Vulnerability-Lookup

CVE-2026-43827 (GCVE-0-2026-43827)

Vulnerability from cvelistv5 – Published: 2026-05-25 20:19 – Updated: 2026-05-26 12:39

Title

Apache Shiro: Session fixation: new session is not created after login by default

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.

Severity

5.9 (Medium)


                        
                          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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-384 - Session Fixation

Assigner

apache

References

2 references

URL	Tags
https://shiro.apache.org/security-reports.html#cv…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/05/25/6

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Shiro	Affected: 1.0 , ≤ 2.1.0 (semver) Affected: 3.0.0-alpha-0 , ≤ 3.0.0-alpha-1 (semver)

Credits

Rasmus Moorats <xx@nns.ee> Lenny Primak <lenny@flowlogix.com>

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-43827

Vulnerability from fkie_nvd - Published: 2026-05-25 21:16 - Updated: 2026-06-17 10:49

Severity

6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security@apache.org	https://shiro.apache.org/security-reports.html#cve_2026_43827	Vendor Advisory
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/05/25/6	Mailing List, Third Party Advisory

Impacted products

	Vendor	Product	Version
	apache	shiro	*
	apache	shiro	3.0.0

JSON

To clipboard

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          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "NONE",
          "userInteraction": "ACTIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:L/U:Amber",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "LOW"
        },
        "source": "security@apache.org",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-43827",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-26T12:39:33.503346Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-25T21:16:34.700",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://shiro.apache.org/security-reports.html#cve_2026_43827"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2026/05/25/6"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-384"
        }
      ],
      "source": "security@apache.org",
      "type": "Secondary"
    }
  ]
}

GHSA-FCVM-3CPJ-F9QX

Vulnerability from github – Published: 2026-05-26 13:30 – Updated: 2026-06-30 17:26

Summary

Apache Shiro has a session fixation vulnerability

Details

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.

Severity

5.9 (Medium)


                  
                    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/RE:L/U:Amber

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.shiro:shiro-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.0.0-incubating"
            },
            {
              "fixed": "2.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.apache.shiro:shiro-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0.0-alpha-1"
            },
            {
              "fixed": "3.0.0-alpha-2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "3.0.0-alpha-1"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-43827"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-384"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-30T17:26:23Z",
    "nvd_published_at": "2026-05-25T21:16:34Z",
    "severity": "MODERATE"
  },
  "details": "Default configurations of Apache Shiro have a session fixation vulnerability.\n\nThis issue affects Apache Shiro from 1.0 to 2.1.0, and 3.0.0-alpha-1.\n\nUsers are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue.\n\nIn 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.",
  "id": "GHSA-fcvm-3cpj-f9qx",
  "modified": "2026-06-30T17:26:23Z",
  "published": "2026-05-26T13:30:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43827"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apache/shiro"
    },
    {
      "type": "WEB",
      "url": "https://shiro.apache.org/security-reports.html#cve_2026_43827"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/25/6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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/RE:L/U:Amber",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Apache Shiro has a session fixation vulnerability"
}

ubuntu-cve-2026-43827

Vulnerability from osv_ubuntu

Published

2026-05-25 21:16

Modified

2026-05-29 17:49

Summary

Details

Severity

5.9 (Medium)


                    
                      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

6.5 (Medium)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-43827	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-43827	REPORT
	https://www.openwall.com/lists/oss-security/2026/…	REPORT
	https://shiro.apache.org/security-reports.html#cv…	REPORT
	http://www.openwall.com/lists/oss-security/2026/05/25/6	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libshiro-java",
            "binary_version": "1.2.4-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "shiro",
        "purl": "pkg:deb/ubuntu/shiro@1.2.4-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.4-1",
        "1.2.4-1ubuntu0.1~esm1",
        "1.2.4-1ubuntu0.1~esm2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libshiro-java",
            "binary_version": "1.3.2-3ubuntu0.18.04.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "shiro",
        "purl": "pkg:deb/ubuntu/shiro@1.3.2-3ubuntu0.18.04.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.2-2",
        "1.3.2-3~18.04",
        "1.3.2-3~18.04.1",
        "1.3.2-3ubuntu0.18.04.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libshiro-java",
            "binary_version": "1.3.2-4ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "shiro",
        "purl": "pkg:deb/ubuntu/shiro@1.3.2-4ubuntu0.2?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.2-4",
        "1.3.2-4ubuntu0.1",
        "1.3.2-4ubuntu0.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libshiro-java",
            "binary_version": "1.3.2-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "shiro",
        "purl": "pkg:deb/ubuntu/shiro@1.3.2-5?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.2-4",
        "1.3.2-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libshiro-java",
            "binary_version": "1.3.2-5ubuntu0.24.04.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "shiro",
        "purl": "pkg:deb/ubuntu/shiro@1.3.2-5ubuntu0.24.04.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.2-5",
        "1.3.2-5ubuntu0.24.04.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libshiro-java",
            "binary_version": "1.3.2-6ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "shiro",
        "purl": "pkg:deb/ubuntu/shiro@1.3.2-6ubuntu1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.2-6ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libshiro-java",
            "binary_version": "1.3.2-6ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "shiro",
        "purl": "pkg:deb/ubuntu/shiro@1.3.2-6ubuntu2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.2-6ubuntu1",
        "1.3.2-6ubuntu2"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-43827",
  "modified": "2026-05-29T17:49:35Z",
  "published": "2026-05-25T21:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-43827"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43827"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2026/05/25/6"
    },
    {
      "type": "REPORT",
      "url": "https://shiro.apache.org/security-reports.html#cve_2026_43827"
    },
    {
      "type": "REPORT",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/25/6"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-43827"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-43827 (GCVE-0-2026-43827)

FKIE_CVE-2026-43827

GHSA-FCVM-3CPJ-F9QX

ubuntu-cve-2026-43827

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature