CVE-2026-94622: vllm · Uncaught Exception
Affects vllmSource CVE Database V5
Not known to be exploited · CVSS 8.7 High.
Data as of 5 Nov 2026, 23:24 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 21 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| vllm-projectvllm | Affected
| Fixed in– |
GitHubvllm-project/vllmpkg:github/vllm-project/vllmOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, operators should monitor for malformed requests with incomplete kv_transfer_params and consider implementing request validation or filtering to prevent triggering the uncaught exception.
Description
vLLM versions up to 0.29.0 have a denial of service vulnerability caused by an uncaught KeyError in the NIXL connector's metadata handling. This occurs when requests contain incomplete kv_transfer_params dictionary entries, leading to termination of the decode engine and failure of all routed requests until manually restarted.
References
- github.com/vllm-project/vllm/pull/54807 (opens in a new tab)
- github.com/vllm-project/vllm/blob/v0.29.0/vllm/distributed/kv_transfer/kv_connector/v1/nixl/metadata.py (opens in a new tab)
- github.com/vllm-project/vllm (opens in a new tab)
- vulncheck.com/advisories/vllm-through-0.29.0-denial-of-service-via-incomplete-nixl-kv-transfer-metadata (opens in a new tab)