Jenkins <2.567 & LTS <2.555.2: Redirect Path Spoofing Enables Phishing
CVE-2026-53436 Published on June 10, 2026
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 relative path segments (`./` or `../`), allowing attackers to perform phishing attacks.
Vulnerability Analysis
CVE-2026-53436 is exploitable with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
What is an Open Redirect Vulnerability?
A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. An http parameter may contain a URL value and could cause the web application to redirect the request to the specified URL. By modifying the URL value to a malicious site, an attacker may successfully launch a phishing scam and steal user credentials. Because the server name in the modified link is identical to the original site, phishing attempts have a more trustworthy appearance.
CVE-2026-53436 has been classified to as an Open Redirect vulnerability or weakness.
Products Associated with CVE-2026-53436
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Affected Versions
Jenkins Project Jenkins:- Version 2.568 and below * is unaffected.
- Version 2.555.3 and below 2.555.* is unaffected.