Widely used CI platform; in-use plugin; could disrupt pipelines and expose Jenkins controller files.
CVE-2026-48920
Jenkins Email Extension Plugin allows file: inlining to read controller files.
Is CVE-2026-48920 being exploited?
Not confirmed. CVE-2026-48920 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 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-48920?
CVE-2026-48920 is rated High with a CVSS score of 8.8. 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-2026-48920?
Yes. A fix has been recorded for CVE-2026-48920. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48920 affect?
CVE-2026-48920 affects Jenkins Email Extension Plugin (versions <= 1933.v45cec755423f), Jenkins controller filesystem. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48920?
Update to patched plugin version; test; rotate exposed credentials if applicable.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Info disclosure: attacker can craft emails to inline file: URLs and read arbitrary files on the Jenkins controller.
Patch when possible
- affected<= 1933.v45cec755423f
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.