Page generated: 11 Nov 2026, 03:45 UTC
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CVE-2026-59822

LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced …

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LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to use a fabricated Authorization header to trigger an OAuth2 passthrough fallback path that replaced failed LiteLLM key validation with an empty UserAPIKeyAuth() object, allowing requests to reach MCP tooling without a valid LiteLLM key. This issue is fixed in version 1.84.0.
CVSS 8.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
1.8/10
REALITY · THREAT PRIORITY
8.3/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 8.8: +1.32
  • Fresh EPSS: 0.84%: +0.00

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
60/100
Press, 30 days (60%)
5/100
Grounded branding (15%)
0/100
HYPE TOTAL18/100

Sources and documents

https://tech-insider.org/
Press · 14 Oct 2026, 07:00 · LiteLLM Gateway Flaws: 9.6% of Instances Exposed [2026] - https://tech-insider.org/
Forkast News
Press · 19 Sep 2026, 07:00 · The Relay Has No Lock: LiteLLM’s MCP Auth Bypass Marks a First for the CISA KEV Catalog - Forkast News
https://tech-insider.org/
Press · 10 Sep 2026, 07:00 · CISA Flags First MCP Flaw: LiteLLM CVE-2026-59822 - https://tech-insider.org/
The Hacker News
Press · 10 Sep 2026, 07:00 · Nearly 1 in 10 Exposed LiteLLM Gateways Accepted the Example "sk-1234" Admin Key - The Hacker News
wiz.io
Press · 09 Sep 2026, 07:00 · Off Guard: Breaking LiteLLM from authentication bypass to cloud compromise - wiz.io
See all 10 source documents
WION
Press · 08 Sep 2026, 07:00 · A flaw in a widely used AI proxy is now on the US list of actively exploited bugs - WION
The Hacker News
Press · 03 Sep 2026, 07:00 · CISA Adds Seven Exploited Flaws as Attackers Deploy Reverse Shells and Crypto Miners - The Hacker News
Forkast News
Press · 03 Sep 2026, 07:00 · Cisco Nexus 9000 Silicon One RCE Exposes AI Data Center Fabric to Root Compromise - Forkast News
Forkast News
Press · 02 Sep 2026, 07:00 · Three-of-Seven CISA KEV Additions Now Target AI Infrastructure - Forkast News
CyberSecurityNews
Press · 28 Aug 2026, 07:00 · Hackers Target AI Infrastructure With RCE, Prompt Injection and API Key Theft - CyberSecurityNews

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 1.8 · reality 8.3 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 8.8; EPSS 0.8%
Attention, last 30 days
1 distinct story titles; 1 press documents; 1 publisher domains.
Technical potential
network access, no prior privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 14:00:17.665024+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
08 Jul 2026, 19:32
First press mention
28 Aug 2026, 07:00
Added to the CISA KEV catalog
02 Sep 2026, 00:00
Latest press mention
14 Oct 2026, 07:00
Score calculated
05 Nov 2026, 14:00