{"id":"CVE-2026-110777","aliases":["DEBIAN-CVE-2026-110777","EUVD-2026-101521","GHSA-vfc3-547x-wpx2","UBUNTU-CVE-2026-110777"],"status":"published","title":"Evolution-data-server: local file disclosure via attach file:// uris","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","severity":{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00381,"percentile":0.32627,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2026-10-14T18:08:36Z","modified":"2026-11-05T16:21:22Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.46.4-2","3.46.4-2+deb12u1","3.47.2-1","3.47.3-1","3.47.3-2","3.48.0-1","3.48.1-1","3.48.2-1","3.48.3-1","3.48.4-1","3.49.2-1","3.49.2-2","3.49.2-3","3.49.2-4","3.49.3-1","3.50.0-1","3.50.1-1","3.50.2-1","3.50.3-1","3.50.3-1.1~exp1","3.50.3-2","3.50.3-2.1","3.50.3-2.2","3.51.2-1","3.52.0-1","3.52.1-1","3.52.1-2","3.52.2-1","3.52.3-1","3.52.4-1","3.53.2-1","3.53.3-1","3.54.0-1","3.54.1-1","3.54.2-1","3.54.3-1","3.55.1-1","3.55.2-1","3.55.3-1","3.56.0-1","3.56.1-1","3.56.1-2","3.56.2-1","3.56.2-2","3.56.2-3","3.56.2-4","3.56.2-5","3.56.2-6","3.56.2-7","3.56.2-8","3.56.2-9","3.62.0-1","3.62.1-1","3.62.1-2"]},{"source":"osv","ecosystem":"Debian:13","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.56.1-2","3.56.2-0+deb13u1","3.56.2-1","3.56.2-2","3.56.2-3","3.56.2-4","3.56.2-5","3.56.2-6","3.56.2-7","3.56.2-8","3.56.2-9","3.62.0-1","3.62.1-1","3.62.1-2"]},{"source":"osv","ecosystem":"Debian:14","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.56.1-2","3.56.2-1","3.56.2-2","3.56.2-3","3.56.2-4","3.56.2-5","3.56.2-6","3.56.2-7","3.56.2-8","3.56.2-9","3.62.0-1","3.62.1-1","3.62.1-2"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.16.5-1ubuntu3","3.18.1-1ubuntu1","3.18.2-0ubuntu1","3.18.2-0ubuntu2","3.18.3-1ubuntu1","3.18.3-1ubuntu2","3.18.4-0ubuntu1","3.18.5-1ubuntu1","3.18.5-1ubuntu1.1","3.18.5-1ubuntu1.2","3.18.5-1ubuntu1.3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.26.1-1ubuntu1","3.26.2-1ubuntu1","3.26.2.1-1ubuntu1","3.26.2.1-1ubuntu3","3.26.3-1ubuntu1","3.26.5-1ubuntu3","3.27.90-1ubuntu1","3.28.0-1ubuntu1","3.28.0-2ubuntu1","3.28.0-2ubuntu2","3.28.1-1ubuntu1","3.28.3-0ubuntu0.18.04.1","3.28.5-0ubuntu0.18.04.1","3.28.5-0ubuntu0.18.04.2","3.28.5-0ubuntu0.18.04.3","3.28.5-0ubuntu0.18.04.3+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.34.1-1","3.34.1-1build1","3.34.1-1ubuntu1","3.34.1-2","3.34.3-2","3.35.91-1","3.35.92-1","3.36.0-1","3.36.1-1","3.36.1-2","3.36.2-0ubuntu1","3.36.3-0ubuntu1","3.36.3-0ubuntu1.1","3.36.4-0ubuntu1","3.36.5-0ubuntu1","3.36.5-0ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.40.4-1","3.42.0-2","3.42.1-1","3.42.2-1","3.42.3-1","3.42.4-1","3.43.3-1","3.44.0-2","3.44.1-0ubuntu2","3.44.2-0ubuntu1","3.44.4-0ubuntu1","3.44.4-0ubuntu1.1","3.44.4-0ubuntu1.2"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.50.0-1","3.50.1-1","3.50.2-1","3.50.2-1build1","3.50.3-1","3.52.0-1build1","3.52.0-1build2","3.52.0-1build3","3.52.3-0ubuntu1","3.52.3-0ubuntu1.1","3.52.3-0ubuntu1.2"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.56.2-8","3.56.2-9"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"evolution-data-server","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.56.2-3","3.56.2-4","3.56.2-4build1","3.56.2-5","3.56.2-6","3.56.2-7","3.56.2-8"]}],"products":[{"vendor":"gnome","product":"evolution-data-server"},{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-110777","tags":["vdb-entry","x_refsource_REDHAT","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552693","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/672","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110777","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vfc3-547x-wpx2"},{"url":"https://access.redhat.com/downloads/content/package-browser/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110777.json","tags":["advisory"]},{"url":"https://gitlab.gnome.org/GNOME/evolution-data-server","tags":["package"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-110777","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-110777","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-110777","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-110777","title":"Evolution-data-server: local file disclosure via attach file:// uris","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","status":"published","published":"2026-10-14T18:08:36.828Z","modified":"2026-11-05T16:21:22.548Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-05T17:53:58.925122Z"}],"euvd":[{"id":"EUVD-2026-101521","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","status":"published","published":"2026-10-14T18:08:36Z","modified":"2026-11-05T16:21:22Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-05T18:00:58.377138Z"}],"ghsa":[{"id":"GHSA-vfc3-547x-wpx2","title":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their...","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","status":"published","published":"2026-10-14T18:32:29Z","modified":"2026-10-14T18:32:35Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:13:28.606179Z"}],"nvd":[{"id":"CVE-2026-110777","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","status":"published","published":"2026-10-14T18:17:36.49Z","modified":"2026-11-05T17:17:37.09Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-200"],"updated_at":"2026-11-05T19:56:03.188345Z"}],"osv":[{"id":"CVE-2026-110777","title":"Evolution-data-server: local file disclosure via attach file:// uris","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","status":"published","published":"2026-10-14T18:08:36.828Z","modified":"2026-11-07T02:31:10.574688323Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-07T03:08:00.544003Z"},{"id":"DEBIAN-CVE-2026-110777","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","status":"published","published":"2026-10-14T18:17:36.49Z","modified":"2026-10-16T09:47:24.849215843Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:49.824149Z"},{"id":"UBUNTU-CVE-2026-110777","description":"A flaw was found in evolution-data-server. Calendar events containing a file:// URI in their ATTACH property automatically read the targeted local file, base64-encode its contents and upload it back to the server when the event is saved. There are no file path restrictions or checks to verify whether the attachment originally came from the server or was added locally. This allows an attacker with access to a shared CalDAV calendar to exfiltrate arbitrary files the user has access to when interacting with malicious calendar events.","status":"published","published":"2026-10-14T18:17:00Z","modified":"2026-10-28T17:50:34Z","cvss":[{"version":"3.1","score":5.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T16:55:59.591851Z"}]}}