CVE-2026-25479

MEDIUM
2026-02-09 [email protected] GHSA-93ph-p7v4-hwh4
6.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
PoC Detected
Feb 17, 2026 - 15:14 vuln.today
Public exploit code
Patch Released
Feb 17, 2026 - 15:14 nvd
Patch available
CVE Published
Feb 09, 2026 - 20:15 nvd
MEDIUM 6.5

Tags

Authentication Bypass Litestar

Description

Litestar is an Asynchronous Server Gateway Interface (ASGI) framework. Prior to 2.20.0, in litestar.middleware.allowed_hosts, allowlist entries are compiled into regex patterns in a way that allows regex metacharacters to retain special meaning (e.g., . matches any character). This enables a bypass where an attacker supplies a host that matches the regex but is not the intended literal hostname. This vulnerability is fixed in 2.20.0.

Analysis

Litestar versions before 2.20.0 improperly escape regex metacharacters in the allowed_hosts middleware, allowing attackers to bypass hostname validation by supplying hosts that match the compiled regex pattern but differ from intended literal hostnames. Public exploit code exists for this vulnerability. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

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Priority Score

53
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: +20

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CVE-2026-25479 vulnerability details – vuln.today
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