Common Weakness Enumeration
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CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
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.
CVE-2026-8646 (GCVE-0-2026-8646)
Vulnerability from cvelistv5 – Published: 2026-06-22 14:44 – Updated: 2026-06-24 03:56
VLAI
Title
IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities
Summary
IBM WebSphere Application Server 9.0 and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ibm.com/support/pages/node/7276579 | vendor-advisorypatch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| IBM | WebSphere Application Server |
Affected:
9.0.0 , ≤ 7.0.2 Interim Fix 035
(semver)
Affected: 8.5.0 , ≤ 7.0.3 Interim Fix 017 (semver) cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:* cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:* cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:* |
|
| IBM | WebSphere Application Server - Liberty |
Affected:
17.0.0.3 , ≤ 26.0.0.6
(semver)
cpe:2.3:a:ibm:websphere_application_server___liberty:17.0.0.3:*:*:*:*:*:*:* cpe:2.3:a:ibm:websphere_application_server___liberty:26.0.0.6:*:*:*:*:*:*:* |
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Mitigation
Phase: Implementation
Description:
- Use a web server that employs a strict HTTP parsing procedure, such as Apache [REF-433].
Mitigation
Phase: Implementation
Description:
- Use only SSL communication.
Mitigation
Phase: Implementation
Description:
- Terminate the client session after each request.
Mitigation
Phase: System Configuration
Description:
- Turn all pages to non-cacheable.
CAPEC-273: HTTP Response Smuggling
['An adversary manipulates and injects malicious content in the form of secret unauthorized HTTP responses, into a single HTTP response from a vulnerable or compromised back-end HTTP agent (e.g., server).', 'See CanPrecede relationships for possible consequences.']
CAPEC-33: HTTP Request Smuggling
['An adversary abuses the flexibility and discrepancies in the parsing and interpretation of HTTP Request messages using various HTTP headers, request-line and body parameters as well as message sizes (denoted by the end of message signaled by a given HTTP header) by different intermediary HTTP agents (e.g., load balancer, reverse proxy, web caching proxies, application firewalls, etc.) to secretly send unauthorized and malicious HTTP requests to a back-end HTTP agent (e.g., web server).', 'See CanPrecede relationships for possible consequences.']