{"id":"CVE-2026-48920","title":"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…","summary":"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…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-73"],"vendor":"jenkins","product":"email_extension","affected":["email_extension <= 1925.v1598902b_58dd","email_extension = 1933.v45cec755423f"],"published":"2026-05-27","updated":"2026-10-14","sourceUpdated":"2026-10-14T20:10:00.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48920","references":[{"url":"https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3705","label":"jenkinsci-cert@googlegroups.com"}],"tags":["nvd"],"epss":0.00509,"epssPercentile":0.41996,"ingestedAt":"2026-10-14T20:53:12.324Z","slug":"CVE-2026-48920","body":"## Overview\n\nJenkins 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 to control the email content to specify `file:` URLs for images to read arbitrary files from the Jenkins controller filesystem.\n\n## Affected\n\n- `email_extension <= 1925.v1598902b_58dd`\n- `email_extension = 1933.v45cec755423f`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}