Medium severity · published May 25, 2026
CVE-2026-43828
Apache Shiro: Shiro's native session and rememberMe cookies do not have secure flag set by default
6.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Apache Shiro · Apache Software Foundation
1.0 through 2.1.0; 3.0.0-alpha-0 through 3.0.0-alpha-1 · source: vendor
SH
Shiro · Apache
before 2.1.1; 3.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43828
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43828
Vendor Advisory
https://shiro.apache.org/security-reports.html#cve_2026_43828
Mailing List
http://www.openwall.com/lists/oss-security/2026/05/25/7
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