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PatchSiren cyber security CVE debrief

CVE-2026-10813 LMCache CVE debrief

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.

Vendor
LMCache
Product
LMCache
CVSS
LOW 1.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-22
Advisory published
2026-06-04
Advisory updated
2026-07-22

Who should care

Users of LMCache up to version 0.4.6 should be aware of this vulnerability and consider updating to a fixed version once available.

Technical summary

The vulnerability is located in the hex_hash_to_int16 function within the lmcache/integration/vllm/utils.py file of the LMCache component KV Cache Handler. This weakness allows for the use of weak hashes, potentially leading to security issues. The Common Vulnerabilities and Exposures (CVE) score for this issue is 1.1, indicating a low severity.

Defensive priority

Low

Recommended defensive actions

  • Consider updating LMCache to a version beyond 0.4.6 once a patch is released.
  • Review and apply the pull request at [ref-6] to fix the issue.
  • Monitor the official LMCache repository [ref-4] for updates.

Evidence notes

Evidence for this CVE includes references to the LMCache GitHub repository [ref-4], issue tracker [ref-5], and a pull request addressing the issue [ref-6]. Additional information can be found on Vuldb [ref-7].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-10813 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-10813

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-10813 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-10813

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.