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CVE-2026-110777— Evolution-data-server: local file disclosure via attach file:// uris

Quick assessment

Affected
GNOME evolution-data-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 evolution-data-server 中发现了一个安全漏洞。当日历事件中在其 ATTACH 属性中包含 file:// URI 时，该漏洞会导致系统在保存事件时自动读取目标本地文件，将其内容以 base64 编码后上传回服务器。此过程缺乏对文件路径的任何限制，也未验证附件最初是否来源于服务器还是由本地添加。因此，攻击者若能够访问共享的 CalDAV 日历，便可在用户与恶意日历事件交互时，窃取用户有权访问的任何任意文件。

CVSS 5.7 · Medium EPSS 0.39% · P32

Affected Version Matrix 6

VendorProduct Version RangeStatus
GNOME evolution-data-server 3.26< 3.62.1 affected
Red Hat Red Hat Enterprise Linux 10 any affected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-110777

Vulnerability Information
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Vulnerability Title
Evolution-data-server: local file disclosure via attach file:// uris
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GNOME evolution-data-server 3.26 ~ 3.62.1 -
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-110777

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III. Intelligence Information for CVE-2026-110777

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Vendor Advisories for CVE-2026-110777 (2)

Other References for CVE-2026-110777 (1)

IV. Related Vulnerabilities

Same vendor: GNOME
Same weakness: CWE-200

V. Comments for CVE-2026-110777

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