Known exploited · BerriAI

CVE-2026-42271: BerriAI LiteLLM Command Injection Vulnerability

What it is

BerriAI LiteLLM contains a command injection vulnerability that could allow any authenticated user, including holders of low-privilege internal-user keys, to run arbitrary commands on the host.

Added June 8, 2026Due June 22, 2026CISA KEV catalog 2026.10.01

Vendor: BerriAI
Product: LiteLLM
Added to KEV: June 8, 2026
CISA due date: June 22, 2026
Ransomware use: Unknown
Weakness: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'), CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

What CISA requires

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Forensic triage

What to do now

Find every instance of LiteLLM you run, including the forgotten ones, and check its version against the vendor advisory.
Apply the vendor's fix or mitigation, before June 22, 2026 if you are bound by CISA's deadline, sooner if it faces the internet.
Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
Until every instance is patched, block the attack at the edge: a WAF in blocking mode stops OS command injection payloads, including Shellshock.

References

CVE-2026-42271 in the National Vulnerability Database

The Dome

Block it at the edge while you patch

The Dome's WAF runs the OWASP Core Rule Set in blocking mode and stops OS command injection payloads, including Shellshock before they reach your application.

See the Dome

T Academy

Train the engineers who fix it

Security engineering on real hosts in the browser, every objective checked on the machine. The first two lessons of Linux 1 are free.

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Source: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.