CVE-2026-42273 Heimdall: Case-sensitive host matching may lead to policy bypass

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall performs host matching in a case-sensitive manner, while HTTP hostnames are case-insensitive. This discrepancy can result in heimdall failing to match a rule for a request host...

CVE-2026-42272

CVE-2026-42272 affects Heimdall, a cloud-native Identity Aware Proxy/Access Control service. Before v0.17.14, it treated URL-encoded slashes (%2F) as case-sensitive while percent-encodings must be case-insensitive, causing %2f to be ignored when allow_encoded_slashes is off (default). This discre...

CVE-2026-42272

Heimdall is a cloud native Identity Aware Proxy and Access Control Decision service. Prior to version 0.17.14, Heimdall handles URL-encoded slashes %2F in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent %2f is not recognized...

Heimdall 安全漏洞

Heimdall is an open-source identity recognition proxy and access control decision-making service developed by dadrus for cloud-native applications. Versions of Heimdall prior to 0.17.14 contained security vulnerabilities. These vulnerabilities stemmed from the use of hostname matching in a...

Heimdall 安全漏洞

Heimdall is an open-source application panel and launcher developed by LinuxServer.io. Versions of Heimdall prior to 0.17.14 contained security vulnerabilities. These vulnerabilities stemmed from the handling of URL-encoded slashes in a case-sensitive manner. URL-encoded slashes are defined as...

Fixed in Apache Tomcat 11.0.22

Moderate: Security constraints not correctly applied CVE-2026-43515 When multiple security constraints defined an HTTP method constraint for the same extension pattern, only the first method constraint was applied. This was fixed with commits 276087d9 and 06597486. This issue was reported to the...

Remote Code Execution (RCE)

Apache Camel is vulnerable to Remote Code Execution. The vulnerability is due to inconsistent case-sensitive header filtering in non-HTTP HeaderFilterStrategy implementations, which allows an attacker to inject malicious headers that are later interpreted by downstream components to execute...

CVE-2026-3833 Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison

A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of nameConstraints labels, specifically for dNSName DNS or rfc822Name email constraints within excludedSubtrees or permittedSubtrees. A remote attacker can exploit this by crafting a leaf...

CVE-2026-3833 Gnutls: gnutls: policy bypass due to case-sensitive nameconstraints comparison

A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of nameConstraints labels, specifically for dNSName DNS or rfc822Name email constraints within excludedSubtrees or permittedSubtrees. A remote attacker can exploit this by crafting a leaf...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity in the enforcement of X.509 nameConstraints due to case-sensitive comparisons for dNSName and the domain portion of rfc822Name. An attacker can gain unauthorized certificate validation and potential...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity due to a flaw in the default filtering mechanism HeaderFilterStrategy that only blocks headers starting with specific prefixes. An attacker can execute arbitrary code and write files by injecting...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity due to a flaw in the default filtering mechanism HeaderFilterStrategy that only blocks headers starting with specific prefixes. An attacker can execute arbitrary code and write files by injecting...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity due to a flaw in the default filtering mechanism HeaderFilterStrategy that only blocks headers starting with specific prefixes. An attacker can execute arbitrary code and write files by injecting...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity due to a flaw in the default filtering mechanism HeaderFilterStrategy that only blocks headers starting with specific prefixes. An attacker can execute arbitrary code and write files by injecting...

CVE-2026-40453 Apache Camel JMS, Apache Camel CoAP, Apache Camel Google PubSub: Incomplete fix for CVE-2025-27636 in non-HTTP HeaderFilterStrategies (camel-jms, camel-sjms, camel-coap, camel-google-pubsub) allows case-variant header injection

The fix for CVE-2025-27636 added setLowerCasetrue to HttpHeaderFilterStrategy so that case-variant header names such as 'CAmelExecCommandExecutable' are filtered out alongside 'CamelExecCommandExecutable'. The same setLowerCasetrue call was not applied to five non-HTTP HeaderFilterStrategy...

Heimdall: Case-sensitive host matching may lead to policy bypass

Summary Heimdall performs host matching in a case-sensitive manner, while HTTP hostnames are case-insensitive. This discrepancy can result in heimdall failing to match a rule for a request host that differs only in letter casing, potentially causing the request to be classified differently than...

Interpretation Conflict

Overview Affected versions of this package are vulnerable to Interpretation Conflict due to case-sensitive handling of the host matching process. An attacker can bypass access control policies by sending requests with hostnames that differ only in letter casing, potentially gaining unauthorized...

Heimdall: Case-sensitive handling of URL-encoded slashes may lead to inconsistent path interpretation

Summary Heimdall handles URL-encoded slashes %2F in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent %2f is not recognized and therefore not processed as expected when allowencodedslashes is set to off the default setting. Th...

GHSA-43JV-5J4X-QV67 Heimdall: Case-sensitive handling of URL-encoded slashes may lead to inconsistent path interpretation

Summary Heimdall handles URL-encoded slashes %2F in a case-sensitive manner, while percent-encoding is defined to be case-insensitive. As a result, the lowercase equivalent %2f is not recognized and therefore not processed as expected when allowencodedslashes is set to off the default setting. Th...

PT-2026-37187

Name of the Vulnerable Software and Affected Versions Heimdall versions prior to 0.17.14 Description Heimdall performs host matching in a case-sensitive manner, which conflicts with the case-insensitive nature of HTTP hostnames. This discrepancy allows a request host that differs only in letter...