Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-21586

Quick assessment

Affected
Atlassian Confluence Data Center
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

以下是该漏洞描述的中文翻译： 这是一个高严重性的身份验证不当（Improper Authorization）漏洞，存在于 Confluence Data Center 的以下版本中：7.4.0、7.13.0、8.5.0、8.9.0、9.0.1、9.1.0、9.2.0、9.3.1、9.4.0、9.5.1、10.0.2、10.1.0 和 10.2.0。 该身份验证不当漏洞的 CVSS 评分为 7.1，允许经过身份验证的攻击者获取非预期的访问权限，可能导致资源或功能被非预期地暴露，从而使攻击者有可能获取敏感信息，甚至执行

CVSS 7.1 · High EPSS 0.32% · P26

Affected Version Matrix 13

VendorProduct Version RangeStatus
Atlassian Confluence Data Center 10.2.1 to 10.2.15 affected
10.1.0 to 10.1.2 affected
10.0.2 to 10.0.3 affected
9.5.1 to 9.5.4 affected
9.4.0 to 9.4.1 affected
9.3.1 to 9.3.2 affected
9.2.0 to 9.2.23 affected
9.1.1 affected
… +5 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-21586

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
This High severity Improper Authorization vulnerability was introduced in versions 7.4.0, 7.13.0, 8.5.0, 8.9.0, 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0, and 10.2.0 of Confluence Data Center. This Improper Authorization vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to gain unintended access and can lead to the exposure of resources or functionality, possibly providing attackers with sensitive information or even execute arbitrary code. Atlassian recommends that Confluence Data Center customers upgrade to latest version, if you are unable to do so, upgrade your instance to one of the specified supported fixed versions: Confluence Data Center 9.2: Upgrade to a release greater than or equal to 9.2.24 Confluence Data Center 10.2: Upgrade to a release greater than or equal to 10.2.17 See the release notes ([https://confluence.atlassian.com/doc/confluence-release-notes-327.html]). You can download the latest version of Confluence Data Center from the download center ([https://www.atlassian.com/software/confluence/download-archives]). This vulnerability was reported via our Penetration Testing program.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Atlassian Confluence Data Center 10.2.1 to 10.2.15 -

II. Public POCs for CVE-2026-21586

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-21586

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-21586 (2)

Same Patch Batch · Atlassian · 2026-09-15 · 3 CVEs total

CVE-2026-21588 7.1 HIGH CVE-2026-21588
CVE-2026-21587 7.1 HIGH CVE-2026-21587

IV. Related Vulnerabilities

Same product: Confluence Data Center
Same vendor: Atlassian

V. Comments for CVE-2026-21586

No comments yet

Leave a comment