CVE-2026-55514

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 71% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 4 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

vLLM is a library for LLM inference and serving. From 0.12.0 to before 0.24.0, sending a pure prompt embeds payload in a /v1/completions request with a model using M-RoPE causes EngineCore to fail an assertion and fatally crash, shutting down the entire server application. Any remote user who is authorized to make a /v1/completions request can make such a request and induce a crash. This issue is fixed in version 0.24.0.

CVSS v3
6.5
EG Score
6.5(medium)
EPSS
29.1%
KEV
Not listed

Published

July 6, 2026

Last Modified

July 7, 2026

Advisory Details (4)

Auto-updated Jul 7, 2026
Patch available. Sources: github_release, github, github_commit, github_pr.
github Patch Available

DoS caused by sending `/v1/completions` with prompt embeds payload with models that use M-RoPE · Advisory · vllm-project/vllm · GitHub

https://github.com/vllm-project/vllm/security/advisories/GHSA-33cg-gxv8-3p8g
github_release Patch Available

v0.24.0

Patch available: vllm-project/vllm v0.24.0

https://github.com/vllm-project/vllm/releases/tag/v0.24.0
github_pr

[Security] Fix DoS via prompt_embeds on M-RoPE models

Fix merged in vllm-project/vllm PR #45252 on 2026-06-13 — awaiting tagged release

https://github.com/vllm-project/vllm/pull/45252
github_commit

commit 470229c37efa (vllm-project/vllm)

Fix landed in vllm-project/vllm commit 470229c37efa — awaiting tagged release

https://github.com/vllm-project/vllm/commit/470229c37efaf69c86e8bc97482b0b1ff7551c65

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 23:52 UTCEG score recompute
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-10 23:20 UTCEG score recompute
  6. 2026-07-09 22:48 UTCEG score recompute
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-08 22:16 UTCEG score recompute
  10. 2026-07-08 15:16 UTCEPSS rescore
  11. 2026-07-08 15:16 UTCEPSS rescore
  12. 2026-07-07 21:43 UTCEG score recompute▼ 0.60
  13. 2026-07-07 20:14 UTCNVD updateCVSS v3 → 6.5 · severity → MEDIUM
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-07 13:46 UTCEPSS rescore
  16. 2026-07-07 09:06 UTCEG score recompute
  17. 2026-07-06 20:30 UTCEG score recompute
  18. 2026-07-06 20:29 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-55514?
CVE-2026-55514 is a medium vulnerability published on July 6, 2026. vLLM is a library for LLM inference and serving. From 0.12.0 to before 0.24.0, sending a pure prompt embeds payload in a /v1/completions request with a model using M-RoPE causes EngineCore to fail an assertion and fatally crash, shutting down the entire server application. Any remote user who is…
When was CVE-2026-55514 disclosed?
CVE-2026-55514 was first published in the National Vulnerability Database on July 6, 2026, with the most recent update on July 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55514 actively exploited?
CVE-2026-55514 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55514?
CVE-2026-55514 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-55514?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55514, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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