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Vulnerability · Published Jun 10, 2026 · Assigned by jenkins

CVE-2026-53437

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 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.4%top 62.4% 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 improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains tab or newline characters between `//`, allowing attackers to perform phishing attacks.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.jenkins-ci.main:jenkins-core2.555.3GHSA-463r-5m89-4xfr
Mavenorg.jenkins-ci.main:jenkins-core2.568GHSA-463r-5m89-4xfr

Affected products (as reported)

VendorProductVersions
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