IBM WebSphere Application Server 8.5/9.0/17.0.0.3/26.0.0.7 request smuggling

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$5k-$25k0.00

Summaryinfo

A vulnerability was found in IBM WebSphere Application Server and WebSphere Application Server Liberty 8.5/9.0/17.0.0.3/26.0.0.7. It has been rated as problematic. Affected by this vulnerability is an unknown functionality. The manipulation leads to request smuggling. This vulnerability is traded as CVE-2026-15328. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in IBM WebSphere Application Server and WebSphere Application Server Liberty 8.5/9.0/17.0.0.3/26.0.0.7 and classified as problematic. This issue affects an unknown function. The manipulation with an unknown input leads to a request smuggling vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 is vulnerable to HTTP request smuggling.

It is possible to read the advisory at ibm.com. The identification of this vulnerability is CVE-2026-15328 since 07/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/29/2026).

The vulnerability scanner Nessus provides a plugin with the ID 330488 (IBM WebSphere Application Server 8.5.x < 8.5.5.31 / 9.x < 9.0.5.29 / Liberty 17.0.0.3 < 26.0.0.8 (7281625)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (330488). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
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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Nessus ID: 330488
Nessus Name: IBM WebSphere Application Server 8.5.x < 8.5.5.31 / 9.x < 9.0.5.29 / Liberty 17.0.0.3 < 26.0.0.8 (7281625)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

07/09/2026 CVE reserved
07/28/2026 +19 days Advisory disclosed
07/28/2026 +0 days VulDB entry created
07/29/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: ibm.com

Advisory: ibm.com
Status: Confirmed

CVE: CVE-2026-15328 (🔒)
GCVE (CVE): GCVE-0-2026-15328
GCVE (VulDB): GCVE-100-383999

Entryinfo

Created: 07/28/2026 22:51
Updated: 07/29/2026 15:42
Changes: 07/28/2026 22:51 (52), 07/29/2026 15:42 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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