{"id":"CVE-2026-48920","aliases":["GHSA-mq58-m26g-46gp"],"url":"https://o3.security/vulnerability/CVE-2026-48920","summary":"Jenkins Email Extension Plugin: Attackers able to control email content may specify `file:` URLs for images to read arbitrary files from Jenkins controller filesystem","details":"Jenkins Email Extension Plugin 1933.v45cec755423f and earlier includes a feature that allows inlining images as `base64` in email content by setting the `data-inline` attribute. No restrictions are placed on the image URLs that can be inlined.\n\nThis allows attackers able to control the email content to specify `file:` URLs for images to read arbitrary files from the Jenkins controller filesystem.\n\nThe feature allowing inlining images as `base64` in email content by setting the `data-inline` attribute is removed from Email Extension Plugin 1933.1935.v276319e3cc47.","published":"2026-05-27T15:16:31.647Z","modified":"2026-07-15T06:10:15.604969Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00288,"percentile":0.20721,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.jenkins-ci.plugins:email-ext","fixedVersion":"1933.1935.v276319e3cc47"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3705"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48920"},{"type":"PACKAGE","url":"https://github.com/jenkinsci/email-ext-plugin"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T06:10:15.604969Z"}}