch for CVE-2021-3647.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "urijs"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.19.8"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2022-0613"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": true,
"github_reviewed_at": "2022-02-17T23:36:53Z",
"nvd_published_at": "2022-02-16T09:15:00Z",
"severity": "MODERATE"
},
"details": "Attacker can use case-insensitive protocol schemes like HTTP, htTP, HTtp etc. in order to bypass the patch for CVE-2021-3647.",
"id": "GHSA-gcv8-gh4r-25x6",
"modified": "2022-04-01T18:06:53Z",
"published": "2022-02-17T00:00:35Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-0613"
},
{
"type": "WEB",
"url": "https://github.com/medialize/uri.js/commit/6ea641cc8648b025ed5f30b090c2abd4d1a5249f"
},
{
"type": "PACKAGE",
"url": "https://github.com/medialize/uri.js"
},
{
"type": "WEB",
"url": "https://huntr.dev/bounties/f53d5c42-c108-40b8-917d-9dad51535083"
},
{
"type": "WEB",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MXSSATHALUSXXD2KT6UFZAX7EG4GR332"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Authorization Bypass Through User-Controlled Key in urijs"
}
GHSA-GF35-P27P-QQWM
Vulnerability from github – Published: 2024-09-11 12:30 – Updated: 2024-09-18 21:30This vulnerability exists in Reedos aiM-Star version 2.0.1 due to improper access controls on its certain API endpoints. An authenticated remote attacker could exploit this vulnerability by manipulating a parameter through API request URL which could lead to gain unauthorized access to sensitive information belonging to other users.
{
"affected": [],
"aliases": [
"CVE-2024-45786"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-09-11T12:15:01Z",
"severity": "HIGH"
},
"details": "This vulnerability exists in Reedos aiM-Star version 2.0.1 due to improper access controls on its certain API endpoints. An authenticated remote attacker could exploit this vulnerability by manipulating a parameter through API request URL which could lead to gain unauthorized access to sensitive information belonging to other users.",
"id": "GHSA-gf35-p27p-qqwm",
"modified": "2024-09-18T21:30:44Z",
"published": "2024-09-11T12:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-45786"
},
{
"type": "WEB",
"url": "https://www.cert-in.org.in/s2cMainServlet?pageid=PUBVLNOTES01\u0026VLCODE=CIVN-2024-0291"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-GF86-95FV-CJGF
Vulnerability from github – Published: 2024-03-18 03:30 – Updated: 2024-03-18 03:30A vulnerability has been found in SourceCodester Employee Task Management System 1.0 and classified as critical. This vulnerability affects unknown code of the file /update-employee.php. The manipulation of the argument admin_id leads to authorization bypass. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-257080.
{
"affected": [],
"aliases": [
"CVE-2024-2577"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-03-18T03:15:06Z",
"severity": "HIGH"
},
"details": "A vulnerability has been found in SourceCodester Employee Task Management System 1.0 and classified as critical. This vulnerability affects unknown code of the file /update-employee.php. The manipulation of the argument admin_id leads to authorization bypass. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-257080.",
"id": "GHSA-gf86-95fv-cjgf",
"modified": "2024-03-18T03:30:32Z",
"published": "2024-03-18T03:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-2577"
},
{
"type": "WEB",
"url": "https://github.com/skid-nochizplz/skid-nochizplz/blob/main/TrashBin/CVE/SOURCECODESTER%20Employee%20Task%20Management%20System/IDOR%20-%20update-employee.php.md"
},
{
"type": "WEB",
"url": "https://vuldb.com/?ctiid.257080"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.257080"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
GHSA-GFM2-XM6C-37QC
Vulnerability from github – Published: 2026-05-14 20:24 – Updated: 2026-05-15 23:54Summary
Any user X can continue the conversation of any other user Y, as long as the Chat ID of Y is known. User X does not even need to be an admin to do so.
Details
A user just needs to use the API endpoint: /api/chat/completions with their own API key (generated in OWUI) and the Chat ID of another user. OWUI does not check to match the Chat ID with the user that created that Chat ID. Note that both users will need access to the same model. This is especially relevant if there is a shared pipeline model between users.
PoC
- Using OWUI v0.6.18
- Sign in with any user
X - Generate an API Key for user
Xusing the settings - Create another user
Y, and have a conversation in OWUI. Copy the Chat ID from the URL. - User
Xcan now use the API/api/chat/completionsand the Chat ID from step 4 to continue the conversation of userY
Impact
Large impact to any user in OWUI. People can read your conversations, and access private information if they know your Chat ID (which is in the URL of the chat).
Resolution
Fixed in commit cf4218e68, first released in v0.9.0 (Apr 2026). The chat_completion handler at backend/open_webui/main.py:1868 now explicitly verifies chat ownership via Chats.is_chat_owner(chat_id, user.id) for any request that targets an existing chat, and raises 404 for non-owners (admin bypass preserved per the documented threat model). New chats (no chat_id supplied, or freshly inserted via the is_new_chat branch) are unaffected. Users on >= 0.9.0 are not affected.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 0.8.12"
},
"package": {
"ecosystem": "PyPI",
"name": "open-webui"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.9.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-45349"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": true,
"github_reviewed_at": "2026-05-14T20:24:35Z",
"nvd_published_at": "2026-05-15T20:16:48Z",
"severity": "HIGH"
},
"details": "### Summary\nAny user `X` can continue the conversation of any other user `Y`, as long as the Chat ID of `Y` is known. User `X` does not even need to be an admin to do so. \n\n### Details\nA user just needs to use the API endpoint: `/api/chat/completions` with their own API key (generated in OWUI) and the Chat ID of another user. **OWUI does not check to match the Chat ID with the user that created that Chat ID**. Note that both users will need access to the same model. This is especially relevant if there is a shared pipeline model between users. \n\n### PoC\n1. Using OWUI v0.6.18\n2. Sign in with any user `X`\n3. Generate an API Key for user `X` using the settings\n4. Create another user `Y`, and have a conversation in OWUI. Copy the Chat ID from the URL.\n5. User `X` can now use the API `/api/chat/completions` and the Chat ID from step 4 to continue the conversation of user `Y`\n\n### Impact\nLarge impact to any user in OWUI. People can read your conversations, and access private information if they know your Chat ID (which is in the URL of the chat). \n\n## Resolution\n\nFixed in commit [cf4218e68](https://github.com/open-webui/open-webui/commit/cf4218e688def6f11d195aeda6665ae5b5376b67), first released in **v0.9.0** (Apr 2026). The `chat_completion` handler at `backend/open_webui/main.py:1868` now explicitly verifies chat ownership via `Chats.is_chat_owner(chat_id, user.id)` for any request that targets an existing chat, and raises 404 for non-owners (admin bypass preserved per the documented threat model). New chats (no `chat_id` supplied, or freshly inserted via the `is_new_chat` branch) are unaffected. Users on `\u003e= 0.9.0` are not affected.",
"id": "GHSA-gfm2-xm6c-37qc",
"modified": "2026-05-15T23:54:00Z",
"published": "2026-05-14T20:24:35Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-gfm2-xm6c-37qc"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45349"
},
{
"type": "WEB",
"url": "https://github.com/open-webui/open-webui/commit/cf4218e688def6f11d195aeda6665ae5b5376b67"
},
{
"type": "PACKAGE",
"url": "https://github.com/open-webui/open-webui"
},
{
"type": "WEB",
"url": "https://github.com/open-webui/open-webui/releases/tag/v0.9.0"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "Open WebUI has Broken Access Control for Completions API"
}
GHSA-GFRH-QJ3C-QWRR
Vulnerability from github – Published: 2026-06-11 18:31 – Updated: 2026-06-11 18:31IBM Langflow OSS 1.0.0 through 1.9.1 could allow an authenticated user to read or modify sensitive information by bypassing authentication using insecure direct object references.
{
"affected": [],
"aliases": [
"CVE-2026-7787"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-06-11T16:16:25Z",
"severity": "HIGH"
},
"details": "IBM Langflow OSS 1.0.0 through 1.9.1 could allow an authenticated user to read or modify sensitive information by bypassing authentication using insecure direct object references.",
"id": "GHSA-gfrh-qj3c-qwrr",
"modified": "2026-06-11T18:31:34Z",
"published": "2026-06-11T18:31:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7787"
},
{
"type": "WEB",
"url": "https://www.ibm.com/support/pages/node/7275453"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
}
]
}
Mitigation
For each and every data access, ensure that the user has sufficient privilege to access the record that is being requested.
Mitigation
Make sure that the key that is used in the lookup of a specific user's record is not controllable externally by the user or that any tampering can be detected.
Mitigation
Use encryption in order to make it more difficult to guess other legitimate values of the key or associate a digital signature with the key so that the server can verify that there has been no tampering.
No CAPEC attack patterns related to this CWE.