vulnerability
Atlassian Bitbucket: CVE-2025-52999: DoS (Denial of Service) com.fasterxml.jackson.core:jackson-core Dependency in Bitbucket Data Center and Server
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 8 | (AV:N/AC:L/Au:N/C:N/I:N/A:C) | Jan 20, 2026 | Jan 21, 2026 | Jan 21, 2026 |
Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
Jan 20, 2026
Added
Jan 21, 2026
Modified
Jan 21, 2026
Description
This High severity DoS (Denial of Service) vulnerability was introduced in version 8.19.0 and 9.4.0 of Bitbucket Data Center and Server.
This DoS (Denial of Service) vulnerability, with a CVSS Score of 8.7, allows an attacker to perform actions to degrade service, which has no impact to confidentiality, no impact to integrity, and high impact to availability.
Atlassian recommends that Bitbucket 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:
* Bitbucket Data Center 9.4: Upgrade to a release greater than or equal to 9.4.15
* Bitbucket Data Center 8.19: Upgrade to a release greater than or equal to 8.19.26
See the release notes (https://confluence.atlassian.com/bitbucketserver/release-notes). You can download the latest version of Bitbucket Data Center from the download center (https://www.atlassian.com/software/bitbucket/download-archives).
This DoS (Denial of Service) vulnerability, with a CVSS Score of 8.7, allows an attacker to perform actions to degrade service, which has no impact to confidentiality, no impact to integrity, and high impact to availability.
Atlassian recommends that Bitbucket 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:
* Bitbucket Data Center 9.4: Upgrade to a release greater than or equal to 9.4.15
* Bitbucket Data Center 8.19: Upgrade to a release greater than or equal to 8.19.26
See the release notes (https://confluence.atlassian.com/bitbucketserver/release-notes). You can download the latest version of Bitbucket Data Center from the download center (https://www.atlassian.com/software/bitbucket/download-archives).
Solution
atlassian-bitbucket-upgrade-latest
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