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Critical

LMCache through 0.5.5 Unauthenticated RCE via /run_script Endpoint

Type: advisorySource: Official CVE List1 source record

LMCache through 0.5.5 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute Python code by posting scripts to the /run_script endpoint. Attackers can recover real builtins through the injected FastAPI app object, bypassing the guarded __import__, to import os and run operating system commands as the LMCache process.

Announced Source revision 1
Original source ↗

CVE-2026-107204

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-107204

LMCache

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "LMCache",
    "product": "LMCache",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "versionType": "semver",
        "lessThanOrEqual": "0.5.5"
      }
    ],
    "packageURL": "pkg:pypi/lmcache",
    "defaultStatus": "unaffected"
  }
]
Related CVEs
CVE-2026-107204

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#12026 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement