Evolution-data-server: local file disclosure via attach file:// uris
CVSS score
5.7
EPSS probability
—
Risk score
0.6
Published
3 h ago
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Impact on My Inventory
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
An information exposure vulnerability in evolution-data-server (CVE-2026-110777) allows local files to be read and uploaded back to the server via malicious calendar events in shared CalDAV calendars [S0]. This flaw requires user interaction and authentication [S0]. The patch status remains unconfirmed in official sources [S0].
This vulnerability allows an attacker with shared calendar access to exfiltrate sensitive local files accessible to the user [S0]. Such behavior increases the risk of unauthorized data exposure and privacy breaches [S0].
What should be done?
- Follow vendor advisories as the patch status is currently unknown [S0].
- Avoid interacting with suspicious or unknown calendar events in shared calendars [S0].
- Review CalDAV calendar access permissions and shared content [S0].
Chain of evidence and sources
evolution-data-server bileşenindeki zafiyet, file:// URI içeren ATTACH özellikli etkinliklerin yerel dosyaları okuyup sunucuya yüklemesine neden olur [S0].
Paylaşılan CalDAV takvimlerine erişimi olan bir saldırgan, kullanıcı etkileşimi yoluyla rastgele dosyaları sızdırabilir [S0].
İncelenen resmî kaynaklarda zafiyete yönelik yama durumu doğrulanamamıştır [S0].
Show the technical text from the sources
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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
CWE: CWE-200
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-110777 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 5.7 | CVSS V31 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N | NVD |
| 5.7 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-110777 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-110777 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
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