CVE-2026-43828 Apache Shiro: Shiro's native session and rememberMe cookies do not have secure flag set by default

What is CVE-2026-43828?

CVE-2026-43828 is a medium-severity vulnerability in Apache Shiro, published on 25 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Default configurations of Apache Shiro send sensitive cookies in HTTPS session without 'Secure' attribute.

This issue affects Apache Shiro from 1.0 to 2.1.0, and 3.0.0-alpha-1.

Users are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue.

In the affected versions, Shiro-native session manager, as well as Remember-Me manager sends JSESSIONID and rememberMe cookies without 'secure' attribute by default.

Weakness: CWE-614

Which versions are affected by CVE-2026-43828?

4 open source packages ship an affected version, including org.apache.shiro:shiro-web. It affects 1 product.

Products include Apache Shiro.

How do I fix CVE-2026-43828?

Upgrade org.apache.shiro:shiro-web to a fixed version for your release line: 2.2.0 or 3.0.0-alpha-2.

Is CVE-2026-43828 being exploited?

There is no known exploitation of CVE-2026-43828 in the wild and no public exploit code.

Other vulnerabilities in Apache Shiro

• CVE-2023-34478 Path Traversal in Apache Shiro Critical 9.8
• CVE-2022-40664 Authentication Bypass Vulnerability in Shiro when forwarding or including via RequestDispatcher Critical 9.8
• CVE-2022-32532 Authentication Bypass Vulnerability Critical 9.8
• CVE-2021-41303 Apache Shiro vulnerable to a specially crafted HTTP request causing an authentication bypass Critical 9.8
• CVE-2020-17523 Authentication bypass in Apache Shiro Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2026-JV78946, DEBIAN-CVE-2026-43828, GHSA-c6r4-qjmw-cvj2, MINI-8w8x-wr77-cqx8, MINI-jwjv-r533-j26c, UBUNTU-CVE-2026-43828.