Bug 2552752 - CVE-2026-110777 evolution-data-server: local file disclosure via ATTACH file:// URIs [fedora-all]
Summary: CVE-2026-110777 evolution-data-server: local file disclosure via ATTACH file:...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora
Classification: Fedora
Component: evolution-data-server
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Milan Crha
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["1170a48b-2f68-4bd4-9051-f...
Depends On:
Blocks: CVE-2026-110777
TreeView+ depends on / blocked
 
Reported: 2026-10-14 18:13 UTC by Guilherme de Almeida Suckevicz
Modified: 2026-10-16 20:56 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
GNOME Gitlab GNOME evolution-data-server issues 672 0 None closed (CVE-2026-110777) Calendar: Limit which local files are inlined in components 2026-10-15 06:33:30 UTC

Description Guilherme de Almeida Suckevicz 2026-10-14 18:13:19 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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. This vulnerability affects evolution-data-server versions 3.26 through 3.62.0 and is fixed in version 3.62.1.

Comment 1 Milan Crha 2026-10-15 06:33:31 UTC
Correct, rawhide and f45 already have their builds with 3.62.1 (and the 3.62.2 will have even better version of the fix). The f44 and f43 might want a backport.

Comment 2 Milan Crha 2026-10-15 06:50:51 UTC
Considering this requires changes also on the evolution side and the f43 is reaching its end of life in a month or so, I decided to not touch the f43 this late.

Comment 3 Fedora Update System 2026-10-15 07:01:06 UTC
FEDORA-2026-cb44cadc9a (evolution-3.62.1-1.fc45, evolution-data-server-3.62.1-1.fc45, and 1 more) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-cb44cadc9a

Comment 4 Fedora Update System 2026-10-15 07:38:23 UTC
FEDORA-2026-df461d043b (evolution-3.60.2-3.fc44 and evolution-data-server-3.60.2-2.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-df461d043b

Comment 5 Fedora Update System 2026-10-16 20:56:41 UTC
FEDORA-2026-df461d043b has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-df461d043b`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-df461d043b

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.


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