Vulnerability · Published Jun 10, 2026 · Assigned by jenkins
CVE-2026-53440
Medium 4.3
In plain English
A medium-severity open redirect in Jenkins 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 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 88.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Jenkins 2.567 and earlier, LTS 2.555.2 and earlier does not ensure that the "from" parameter in the "Delegate to servlet container" security realm is safe to redirect to after login, allowing attackers to perform phishing attacks by redirecting users to an attacker-controlled domain.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.jenkins-ci.main:jenkins-core | 2.555.3 | GHSA-92m7-4fpw-2wxm |
| Maven | org.jenkins-ci.main:jenkins-core | 2.568 | GHSA-92m7-4fpw-2wxm |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Jenkins Project | Jenkins | see references |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
References
- Jenkins Security Advisory 2026-06-10 vendor-advisory