CVE-2026-100647

LOWCVSS 6.9 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

vLLM versions before 0.29.0 contain a denial-of-service vulnerability in the cache_salt parameter accepted on OpenAI-compatible and Anthropic API endpoints, which lacks maximum length validation and is processed on the single EngineCore scheduler thread. Unauthenticated attackers can send HTTP requests with multi-hundred-megabyte salt values that trigger expensive pickle serialization and SHA-256 hashing, stalling the scheduler thread and denying service to all concurrent requests.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-20

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-26: 109-26
Referenced assets1 URL
By indicator
Full discourse1 post
  • Kaitan ID Security@KaitanSecurity

    ⚠️ HIGH — CVE-2026-100647 vLLM versions before 0.29.0 contain a denial-of-service vulnerability in the cache_salt parameter accepted on OpenAI-co… CVSS 5.3 ⚡ Exploit in the wild Full analysis → https://sec.kaitan.id/cves/CVE-2026-100647 #OpenAI #CyberSecurity #InfoSec

    0000044
    90 followersView on X

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