CVE-2026-12797: Litellm BerriAI Litellm Has Security Feature Vulnerability

LOW
Advisory Identifier: GHSA-p897-vf7j-f5h8
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CVSS 6.3
CWE-285
Published
Advisory Summary

CVE-2026-12797 is a LOW (CVSS 6.3) berriai litellm has security feature vulnerability (CWE-285: Improper Authorization) affecting Litellm libraries in the PyPI ecosystem. The issue involves berriai litellm has security feature bypass in bannedkeywords and azurecontentsafety guardrails via call_type mismatch on async endpoints. Remediation is available in the latest vendor maintenance releases.

CVE-2026-12797 at a Glance

CVE Identifier CVE-2026-12797
GHSA Identifier GHSA-p897-vf7j-f5h8
Severity LOW
CVSS v3.1 Base Score 6.3
CWE Classification CWE-285: Improper Authorization
Affected Product Litellm
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-12797

To remediate this vulnerability, upgrade all affected Litellm dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

litellm fixed: Latest secure release 
pip install litellm>=Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show litellm

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-12797, inspect your installed packages using pip:

pip show litellm

Analyze the terminal output to locate any version of Litellm in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The pip show litellm command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-285: Improper Authorization, where the product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. In Litellm, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A security flaw has been discovered in BerriAI litellm up to 1.82.5. Affected is the function async_pre_call_hook of the file enterprise/enterprise_hooks/banned_keywords.py of the component Completions Interface. The manipulation of the argument prompt results in incorrect authorization. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure.

CVE-2026-12797 Affected Litellm Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
litellm
pypi/litellm
PyPI
≤ 1.82.5

References

NVD — CVE-2026-12797 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12797
Litellm Source Repository REPOSITORY
https://gist.github.com/YLChen-007/078179224f07cc4e39e4f141a18c817a
Litellm Source Repository REPOSITORY
https://github.com/BerriAI/litellm
vuldb.com/cve/cve-2026-12797 WEB
https://vuldb.com/cve/CVE-2026-12797
vuldb.com/submit/811288 WEB
https://vuldb.com/submit/811288
vuldb.com/vuln/372559 WEB
https://vuldb.com/vuln/372559
vuldb.com/vuln/372559/cti WEB
https://vuldb.com/vuln/372559/cti

Frequently Asked Questions

What is CVE-2026-12797?
CVE-2026-12797 is a security vulnerability in Litellm involving BerriAI litellm has Security Feature Bypass in BannedKeywords and AzureContentSafety Guardrails via call_type Mismatch on Async Endpoints under CWE-285: Improper Authorization.
Which Litellm versions are affected?
Affected versions include releases prior to current release patches across affected packages: litellm.
What version fixes CVE-2026-12797?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is litellm affected?
Yes, litellm is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-12797?
CVE-2026-12797 has a CVSS v3.1 base score of 6.3 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-12797?
CVE-2026-12797 is classified under CWE-285: Improper Authorization (The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.).
How can I check PyPI dependencies for CVE-2026-12797?
Run the dependency tree command: 'pip show litellm'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-p897-vf7j-f5h8",
  "modified" : "2026-09-14T18:11:28Z",
  "published" : "2026-06-21T12:30:52Z",
  "aliases" : [ "CVE-2026-12797" ],
  "summary" : "BerriAI litellm has Security Feature Bypass in BannedKeywords and AzureContentSafety Guardrails via call_type Mismatch on Async Endpoints",
  "details" : "A security flaw has been discovered in BerriAI litellm up to 1.82.5. Affected is the function async_pre_call_hook of the file enterprise/enterprise_hooks/banned_keywords.py of the component Completions Interface. The manipulation of the argument prompt results in incorrect authorization. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "litellm"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.82.5"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-12797"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/YLChen-007/078179224f07cc4e39e4f141a18c817a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/BerriAI/litellm"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/cve/CVE-2026-12797"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/811288"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/372559"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/372559/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-285" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-14T18:11:28Z",
    "nvd_published_at" : "2026-06-21T10:16:16Z"
  }
}