Phishing via normalized post-login redirect
Published Jun 10, 2026 · Updated Jun 10, 2026
Open redirect in Jenkins 2.567 and earlier and LTS 2.555.2 and earlier allows remote attackers to redirect users after login. The default login flow validates a URL containing ./ or ../ before the servlet container collapses those segments into a // scheme-relative URL. A victim must follow a crafted Jenkins link and complete the login flow; the resulting redirect reaches an attacker-controlled domain and enables phishing.
Summary
What happened
Open redirect in Jenkins 2.567 and earlier and LTS 2.555.2 and earlier allows remote attackers to redirect users after login. The default login flow validates a URL containing ./ or ../ before the servlet container collapses those segments into a // scheme-relative URL. A victim must follow a crafted Jenkins link and complete the login flow; the resulting redirect reaches an attacker-controlled domain and enables phishing.
The record
- CVE
- CVE-2026-53436
- Published
- Jun 10, 2026
- Updated
- Jun 10, 2026
- Vendor
- Jenkins Project
- Product
- Jenkins
- Classifications
- CWE-601, T1566.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 10, 2026CVE publishedPublication date reported by the CVE source.
- Jun 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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