CVE-2022-26133

CVE-2022-26133 Information Description SharedSecretClusterAuthenticator in Atlassian Bitbucket Data Center versions 5.14.0 and later before 7.6.14, 7.7.0 and later prior to 7.17.6, 7.18.0 and later prior to 7.18.4, 7.19.0 and later prior to 7.19.4, and 7.20.0 allow a remote, unauthenticated...

CVE-2022-26133

CVE-2022-26133 Description Atlassian Bitbucket Data Center Deserialization Vulnerability CVE-2022-26133 Batch Verification and Exploitation Vulnerability Verification Batch python3 CVE-2022-26133.py -u http://192.168.110.136:7990 -f target.txt Exploitation Disclaimer: This tool is only used for...

DoS (Denial of Service) org.jsoup:jsoup Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.4.23, 10.2.6, and 10.4.2 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated...

DoS (Denial of Service) io.netty:netty-codec Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.4.0 and 10.2.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated attacker to...

DoS (Denial of Service) io.netty:netty-codec-http Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.4.0 and 10.2.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated attacker to...

DoS (Denial of Service) io.netty:netty-codec-http Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.4.0 and 10.2.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated attacker to...

DoS (Denial of Service) io.netty:netty-codec-http Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.4.0 and 10.2.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated attacker to...

DoS (Denial of Service) org.apache.httpcomponents.core5:httpcore5-h2 Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in version 10.2.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an unauthenticated attacker to expose asset...

DoS (Denial of Service) org.apache.tomcat.embed:tomcat-embed-core Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 9.4.0 and 10.2.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.3 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L allows an unauthenticated attacker to...

DoS (Denial of Service) org.bouncycastle:bc-fips, org.bouncycastle:bcprov-jdk18on Dependency in Bitbucket Data Center

This High severity DoS Denial of Service vulnerability was introduced in version 9.4.0 of Bitbucket Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 8.7 and a CVSS Vector of CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber allows an unauthenticate...

Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability

Multiple Atlassian products Bitbucket Data Center ,Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye contain a files or directories accessible to external parties vulnerability which could allow an...

⚡ Weekly Recap: Helpdesk 0-Days, Rogue Certs, ShinyHunters Arrest, AI-Fooling Malware and More

Some meetings last longer than it took attackers to jump on a newly disclosed security flaw this week. Within hours, they were already testing it. That's not much time to read the warning, let alone do something about it. But speed is only part of the problem. A secure connection didn't always me...

CVE-2026-21589: Critical unauthenticated arbitrary file access in Atlassian products

Overview On October 5, 2026, Atlassian published a security advisory for CVE-2026-21589, a critical arbitrary file access vulnerability affecting eight products: Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crow...

Atlassian Data Center Flaw Draws Exploitation Attempts Within Two Hours of Public Details

Threat actors have begun to exploit a newly disclosed critical security flaw impacting Atlassian Data Center products that could allow access to sensitive files under certain conditions. The arbitrary file access flaw, tracked as CVE-2026-21589 CVSS score: 9.3 affects multiple products, including...

VulnCheck KEV: CVE-2026-21589

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific fil...

Critical Atlassian Flaw Lets Unauthenticated Attackers Read Known Files Across 8 Products

A critical flaw in 8 Atlassian Data Center products, which customers host themselves, allows an attacker with no login access to read specific files in each product's web application root directory. The attacker must already know a file's exact name and path and cannot list what the directory...

EUVD-2026-92807

h3. Summary This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access...

CVE-2026-21589

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific fil...

CVE-2026-21589

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific fil...

CVE-2026-21589

This is a vulnerability in Bitbucket Data Center, Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center. Crowd Data Center, Crucible and Fisheye. This Arbitrary File Access vulnerability allows an unauthenticated attacker to access specific fil...