Medium
shiro — security advisory
Default configurations of Apache Shiro have a session fixation vulnerability. 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, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID.
- Products
- shiro
- Affected versions
- 1.2.4-1, 1.2.4-1ubuntu0.1~esm1, 1.2.4-1ubuntu0.1~esm2, 1.3.2-2, 1.3.2-3ubuntu0.18.04.1~esm1, 1.3.2-3~18.04, 1.3.2-3~18.04.1, 1.3.2-4, 1.3.2-4ubuntu0.1, 1.3.2-4ubuntu0.2, 1.3.2-5, 1.3.2-5ubuntu0.24.04.1~esm1, 1.3.2-6ubuntu1, 1.3.2-6ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2026-43827
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:04 UTC · Revision 1
Source evidence
Default configurations of Apache Shiro have a session fixation vulnerability. 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, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID.
osv:UBUNTU-CVE-2026-43827
shiro
Fixed versions: Not specified
shiro
Fixed versions: Not specified
shiro
Fixed versions: Not specified
shiro
Fixed versions: Not specified
shiro
Fixed versions: Not specified
shiro
Fixed versions: Not specified
shiro
Fixed versions: Not specified
shiro
Fixed versions: Not specified
Complete source record
{
"id": "71e85a6b7dd7e7cb90584765331f40c9b49379ff63468238b4b568b0336b4ab8",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-43827",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-43827",
"summary": "Default configurations of Apache Shiro have a session fixation vulnerability. 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, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID.",
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"severity": "medium",
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"aliases": [
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"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y/R:U/RE:L/U:Amber"
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"modified": "2026-10-17T13:00:06.694359470Z",
"provider": "osv",
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"references": [
"https://ubuntu.com/security/CVE-2026-43827",
"https://www.cve.org/CVERecord?id=CVE-2026-43827",
"https://www.openwall.com/lists/oss-security/2026/05/25/6",
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"source_id": "core-osv",
"document_id": 360319,
"published_at": "2026-05-25T21:16:00+00:00"
}