CVE-2026-42208
Unauthenticated header leads to data exposure and proxy credential access.
Is CVE-2026-42208 being exploited?
Yes. CVE-2026-42208 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.
How severe is CVE-2026-42208?
CVE-2026-42208 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-42208?
Yes. A fix has been recorded for CVE-2026-42208. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-42208 affect?
CVE-2026-42208 affects LiteLLM proxy server (AI Gateway). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-42208?
Upgrade to v1.83.7+; fix header handling; rotate credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated header allows reading/modifying proxy DB and accessing proxy credentials via API routes.
Patch when possible
- affected>= 1.81.16 and < 1.83.7
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.