Is this vulnerability remotely exploitable?

It can be, depending on how Vikunja is deployed and who can initiate restore operations. If an attacker can upload or otherwise supply a ZIP archive to the restore endpoint (for example, by compromising an admin account or abusing a misconfigured management interface), they may be able to exploit it remotely.

What level of access is required to exploit the issue?

Typically, the attacker needs access equivalent to someone who can trigger a backup restore in Vikunja—usually an administrative user or an automated process that accepts external backups. The vulnerability is most dangerous when restore functionality is exposed to untrusted sources or when backup archives can be tampered with.

What is the safest general fix pattern?

The safest pattern is to: 1. Canonicalize and validate all archive entry paths against a dedicated base directory before any file operations, rejecting entries that do not conform. 2. Introduce strict length and structure checks before indexing into slices derived from archive metadata. 3. Replace panics with explicit error handling so that malformed archives cause controlled failures instead of crashes.

Severity:

HIGH RISK

(7.2)

Path Traversal & Unhandled Panic (CWE-22, CWE-248) in Vikunja Backup Restore

CVE-2026-27819

Published:

Feb 25, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Path Traversal in Archive Extraction

CWE:

CWE-22;CWE-248

Impact:

Arbitrary File Overwrite and Application Crash with Data Loss

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal in Archive Extraction

CWE:

CWE-22;CWE-248

Impact:

Arbitrary File Overwrite and Application Crash with Data Loss

Severity:

HIGH RISK

(7.2)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Path Traversal & Unhandled Panic (CWE-22, CWE-248) in Vikunja Backup Restore

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare