Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-53437

Severity CVSS v4.0:
Pending analysis
Type:
CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
Publication date:
10/06/2026
Last modified:
11/06/2026

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): None

Base Score 3.x
4.30
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:* 2.555.3 (excluding)
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* 2.568 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools