Apache APISIX 3.8.0/3.9.0 forward-auth Plugin request smuggling

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apache APISIX 3.8.0/3.9.0. This vulnerability affects unknown code of the component forward-auth Plugin. This manipulation causes request smuggling. This vulnerability is tracked as CVE-2024-32638. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apache APISIX 3.8.0/3.9.0. Affected by this vulnerability is an unknown functionality of the component forward-auth Plugin. The manipulation with an unknown input leads to a request smuggling vulnerability. The CWE definition for the vulnerability is CWE-444. The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in Apache APISIX when using `forward-auth` plugin.This issue affects Apache APISIX: from 3.8.0, 3.9.0. Users are recommended to upgrade to version 3.8.1, 3.9.1 or higher, which fixes the issue.

The advisory is shared at lists.apache.org. This vulnerability is known as CVE-2024-32638 since 04/16/2024. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/10/2025).

Upgrading to version 3.8.1 or 3.9.1 eliminates this vulnerability.

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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: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Request smuggling
CWE: CWE-444
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: APISIX 3.8.1/3.9.1

Timelineinfo

04/16/2024 🔍
05/02/2024 +16 days 🔍
05/02/2024 +0 days 🔍
07/10/2025 +434 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: lists.apache.org
Status: Confirmed

CVE: CVE-2024-32638 (🔍)
GCVE (CVE): GCVE-0-2024-32638
GCVE (VulDB): GCVE-100-262837

Entryinfo

Created: 05/02/2024 11:29
Updated: 07/10/2025 18:47
Changes: 05/02/2024 11:29 (53), 07/10/2025 18:47 (2)
Complete: 🔍
Cache ID: 216::103

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