CVE-2026-90555

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-12. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

vLLM versions before 0.28.0 fail to validate audio sample rate headers in the transcription endpoint, allowing authenticated clients to bypass duration checks. Attackers can submit forged FLAC headers with inflated sample rates to trigger excessive memory allocation and crash the API server process affecting all tenants.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 12, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Sep 12, 2026
Patch available. Sources: github.
generic

vLLM before 0.28.0 Denial of Service via Audio Header | Advisories | VulnCheck

https://www.vulncheck.com/advisories/vllm-before-0.28.0-denial-of-service-via-audio-header
github Patch Available

Speech-to-text audio decode duration limit bypass via forged header sample rate · Advisory · vllm-project/vllm · GitHub

https://github.com/vllm-project/vllm/security/advisories/GHSA-99f2-hwrc-gvq8

Vendor Advisories for CVE-2026-90555(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 26× 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. 2026-09-18 19:37 UTCEG score recompute
  2. 2026-09-18 19:37 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-17 19:36 UTCEG score recompute
  5. 2026-09-17 19:36 UTCGHSA enrichment
  6. 2026-09-17 19:32 UTCEPSS rescore
  7. 2026-09-16 17:51 UTCEG score recompute
  8. 2026-09-16 17:51 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 05:15 UTCEPSS rescore
  11. 2026-09-15 21:21 UTCEG score recompute
  12. 2026-09-15 21:21 UTCGHSA enrichment
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-14 21:17 UTCGHSA enrichment
  15. 2026-09-14 17:28 UTCEG score recompute
  16. 2026-09-14 17:28 UTCGHSA enrichment
  17. 2026-09-14 16:20 UTCEG score recompute
  18. 2026-09-14 16:20 UTCGHSA enrichment
  19. 2026-09-14 13:27 UTCEG score recompute
  20. 2026-09-14 13:27 UTCGHSA enrichment
  21. 2026-09-13 16:48 UTCEPSS rescore
  22. 2026-09-13 13:26 UTCEG score recompute
  23. 2026-09-13 13:26 UTCGHSA enrichment
  24. 2026-09-12 13:25 UTCEG score recompute
  25. 2026-09-12 12:19 UTCEG score recompute
Show 1 more
  1. 2026-09-12 12:18 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-90555?
CVE-2026-90555 is a medium vulnerability published on September 12, 2026. vLLM versions before 0.28.0 fail to validate audio sample rate headers in the transcription endpoint, allowing authenticated clients to bypass duration checks. Attackers can submit forged FLAC headers with inflated sample rates to trigger excessive memory allocation and crash the API server process…
When was CVE-2026-90555 disclosed?
CVE-2026-90555 was first published in the National Vulnerability Database on September 12, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90555 actively exploited?
CVE-2026-90555 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.8% of all scored CVEs.
What is the CVSS score of CVE-2026-90555?
CVE-2026-90555 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-90555?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90555, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-90555

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