litestar-org litestar up to 2.19.x litestar.middleware.allowed_hosts incorrect regex

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in litestar-org litestar up to 2.19.x. This issue affects the function litestar.middleware.allowed_hosts. The manipulation results in incorrect regex. This vulnerability is known as CVE-2026-25479. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in litestar-org litestar up to 2.19.x. It has been classified as critical. Affected is the function litestar.middleware.allowed_hosts. The manipulation with an unknown input leads to a incorrect regex vulnerability. CWE is classifying the issue as CWE-185. The product specifies a regular expression in a way that causes data to be improperly matched or compared. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-25479 since 02/02/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

Upgrading to version 2.20.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 06b36f481d1bfea6f19995cfb4f203aba45c4ace is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.9
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Incorrect regex
CWE: CWE-185 / CWE-697
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: litestar 2.20.0
Patch: 06b36f481d1bfea6f19995cfb4f203aba45c4ace

Timelineinfo

02/02/2026 CVE reserved
02/09/2026 +7 days Advisory disclosed
02/09/2026 +0 days VulDB entry created
02/18/2026 +9 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-93ph-p7v4-hwh4
Status: Confirmed

CVE: CVE-2026-25479 (🔒)
GCVE (CVE): GCVE-0-2026-25479
GCVE (VulDB): GCVE-100-345030

Entryinfo

Created: 02/09/2026 21:24
Updated: 02/18/2026 02:23
Changes: 02/09/2026 21:24 (67), 02/18/2026 02:23 (1)
Complete: 🔍
Cache ID: 216::103

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