What is CVE-2026-48920?

CVE-2026-48920 is a high-severity vulnerability in Jenkins Email_extension, classified under External Control of File Name or Path. CVSS score: 8.8/10. Published 2026-05-27.

How severe is CVE-2026-48920?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Jenkins Email_extension

CVE-2026-48920

Jenkins Email Extension Plugin 1933.v45cec755423f and earlier allows inlining images as `base64` in email content by setting the `data-inline` attribute, without restrictions on the image URLs that can be inlined, allowing attackers able t…

EPSS: 0.004 (63.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jenkins Email_extension — versions 1933.v45cec755423f
Jenkins Project Email Extension Plugin — versions 0

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

jenkinsci-cert@googlegroups.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-48920?: CVE-2026-48920 is a high-severity vulnerability in Jenkins Email_extension, classified under External Control of File Name or Path. CVSS score: 8.8/10. Published 2026-05-27.
How severe is CVE-2026-48920?: High severity. CVSS v3 base score is 8.8 out of 10.