High severity · published Sep 2, 2026
CVE-2026-84648
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer does not escape log record metadata (source, level, and timestamp) resulting in a stored cross-site…
8.8
CVSS
0.6%
EPSS
No
On KEV
Description
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, the system log viewer does not escape log record metadata (source, level, and timestamp) resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers in control of agent processes.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JE
Jenkins · Jenkins
before 2.568.3; before 2.580 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84648
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84648
Vendor Advisory
https://www.jenkins.io/security/advisory/2026-09-02/#SECURITY-3967
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