CVE-2024-9052: vLLM deserialization vulnerability in vllm.distributed.GroupCoordinator.recv_object

Should you act?

Critical and remotely reachable

No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• No confirmed exploitation. It is not in CISA’s KEV catalog. That can change quickly after a public write-up; re-check if you are affected.
• Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
• Only applies if your dependency tree includes vllm (PyPI) <= 0.8.1, no fixed version listed. Check your lockfile, including transitive dependencies.

What it is

From the GitHub advisory

vllm-project vllm version 0.6.0 contains a vulnerability in the distributed training API. The function vllm.distributed.GroupCoordinator.recvobject() deserializes received object bytes using pickle.loads() without sanitization, leading to a remote code execution vulnerability.

Maintainer perspective Note that vLLM does NOT use the code as described in the report on huntr. The problem only exists if you use these internal APIs in a way that exposes them to a network as described. The vllm team was not involved in the analysis of this report and the decision to assign it a CVE.

Weakness type: CWE-502.

Product: vllm (PyPI) · Assigned by: @huntr_ai · Published: 2025-03-20

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: none (no login)
• User interaction: none
• Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).

Timeline

• 2025-03-20 — CVE record published by @huntr_ai
• 2025-03-20 — GitHub-reviewed advisory GHSA-pgr7-mhp5-fgjp published (critical)
• 2025-04-10 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vulnerability records

1. GitHub Advisory GHSA-pgr7-mhp5-fgjp github.com
2. CVE.org record CVE-2024-9052 cve.org
3. NVD entry CVE-2024-9052 nvd.nist.gov

Other references from the CVE record and advisory

1. huntr.com huntr.com
2. github.com github.com
3. github.com github.com
4. github.com github.com

Critical PyPI advisories · Today’s Security Digest