CVE-2021-26086

MediumCVSS 5.3/10Known exploited (CISA KEV)Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-22

Affected software

Vendor	Product	Versions
Atlassian	Jira Server	>= unspecified, < 8.5.14; >= 8.6.0, < unspecified; >= unspecified, < 8.13.6; >= 8.14.0, < unspecified; >= unspecified, < 8.16.1
Atlassian	Jira Data Center	>= unspecified, < 8.5.14; >= 8.6.0, < unspecified; >= unspecified, < 8.13.6; >= 8.14.0, < unspecified; >= unspecified, < 8.16.1
atlassian	jira_server	< 8.5.14; >= 8.6.0, < 8.13.6; >= 8.14.0, < 8.16.1
atlassian	jira_server	< 8.5.14; >= 8.6.0, < 8.13.6; >= 8.14.0, < 8.16.1
atlassian	jira_server	< 8.5.14; >= 8.6.0, < 8.13.6; >= 8.14.0, < 8.16.1
atlassian	jira_data_center	< 8.5.14; >= 8.6.0, < 8.13.6; >= 8.14.0, < 8.16.1
atlassian	jira_data_center	< 8.5.14; >= 8.6.0, < 8.13.6; >= 8.14.0, < 8.16.1
atlassian	jira_data_center	< 8.5.14; >= 8.6.0, < 8.13.6; >= 8.14.0, < 8.16.1

References

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

Timeline

Published: Aug 16, 2021
Last modified: Jun 17, 2026
Added to CISA KEV: Nov 12, 2024
NVD status: Analyzed

Related CVEs from 2021

CVE-2021-260876.1An improper neutralization of input during web page generation in FortiWLC version 8.6.0, version 8.5.3 and below, version 8.4.8 and below, CVE-2021-260889.6An improper authentication vulnerability in FSSO Collector version 5.0.295 and below may allow an unauthenticated user to bypass a FSSO fire CVE-2021-260897.8An improper symlink following in FortiClient for Mac 6.4.3 and below may allow an non-privileged user to execute arbitrary privileged shell CVE-2021-260907.5A missing release of memory after its effective lifetime vulnerability in the Webmail of FortiMail 6.4.0 through 6.4.4 and 6.2.0 through 6.2 CVE-2021-260917.5A use of a cryptographically weak pseudo-random number generator vulnerability in the authenticator of the Identity Based Encryption service CVE-2021-260926.1Failure to sanitize input in the SSL VPN web portal of FortiOS 5.2.10 through 5.2.15, 5.4.0 through 5.4.13, 5.6.0 through 5.6.14, 6.0.0 thro CVE-2021-260936.5An access of uninitialized pointer (CWE-824) vulnerability in FortiWLC versions 8.6.0, 8.5.3 and earlier may allow a local and authenticated CVE-2021-260958.8The combination of various cryptographic issues in the session management of FortiMail 6.4.0 through 6.4.4 and 6.2.0 through 6.2.6, includin CVE-2021-260968.8Multiple instances of heap-based buffer overflow in the command shell of FortiSandbox before 4.0.0 may allow an authenticated attacker to ma CVE-2021-260978.8An improper neutralization of special elements used in an OS Command vulnerability in FortiSandbox 3.2.0 through 3.2.2, 3.1.0 through 3.1.4,CVE-2021-260987.5An instance of small space of random values in the RPC API of FortiSandbox before 4.0.0 may allow an attacker in possession of a few informa CVE-2021-260994.9Missing cryptographic steps in the Identity-Based Encryption service of FortiMail before 7.0.0 may allow an attacker who comes in possession