Is CVE-2021-26086 actively exploited?

CVE-2021-26086 has no public evidence of in-the-wild exploitation as of 2025-10-24.

What is the CVSS score for CVE-2021-26086?

CVE-2021-26086 has a CVSS score of 5.3 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

How do I patch CVE-2021-26086?

Patch guidance is available from atlassian security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-26086.

CVE-2021-26086 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-26086?

6 products: atlassian jira data center, atlassian jira data center, atlassian jira data center, atlassian jira server, atlassian jira server, and 1 more.

Description

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none
Weaknesses: CWE-22 · Path Traversal CWE-22 · Path Traversal

Metadata

Primary Vendor: ATLASSIAN
Published: 8/16/2021
Last Modified: 10/24/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

atlassian : jira_data_centeratlassian : jira_data_centeratlassian : jira_data_centeratlassian : jira_serveratlassian : jira_serveratlassian : jira_server

Remediation Guidance

Executive Summary

View on NIST NVD