KEV / Record
CVE-2026-59822: BerriAI LiteLLM Improper Authentication Vulnerability
Answer CVE-2026-59822 is in CISA's Known Exploited Vulnerabilities catalog. It was added on 2026-09-02, and US federal civilian agencies must act on it by 2026-09-16.
DCISA description
BerriAI LiteLLM contains an improper authentication vulnerability in the MCP Streamable HTTP endpoint that could allow an unauthenticated attacker to establish an authenticated MCP session using an arbitrary Bearer token.
ARequired action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
RNotes and references
https://github.com/BerriAI/litellm/security/advisories/GHSA-7488-6r32-c95q ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-59822
FRecord
- CVE
- CVE-2026-59822
- Vendor
- BerriAI (3 entries in KEV)
- Product
- LiteLLM (3 entries)
- Added to KEV
- Federal due date
- Past due date (2026-09-16)
- Remediation window
- 14 days
- Known ransomware use
- Unknown (not confirmed by CISA)
VOther BerriAI entries in KEV
| CVE | Product | Added | Ransomware |
|---|---|---|---|
| CVE-2026-42271 | LiteLLM | Unknown | |
| CVE-2026-42208 | LiteLLM | Unknown |
This record repeats CISA's entry and is excluded from search indexes until an analyst note is added.
Source: CISA KEV catalog v2026.09.23, released 2026-09-23. Windows end 2026-09-23.