Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-126s-vxje-v7f7
Vulnerability ID VCID-126s-vxje-v7f7
Aliases CVE-2026-42203
GHSA-xqmj-j6mv-4862
Summary LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. From version 1.80.5 to before version 1.83.7, the POST /prompts/test endpoint accepted user-supplied prompt templates and rendered them without sandboxing. A crafted template could run arbitrary code inside the LiteLLM Proxy process. The endpoint only checks that the caller presents a valid proxy API key, so any authenticated user could reach it. Depending on how the proxy is deployed, this could expose secrets in the process environment (such as provider API keys or database credentials) and allow commands to be run on the host. This issue has been patched in version 1.83.7.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
CWE-94 Improper Control of Generation of Code ('Code Injection')
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 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-42203.json
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-42203
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-xqmj-j6mv-4862
cvssv4 8.6 https://github.com/BerriAI/litellm
generic_textual HIGH https://github.com/BerriAI/litellm
cvssv4 8.6 https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
generic_textual HIGH https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
ssvc Track https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
cvssv3.1_qr HIGH https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
cvssv4 8.6 https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
generic_textual HIGH https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
ssvc Track https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
cvssv4 8.6 https://nvd.nist.gov/vuln/detail/CVE-2026-42203
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-42203
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-42203.json
https://api.first.org/data/v1/epss?cve=CVE-2026-42203
https://github.com/BerriAI/litellm
https://nvd.nist.gov/vuln/detail/CVE-2026-42203
2467917 https://bugzilla.redhat.com/show_bug.cgi?id=2467917
GHSA-xqmj-j6mv-4862 https://github.com/advisories/GHSA-xqmj-j6mv-4862
GHSA-xqmj-j6mv-4862 https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
v1.83.7-stable https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-42203.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:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
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:N/T:T/P:M/B:A/M:M/D:T/2026-05-08T14:36:50Z/ Found at https://github.com/BerriAI/litellm/releases/tag/v1.83.7-stable
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
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:N/T:T/P:M/B:A/M:M/D:T/2026-05-08T14:36:50Z/ Found at https://github.com/BerriAI/litellm/security/advisories/GHSA-xqmj-j6mv-4862
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-42203
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 0.20827
EPSS Score 0.00067
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:44:16.489578+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/42xxx/CVE-2026-42203.json 38.6.0