CVE-2026-93355

HIGH

8.1

CVSS v3

Description

LiteLLM contains a weak authentication vulnerability that allows an attacker holding a valid JWT from the configured identity provider to authenticate as any existing user by exploiting an email-based fallback lookup in the JWT authentication flow without verifying the email_verified claim. Attackers can present a token with an unverified email address matching a victim's account to inherit the victim's role, including proxy_admin privileges, and permanently overwrite the victim's stored identity binding to retain persistent unauthorized access to administrative endpoints exposing API keys and user management.

CWE-1390

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

0.27%probability of exploitation in 30 days

18thpercentile

Low risk: more likely to be exploited than 18% of all known CVEs.

References

Other references2

Related Vulnerabilities

Other CWE-1390 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2026-55040	Critical	9.1	70%	KEV	Fix
CVE-2025-40554	Critical	9.8	61%	-	Fix
CVE-2025-40552	Critical	9.8	52%	-	Fix
CVE-2025-27740	High	8.8	3.5%	-	Fix
CVE-2024-49019	High	7.8	2.0%	-	Fix
CVE-2024-38239	High	7.2	1.7%	-	Fix

Common questions

How do I fix CVE-2026-93355?

No published fix for CVE-2026-93355 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

Is CVE-2026-93355 being actively exploited?

Not that we know of. CVE-2026-93355 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.27% is the estimated probability that it will be exploited in the next 30 days. That is higher than 18% of all scored CVEs.

How severe is CVE-2026-93355?

CVE-2026-93355 has a CVSS v3 base score of 8.1, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-09-30.