CVE-2021-26086

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-26086
Affected versions of Atlassian Jira Server and Data Center allow remote attackers to read particular files via a path traversal vulnerability in the /WEB-INF/web.xml endpoint. The affected versions are before version 8.5.14, from version 8.6.0 before 8.13.6, and from version 8.14.0 before 8.16.1.

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

5.0 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References
Link Resource
http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html Exploit Third Party Advisory VDB Entry
https://jira.atlassian.com/browse/JRASERVER-72695 Issue Tracking Vendor Advisory
http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html Exploit Third Party Advisory VDB Entry
https://jira.atlassian.com/browse/JRASERVER-72695 Issue Tracking Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086 US Government Resource
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
History

24 Oct 2025, 13:38

Type Values Removed Values Added
References () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086 - () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086 - US Government Resource

22 Oct 2025, 00:17

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086 -

21 Oct 2025, 20:18

Type Values Removed Values Added
References
  • {'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}

21 Oct 2025, 19:18

Type Values Removed Values Added
References
  • () https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26086 -

21 Nov 2024, 05:55

Type Values Removed Values Added
References () http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html - Exploit, Third Party Advisory, VDB Entry () http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html - Exploit, Third Party Advisory, VDB Entry
References () https://jira.atlassian.com/browse/JRASERVER-72695 - Issue Tracking, Vendor Advisory () https://jira.atlassian.com/browse/JRASERVER-72695 - Issue Tracking, Vendor Advisory

30 Mar 2022, 13:13

Type Values Removed Values Added
References (MISC) http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html - (MISC) http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html - Exploit, Third Party Advisory, VDB Entry
CPE cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:*		 cpe:2.3:a:atlassian:jira_server:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira_data_center:*:*:*:*:*:*:*:*

05 Oct 2021, 17:15

Type Values Removed Values Added
References
  • (MISC) http://packetstormsecurity.com/files/164405/Atlassian-Jira-Server-Data-Center-8.4.0-File-Read.html -

30 Aug 2021, 11:05

Type Values Removed Values Added
References (MISC) https://jira.atlassian.com/browse/JRASERVER-72695 - (MISC) https://jira.atlassian.com/browse/JRASERVER-72695 - Issue Tracking, Vendor Advisory
CPE cpe:2.3:a:atlassian:data_center:*:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:jira:*:*:*:*:*:*:*:*
CWE CWE-22
CVSS v2 : unknown
v3 : unknown 		v2 : 5.0
v3 : 5.3

16 Aug 2021, 01:15

Type Values Removed Values Added
New CVE
Information

Published : 2021-08-16 01:15

Updated : 2025-10-24 13:38

NVD link : CVE-2021-26086

Mitre link : CVE-2021-26086

CVE.ORG link : CVE-2021-26086

JSON object : View

Products Affected

atlassian

  • jira_data_center
  • jira_server
CWE
CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')