CVE-2026-12773 (GCVE-0-2026-12773)
Vulnerability from cvelistv5 – Published: 2026-06-21 03:15 – Updated: 2026-06-30 12:06
VLAI
Title
BerriAI litellm MCP Proxy user_api_key_auth_mcp.py UserAPIKeyAuth improper authentication
Summary
A weakness has been identified in BerriAI litellm up to 1.59.8. Affected is the function UserAPIKeyAuth of the file litellm/proxy/_experimental/mcp_server/auth/user_api_key_auth_mcp.py of the component MCP Proxy. Executing a manipulation can lead to improper authentication. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/372515 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/372515/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-12773 | third-party-advisory |
| https://vuldb.com/submit/811282 | third-party-advisory |
| https://gist.github.com/YLChen-007/3cfaad10a69d7a… | exploit |
| https://access.redhat.com/security/cve/CVE-2026-12773 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2491112 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| BerriAI | litellm |
Affected:
1.59.0
Affected: 1.59.1 Affected: 1.59.2 Affected: 1.59.3 Affected: 1.59.4 Affected: 1.59.5 Affected: 1.59.6 Affected: 1.59.7 Affected: 1.59.8 cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:* |
|
| Red Hat | Exploit Intelligence |
cpe:/a:redhat:exploit_intelligence:0 |
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
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This could allow unauthorized access, potentially compromising the confidentiality, integrity, and availability of data within the system.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-303\", \"description\": \"Incorrect Implementation of Authentication Algorithm\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-06-30T02:46:35.096Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-12773\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-06-22T17:55:49.325110Z\"}}}], \"references\": [{\"url\": \"https://vuldb.com/submit/811282\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-06-22T17:55:29.912Z\"}}], \"cna\": {\"title\": \"BerriAI litellm MCP Proxy user_api_key_auth_mcp.py UserAPIKeyAuth improper authentication\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"Eric-c (VulDB User)\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"VulDB CNA Team\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.9, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P\"}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.3, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 7.3, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 7.5, \"vectorString\": \"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR\"}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*\"], \"vendor\": \"BerriAI\", \"modules\": [\"MCP Proxy\"], \"product\": \"litellm\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.59.0\"}, {\"status\": \"affected\", \"version\": \"1.59.1\"}, {\"status\": \"affected\", \"version\": \"1.59.2\"}, {\"status\": \"affected\", \"version\": \"1.59.3\"}, {\"status\": \"affected\", \"version\": \"1.59.4\"}, {\"status\": \"affected\", \"version\": \"1.59.5\"}, {\"status\": \"affected\", \"version\": \"1.59.6\"}, {\"status\": \"affected\", \"version\": \"1.59.7\"}, {\"status\": \"affected\", \"version\": \"1.59.8\"}]}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-06-20T00:00:00.000Z\", \"value\": \"Advisory disclosed\"}, {\"lang\": \"en\", \"time\": \"2026-06-20T02:00:00.000Z\", \"value\": \"VulDB entry created\"}, {\"lang\": \"en\", \"time\": \"2026-06-20T11:31:42.000Z\", \"value\": \"VulDB entry last update\"}], \"references\": [{\"url\": \"https://vuldb.com/vuln/372515\", \"name\": \"VDB-372515 | BerriAI litellm MCP Proxy user_api_key_auth_mcp.py UserAPIKeyAuth improper authentication\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/vuln/372515/cti\", \"name\": \"VDB-372515 | CTI Indicators (IOB, IOC, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/cve/CVE-2026-12773\", \"name\": \"CVE-2026-12773 | CVE Analysis and Report\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/811282\", \"name\": \"Submit #811282 | litellm \u003c= 1.59.8 Improper Authentication (CWE-287)\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://gist.github.com/YLChen-007/3cfaad10a69d7a15e4d4d458cb53309e\", \"tags\": [\"exploit\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A weakness has been identified in BerriAI litellm up to 1.59.8. 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"cveMetadata": "{\"cveId\": \"CVE-2026-12773\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-30T02:46:35.096Z\", \"dateReserved\": \"2026-06-20T09:26:26.143Z\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"datePublished\": \"2026-06-21T03:15:08.647Z\", \"assignerShortName\": \"VulDB\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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