Jenkins is widely used enterprise CI/CD; flaw allows impersonation and permission gain that can impact build pipelines and access across organizations.
CVE-2026-70429
Jenkins case-insensitive user/group handling allows impersonation and unauthorized permission grants.
Is CVE-2026-70429 being exploited?
Not confirmed. CVE-2026-70429 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.24% probability of exploitation in the next 30 days.
How severe is CVE-2026-70429?
CVE-2026-70429 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-70429?
Yes. A fix has been recorded for CVE-2026-70429. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-70429 affect?
CVE-2026-70429 affects Jenkins ≤ 2.575, Jenkins LTS ≤ 2.568.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-70429?
Upgrade Jenkins to versions >2.575 (or LTS >2.568.1) and restrict/audit user/group creation.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attackers can create users/groups that case-insensitively match others to impersonate accounts and gain their permissions, enabling privilege escalation and unauthorized access.
Immediate action required