Medium severity · published Jun 10, 2026
CVE-2026-53437
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…
4.3
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JE
Jenkins · Jenkins
before 2.555.3; before 2.568 · source: vendor, NVD
OD
OpenShift Developer Tools and Services 4.12 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.13 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.14 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.15 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.16 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.17 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.18 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.19 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.20 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.21 · Red Hat
All versions, or not specified · source: CISA
OD
OpenShift Developer Tools and Services 4.22 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53437
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53437
Vendor Advisory
https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:60239
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:60246
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:60247
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:60248
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:60249
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