Page generated: 11 Nov 2026, 00:00 UTC
← Dashboard

CVE-2026-48710

Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, the HTTP `Host` request header was not validated before being used to reconstruct `request.url`. Because the routing algorithm relies on the raw HTTP path while `request.url` is rebuilt from the `Host` hea…

Read full description
Starlette is a lightweight ASGI framework/toolkit. Prior to version 1.0.1, the HTTP `Host` request header was not validated before being used to reconstruct `request.url`. Because the routing algorithm relies on the raw HTTP path while `request.url` is rebuilt from the `Host` header, a malformed header could make `request.url.path` differ from the path that was actually requested. Middleware and endpoints that apply security restrictions based on `request.url` (rather than the raw `scope` path) could therefore be bypassed. Users should upgrade to a version greater than or equal to version 1.0.1, which validates the `Host` header against the grammar of RFC 9112 §3.2 / RFC 3986 §3.2.2 when constructing `request.url` and falls back to `scope["server"]` for malformed values.
CVSS 6.5 (MEDIUM) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
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 6.5: +0.97
  • Fresh EPSS: 70.29%: +0.35

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

Sources: 14 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Recorded Future
Press · 13 Sep 2026, 07:00 · September 2026 CVE Landscape - Recorded Future
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
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
Microsoft
Press · 26 Aug 2026, 07:00 · When AI infrastructure becomes the target: Securing gateways and control points - Microsoft
Cyber Press
Press · 09 Jun 2026, 07:00 · LiteLLM RCE Vulnerability Exploited in the Wild to Run Commands - Cyber Press
See all 14 source documents
Help Net Security
Press · 09 Jun 2026, 07:00 · LiteLLM vulnerability under active attack, CISA warns (CVE-2026-42271) - Help Net Security
GBHackers News
Press · 09 Jun 2026, 07:00 · LiteLLM Vulnerability Allows Attackers to Execute Arbitrary Commands on Servers - GBHackers News
The Hacker News
Press · 09 Jun 2026, 07:00 · LiteLLM Flaw CVE-2026-42271 Exploited in the Wild, Chains to Unauthenticated RCE - The Hacker News
Rescana
Press · 09 Jun 2026, 07:00 · Active Exploitation Alert: CVE-2026-42271 and CVE-2026-48710—Unauthenticated RCE in LiteLLM AI Gateway via Starlette Host Header Bypass - Rescana
CCB Belgium
Press · 28 May 2026, 07:00 · Warning: Vulnerability in Starlette framework and related frameworks like FastAPI exposes millions of servers to authentication bypass, Patch Immediately! | CCB Belgium - CCB Belgium
CSO Online
Press · 27 May 2026, 07:00 · FastAPI-based AI tools exposed to authentication bypass by flaw in Starlette framework - CSO Online
SC Media
Press · 27 May 2026, 07:00 · High-severity Starlette vulnerability ‘BadHost’ could expose sensitive data - SC Media
Techzine Global
Press · 27 May 2026, 07:00 · Vulnerability in open-source component puts AI platforms at risk - Techzine Global
Ars Technica
Press · 26 May 2026, 07:00 · Millions of AI agents imperiled by critical vulnerability in open source package - Ars Technica

Score evolution

● Hype   ● Reality

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

First record: hype 0.0 · 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 6.5; EPSS 70.3%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 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 14:00:13.371876+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
26 May 2026, 07:00
Published
26 May 2026, 21:54
Added to the CISA KEV catalog
02 Sep 2026, 00:00
Latest press mention
13 Sep 2026, 07:00
Score calculated
05 Nov 2026, 14:00