CVE-2026-57289

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-24 · updated 2026-10-25
Weakness: CWE-295

Description

Jenkins Bitbucket Push and Pull Request Plugin 3.3.8 and earlier unconditionally disables SSL/TLS certificate and hostname validation for connections sending Bearer token authenticated requests to the configured Bitbucket Server endpoint, allowing attackers able to intercept network traffic to capture the token.

Affected products

Jenkins Project Jenkins Bitbucket Push and Pull Request Plugin: before 3.3.9 — fixed in 3.3.9

How to fix

Upgrade to a fixed version: Jenkins Project Jenkins Bitbucket Push and Pull Request Plugin 3.3.9. Check the vendor advisory for mitigations.

References

https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3856

Get alerted when CVE-2026-57289 or the next vulnerability affects your stack