CVE-2026-59901

This DoS (Denial of Service) vulnerability was introduced in versions 9.12.1, 10.0.0, 10.1.1, 10.2.0, 10.3.0, 10.4.0, 10.5.0, 10.6.0, 10.7.1, 11.0.0, 11.1.0, 11.2.0, and 11.3.0 of Jira Software 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 allows an unauthenticated attacker to consume system resources, which has no impact to confidentiality, no impact to integrity, high impact to availability, and requires no user interaction. Atlassian recommends that Jira Software 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: * Jira Software Data Center 11.3: Upgrade to a release greater than or equal to 11.3.10 * Jira Software Data Center 10.3: Upgrade to a release greater than or equal to 10.3.24 * Jira Software Data Center 9.12: Upgrade to a release greater than or equal to 9.12.38 See the release notes ([https://www.atlassian.com/software/jira/download-archives]). You can download the latest version of Jira Software Data Center from the download center ([https://www.atlassian.com/software/jira/download-archives]). The National Vulnerability Database provides the following description for this vulnerability: Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, the `Bzip2Decoder` handler in Netty's compression codec pipeline is vulnerable to a denial-of-service attack through a malformed bzip2 stream that permanently captures the event-loop thread in an infinite loop. The vulnerability exists in the run-length encoding (RLE) state machine within [`Bzip2BlockDecompressor.read()`]. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

EPSS 0.26% · 18.0th percentile