CVE-2025-48943: vllm-project vllm Uncaught Exception
Vulnerability summary
CVE-2025-48943 is a medium (CVSS 6.5) Uncaught Exception vulnerability in vllm-project vllm. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 40.6% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 0 · Related 2Timeline
- 30-05-2025PublishedVulnerability first disclosed.
- 30-05-2025Last modifiedVulnerability information updated.
Description
vLLM is an inference and serving engine for large language models (LLMs). Version 0.8.0 up to but excluding 0.9.0 have a Denial of Service (ReDoS) that causes the vLLM server to crash if an invalid regex was provided while using structured output. This vulnerability is similar to GHSA-6qc9-v4r8-22xg/CVE-2025-48942, but for regex instead of a JSON schema. Version 0.9.0 fixes the issue.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · PypiEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.49%
Chance of exploitation in the next 30 days
Percentile
41%
Versus all other CVEs
30-day change
+0.01 pp
From 0.47% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
PyPI1 product
- vllm< 08bf7840780980c7568c573c70a6a8db94fd45ff | ≥ 0.8.0, < 0.9.0
Vllm1 product
- vllm≥ 0.8.0, < 0.9.0
Vllm-project1 product
- vllm≥ 0.8.0, < 0.9.0
3 vendors · 3 products
References
7 links- github.com/vllm-project/vllm/security/advisories/GHSA-9hcf-v7m4-6m2jX Refsource CONFIRMWEBAdvisoryVendor Advisory
- github.com/vllm-project/vllm/commit/08bf7840780980c7568c573c70a6a8db94fd45ffX Refsource MISCWEBFIXPatch
- github.com/vllm-project/vllmPACKAGE