---
id: CVE-2026-10813
title: A flaw has been found in LMCache up to 0.5.4
summary: >-
  A flaw has been found in LMCache up to 0.5.4. This affects the function
  hex_hash_to_int16 of the file lmcache/integration/vllm/utils.py of the
  component KV Cache Handler. Executing a manipulation can lead to use of weak
  hash. The attack …
severity: low
cvss: 3.6
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-327
  - CWE-328
vendor: lmcache
product: LMCache
affected:
  - LMCache 0.5.0
  - LMCache 0.5.1
  - LMCache 0.5.2
  - LMCache 0.5.3
  - LMCache 0.5.4
published: '2026-06-04'
updated: '2026-10-17'
sourceUpdated: '2026-10-17T07:16:49.720'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-10813'
references:
  - url: 'https://github.com/LMCache/LMCache/'
    label: cna@vuldb.com
  - url: >-
      https://github.com/LMCache/LMCache/commit/ce08eea76ce5898200efee55f4932fd07a7cabeb
    label: cna@vuldb.com
  - url: 'https://github.com/LMCache/LMCache/issues/3301'
    label: cna@vuldb.com
  - url: 'https://github.com/LMCache/LMCache/pull/4783'
    label: cna@vuldb.com
  - url: 'https://pypi.org/project/lmcache/0.5.5/'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-10813'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/831641'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/368261'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/368261/cti'
    label: cna@vuldb.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-10813'
  - url: 'https://github.com/LMCache/LMCache/pull/2932'
  - url: 'https://github.com/LMCache/LMCache'
tags:
  - nvd
  - cve.org
  - exploit-available
  - osv
  - pip
epss: 0.00079
epssPercentile: 0.00137
aliases:
  - GHSA-3hh9-752g-5g22
ecosystem: pip
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-04T17:28:03.511680Z'
ingestedAt: '2026-07-16T18:59:41.428Z'
---

## Overview

A flaw has been found in LMCache up to 0.5.4. This affects the function hex_hash_to_int16 of the file lmcache/integration/vllm/utils.py of the component KV Cache Handler. Executing a manipulation can lead to use of weak hash. The attack needs to be launched locally. The attack requires a high level of complexity. It is indicated that the exploitability is difficult. The exploit has been published and may be used. Upgrading to version 0.5.5 is able to mitigate this issue. This patch is called ce08eea76ce5898200efee55f4932fd07a7cabeb. It is suggested to upgrade the affected component. A contributor of the project confirms: "hex_hash_to_int16() was introduced in 0.3.1 (PR #882, commit f5174701). It is not present in 0.3.0, and it is still present in 0.4.7 through 0.5.4."

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-10813)

Affected packages:

- `lmcache <= 0.4.6`

Source: https://osv.dev/vulnerability/GHSA-3hh9-752g-5g22