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CVE-2026-84656 is a missing authorization check in Jenkins 2.579 and earlier and Jenkins LTS 2.568.2 and earlier. An HTTP endpoint fails to enforce the required Item/Read permission for the specific job whose build parameters are requested. Consequently, a user with Item/Read permission on at least one Jenkins job can retrieve build parameter names and values for other jobs to which that user has no authorized access.
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No public exploit code observed for this vulnerability.
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6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Jenkins/Jenkins LTS vulnerability addressed through FreeBSD package security updates; the content provides no vulnerability-class or technical-impact detail.
An authorization flaw in Jenkins that enables an attacker holding Item/Read permission on one job to disclose build parameter names and values from other jobs for which they lack access.
Unknown; the vulnerability is referenced as affecting the identified Jenkins release range, but no technical description is provided.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.