LMCache: 16-bit multimodal hash collision can poison KV cache entries

低 3.6CVE-2026-10813 · GHSA-3hh9-752g-5g22 · PYSEC-2026-3480 · 04/06/2026 公開 · 17/10/2026 更新

要点

CVE-2026-10813 は lmcache に影響する深刻度「低」 (CVSS 3.6) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.08%（全脆弱性の 0.13% より高い）。
修正版の情報はまだありません。参考情報のベンダー勧告を確認してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
lmcache PyPI	`≤ 0.4.6`	修正版なし

概要

A flaw has been found in LMCache up to 0.4.6. 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. The pull request to fix this issue awaits acceptance.

NVD の説明

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."