What’s Vulnerable › Vulnerabilities

CVE-2023-38493: Paths contain matrix variables bypass decorators

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-25 · updated 2026-06-17
• Weakness: CWE-863

Description

Armeria is a microservice framework Spring supports Matrix variables. When Spring integration is used, Armeria calls Spring controllers via `TomcatService` or `JettyService` with the path that may contain matrix variables. Prior to version 1.24.3, the Armeria decorators might not invoked because of the matrix variables. If an attacker sends a specially crafted request, the request may bypass the authorizer. Version 1.24.3 contains a patch for this issue.

Affected products

• line armeria: before 1.24.3 — fixed in 1.24.3

How to fix

Upgrade to a fixed version: line armeria 1.24.3. Check the vendor advisory for mitigations.

References

• https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-controller/ann-methods/matrix-variables.html
• https://github.com/line/armeria/commit/039db50bbfc88014ea8737fd1e1ddd6fd3fc4f07
• https://github.com/line/armeria/security/advisories/GHSA-wvp2-9ppw-337j
• https://docs.spring.io/spring-framework/reference/web/webmvc/mvc-controller/ann-methods/matrix-variables.html
• https://github.com/line/armeria/commit/039db50bbfc88014ea8737fd1e1ddd6fd3fc4f07
• https://github.com/line/armeria/security/advisories/GHSA-wvp2-9ppw-337j

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