Vulnerability · Published Jun 24, 2026 · Assigned by jenkins

CVE-2026-57289

Medium 4.8

In plain English

A medium-severity improper certificate validation in Jenkins Bitbucket Push and Pull Request Plugin from Jenkins Project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.2%top 95.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Maven	io.jenkins.plugins:bitbucket-push-and-pull-request	3.3.9	GHSA-jwhr-h7pc-3974

Affected products (as reported)

Vendor	Product	Versions
Jenkins Project	Jenkins Bitbucket Push and Pull Request Plugin	0 – through 3.3.8

Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References

Jenkins Security Advisory 2026-06-24 vendor-advisory