SB2026071612 - Multiple vulnerabilities in IBM Sterling Secure Proxy
Published: July 16, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2026-2332)
CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
CVSSv4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to inject arbitrary HTTP requests.
The vulnerability exists due to inconsistent interpretation of HTTP requests in the chunked transfer encoding extension parser when parsing quoted strings in HTTP/1.1 chunked transfer encoding extension values. A remote attacker can send a specially crafted chunked HTTP request to inject arbitrary HTTP requests.
The issue occurs because CRLF sequences inside quoted strings are treated as chunk header terminators instead of parsing errors.
2) Sensitive Information in Resource Not Removed Before Reuse (CVE-ID: CVE-2026-5795)
CWE-ID: CWE-226 - Sensitive Information in Resource Not Removed Before Reuse
CVSSv4: 9.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to escalate privileges.
The vulnerability exists due to sensitive information in resource not removed before reuse in JaspiAuthenticator.java when handling certain error or incomplete authentication flows. A remote attacker can trigger a request sequence that leaves residual authentication metadata in ThreadLocal storage to escalate privileges.
A subsequent unprivileged request processed by the same worker thread may inherit residual security roles if a mandatory CallerPrincipalCallback is missing or an exception occurs after a GroupPrincipalCallback has been persisted.
3) Input validation error (CVE-ID: CVE-2025-11143)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to a differential parsing of URIs between different components of the application. A remote attacker can use such behavior to bypass implemented security restrictions.
4) Path traversal (CVE-ID: CVE-2026-33227)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote user to load unintended classpath resources.
The vulnerability exists due to path traversal in Stomp consumer creation and Web console message browsing when processing an authenticated user-supplied key value. A remote user can supply a crafted key value to load unintended classpath resources.
The issue occurs in two instances: when creating a Stomp consumer and when browsing messages in the Web console, and it could potentially be chained with another attack to lead to further exploit.
5) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-39304)
CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper handling of TLSv1.3 KeyUpdate messages in ActiveMQ NIO SSL transports when processing client-triggered TLSv1.3 handshake KeyUpdates. A remote attacker can rapidly trigger KeyUpdate messages to cause a denial of service.
Only TLSv1.3 is vulnerable to out-of-memory exhaustion; earlier TLS versions may cause a connection hang instead.
Remediation
Install update from vendor's website.