Bug 2552752

Summary:	CVE-2026-110777 evolution-data-server: local file disclosure via ATTACH file:// URIs [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	evolution-data-server	Assignee:	Milan Crha <mcrha>
Status:	ON_QA ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	gnome-sig, mcrha, rstrode
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["1170a48b-2f68-4bd4-9051-f7fda8dc0297"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2552693

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.