CVE Program Container

Answer in brief

CVE-2021-26086 records a High severity vulnerability in CVE Program Container. The current sources mark it as known exploited. The current feed maps atlassian/jira_data_center (generic), Atlassian/Jira Data Center (generic), atlassian/jira_server (generic), Atlassian/Jira Server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 16, 2021Updated Oct 21, 2025Source checked Sep 20, 2026First seen by HOL May 24, 2026Material review Oct 21, 2025

Upstream Advisory

Key facts

Risk: High
Exploitation: Known exploited
Affected software: 4 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps atlassian/jira_data_center (generic), Atlassian/Jira Data Center (generic), atlassian/jira_server (generic), Atlassian/Jira Server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
atlassian/jira_data_centergeneric	>=0 <8.5.14 \|\| >=8.6.0 <8.13.6 \|\| >=8.14.0 <8.16.1	8.5.14, 8.13.6, 8.16.1
Atlassian/Jira Data Centergeneric	>=unspecified <8.5.14 \|\| >=8.6.0 <unspecified \|\| >=unspecified <8.13.6 \|\| >=8.14.0 <unspecified \|\| >=unspecified <8.16.1	8.5.14, unspecified, 8.13.6, 8.16.1
atlassian/jira_servergeneric	>=0 <8.5.14 \|\| >=8.6.0 <8.13.6 \|\| >=8.14.0 <8.16.1	8.5.14, 8.13.6, 8.16.1
Atlassian/Jira Servergeneric	>=unspecified <8.5.14 \|\| >=8.6.0 <unspecified \|\| >=unspecified <8.13.6 \|\| >=8.14.0 <unspecified \|\| >=unspecified <8.16.1	8.5.14, unspecified, 8.13.6, 8.16.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for atlassian/jira_data_center, Atlassian/Jira Data Center, atlassian/jira_server.
Review the reported fix. Update atlassian/jira_data_center to 8.5.14; Atlassian/Jira Data Center to 8.5.14; atlassian/jira_server to 8.5.14; Atlassian/Jira Server to 8.5.14 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 16, 2021
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 21, 2025
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
May 24, 2026
Added to CISA KEV
Nov 12, 2024
Evidence: source:kev:kev:kev:record

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.