CVE-2026-42208

CVE Enrichment

CVSS: 9.3 CRITICAL
EPSS: 5.77%
EPSS Percentile: 93.02%
CISA KEV: YES — Known Exploited Vulnerability

Description

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.81.16 to before version 1.83.7, a database query used during proxy API key checks mixed the caller-supplied key value into the query text instead of passing it as a separate parameter. An unauthenticated attacker could send a specially crafted Authorization header to any LLM API route (for example POST /chat/completions) and reach this query through the proxy's error-handling path. An attacker could read data from the proxy's database and may be able to modify it, leading to unauthorised access to the proxy and the credentials it manages. This issue has been patched in version 1.83.7.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: security-advisories@github.com
Published: 08-May-2026 11:16
Last Modified: 15-Jul-2026 09:21
EPSS Date: 2026-10-20
CWE: CWE-89

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:N /
                            PR:N /
                            UI:N /
                            VC:H /
                            VI:H /
                            VA:H /
                            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

CISA KEV Details

Date Added: 2026-05-08
Remediation Due: 2026-05-11
Known Ransomware Campaign Use: Unknown
Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes: https://github.com/BerriAI/litellm/security/advisories/GHSA-r75f-5x8p-qvmc ; https://nvd.nist.gov/vuln/detail/CVE-2026-42208

Affected Products / Versions

litellm / litellm
Version / affected range: * · from (inclusive) 1.81.16 · before (exclusive) 1.83.7
cpe:2.3:a:litellm:litellm:*:*:*:*:*:*:*:*

References

Last enrichment sync: 21-Oct-2026 16:16
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

exploited within 24 hours of proof-of-concept publication and added to the KEV catalog on June 12. CVE-2026-42208 (LiteLLM) was exploited within 36 hours, with attackers targeting databases containing upstream LLM Sophos AI Security Report 2026: AI Accelerates Attacks and Expands Enterprise Exposure

CVE (2)

Malware (6)

People (9)

Threat Actors (7)

MITRE ATT&CK (8)

Vendors (4)

Products (12)

Tools (10)

Industries (1)

Countries (2)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.