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Vulnerability details: VCID-362j-e9vs-73gg
Vulnerability ID VCID-362j-e9vs-73gg
Aliases CVE-2026-35030
GHSA-jjhc-v7c2-5hh6
Summary LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.83.0, when JWT authentication is enabled (enable_jwt_auth: true), the OIDC userinfo cache uses token[:20] as the cache key. JWT headers produced by the same signing algorithm generate identical first 20 characters. This configuration option is not enabled by default. Most instances are not affected. An unauthenticated attacker can craft a token whose first 20 characters match a legitimate user's cached token. On cache hit, the attacker inherits the legitimate user's identity and permissions. This affects deployments with JWT/OIDC authentication enabled. Fixed in v1.83.0.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-287 Improper Authentication
CWE-222 Truncation of Security-relevant Information
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 9.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-35030.json
epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2026-35030
epss 0.00048 https://api.first.org/data/v1/epss?cve=CVE-2026-35030
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-jjhc-v7c2-5hh6
cvssv4 9.4 https://github.com/BerriAI/litellm
generic_textual CRITICAL https://github.com/BerriAI/litellm
cvssv3.1 9.1 https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
cvssv3.1_qr CRITICAL https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
cvssv4 9.4 https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
generic_textual CRITICAL https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
ssvc Track https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
cvssv4 9.4 https://nvd.nist.gov/vuln/detail/CVE-2026-35030
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2026-35030
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-35030.json
https://api.first.org/data/v1/epss?cve=CVE-2026-35030
https://github.com/BerriAI/litellm
https://nvd.nist.gov/vuln/detail/CVE-2026-35030
2455509 https://bugzilla.redhat.com/show_bug.cgi?id=2455509
GHSA-jjhc-v7c2-5hh6 https://github.com/advisories/GHSA-jjhc-v7c2-5hh6
GHSA-jjhc-v7c2-5hh6 https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
RHSA-2026:13545 https://access.redhat.com/errata/RHSA-2026:13545
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-35030.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N Found at https://github.com/BerriAI/litellm
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N Found at https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-04-07T14:24:02Z/ Found at https://github.com/BerriAI/litellm/security/advisories/GHSA-jjhc-v7c2-5hh6
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-35030
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.15477
EPSS Score 0.00048
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:45:00.767576+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/35xxx/CVE-2026-35030.json 38.6.0