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Fencer Intel
medium 5.7

CVE-2026-110777 json

Evolution-data-server: local file disclosure via attach file:// uris

published 26d ago modified 4d ago also EUVD-2026-101521

cvss
5.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

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.

Patch / fix

  • GNOME evolution-data-server 3.62.1

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-110777 updated cvss 5.7

evolution-data-server: local file disclosure via ATTACH file:// URIs

  • Red Hat Enterprise Linux 6 evolution-data-server
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 evolution-data-server, evolution-data-server-perl, evolution-data-server-tests, evolution-data-server-langpacks Red Hat Enterprise Linux 8 evolution-data-server, evolution-data-server-perl, evolution-data-server-tests, evolution-data-server-langpacks Red Hat Enterprise Linux 9 evolution-data-server, evolution-data-server-ui, evolution-data-server-perl, evolution-data-server-tests, evolution-data-server-langpacks Red Hat Enterprise Linux 10 evolution-data-server
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
25d ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.7 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Affected products

  • GNOME evolution-data-server
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.