CVE-2026-84377
CVE-2026-84377 — LiteLLM: Authenticated SSRF and provider-credential exfiltration via unvalidated request-body routing parameters
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to versions 1.88.6 and 1.96.2, any authenticated LiteLLM proxy user could redirect an outbound provider call to a destination the user controls and cause the proxy to send its configured provider credentials to that destination. Request validation in litellm/proxy/auth/auth_utils.py, litellm/proxy/common_request_processing.py, litellm/proxy/health_endpoints/_health_endpoints.py, litellm/proxy/image_endpoints/endpoints.py, and litellm/proxy/litellm_pre_call_utils.py used incomplete checks that did not cover every sensitive parameter or inspect equivalent values across nested request fields, path values, and bracket-notation form data. Routing and credential parameters including api_base, base_url, model_list, fallbacks, and litellm_credential_name could therefore be applied without clearing the…
Published Updated Sources: cvelistV5, GitHub_M
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.
Exploitation
Unreported
no source claims exploitation
EPSS
1%
chance of exploitation in 30 days
CVSS base
6.5
MEDIUM
CISA SSVC assessment
Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.
Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script all four kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component
Affected scope
The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.
Vendors (1)
Products (1)
Every base score collected
Sources score independently and disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Source |
|---|---|---|---|---|---|
| 6.5 | CVSS 3.1 | MEDIUM | — | — | cvelistV5 |
Weakness & attack patterns
- CWE-918
Detection
Read off the CVSS vector and the weakness class. Starting points, not rules we have tested.
- Search application, proxy, and WAF logs for requests touching /proxy/auth/auth_utils.py, /proxy/common_request_processing.py, /proxy/health_endpoints/_health_endpoints.py, /proxy/image_endpoints/endpoints.py, /proxy/litellm_pre_call_utils.py.
References
9 on the record
- github.com/BerriAI/litellm/security/advisories/GHSA-3cv6-jpf6-8222
x_refsource_CONFIRM
- github.com/BerriAI/litellm/pull/36011
x_refsource_MISC
- github.com/BerriAI/litellm/pull/36314
x_refsource_MISC
- github.com/BerriAI/litellm/pull/36494
x_refsource_MISC
- github.com/BerriAI/litellm/commit/473f72e63a9777d793fbbf57194d8ec4fb97bc1b
x_refsource_MISC
- github.com/BerriAI/litellm/commit/820f247a6abba55cd87d130bef7bba7be3b29d37
x_refsource_MISC
- github.com/BerriAI/litellm/commit/c898d341c02299cf2506d0d8e84cc67953043593
x_refsource_MISC
- github.com/BerriAI/litellm/releases/tag/v1.88.6
x_refsource_MISC
Elsewhere on this site
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.