Vikunja
CVE-2026-27819
HIGH
GHSA-42wg-38gx-85rh
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
-
AccessCraft malicious ZIP archive with path traversal payloads
-
ExploitUpload ZIP to restoreConfig function
-
ExecutionBypass directory extraction validation
-
ImpactOverwrite arbitrary files on host
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Path canonicalization, traversal prevention
MITRE ATT&CK
2 techniques across 2 tactics: Discovery, Collection The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Requires authenticated admin/high-privilege account to access restoreConfig function. Vikunja versions prior to 2.0.0 with ZIP archive restoration feature enabled. No special network or protocol configuration required beyond standard HTTP access to Vikunja instance. |
| Impact | CVSS 7.2 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: High. User interaction: None. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
Get an e-mail when this CVE is exploited, patched or re-scored. Free account.
Alert meAnalysisAIv1 – Mar 12, 2026
Vikunja before version 2.0.0 contains a path traversal vulnerability in its backup restoration function that fails to validate file paths in ZIP archives, allowing attackers with high privileges to write arbitrary files to the host system. Public exploit code exists for this vulnerability, and malformed archives can trigger a denial of service that permanently wipes the database before crashing the application. The flaw affects Vikunja and the underlying Go platform, with no patch currently available.
Earlier versions of this analysis (1)
Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the restoreConfig function in vikunja/pkg/modules/dump/restore.go of the go-vikunja/vikunja repository fails to sanitize file paths within the provided ZIP archive. [CVSS 7.2 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Validate and sanitize file path inputs. Use allowlists. Restrict network access to the affected service where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in go
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-22 (Path Traversal). Affects Vikunja. Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the restoreConfig function in vikunja/pkg/modules/dump/restore.go of the go-vikunja/vikunja repository fails to sanitize file paths within the provided ZIP archive. A maliciously crafted ZIP can bypass the intended extraction directory to overwrite arbitrary files on the host system. Additionally, we’ve discovered that a malformed archive triggers a runtime panic, crashing the process immediately after the da
Know when Vikunja gets its next vulnerability
- Watch products and get an email when something new is published
- Check this CVE against your own stack and servers
- Exploit and PoC references, threat intelligence from 22 sources
No credit card · 7-day full trial
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory.
CVSS VectorGitHub Advisory
Lifecycle Timeline
2DescriptionGitHub Advisory
Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the restoreConfig function in vikunja/pkg/modules/dump/restore.go of the go-vikunja/vikunja repository fails to sanitize file paths within the provided ZIP archive. A maliciously crafted ZIP can bypass the intended extraction directory to overwrite arbitrary files on the host system. Additionally, we’ve discovered that a malformed archive triggers a runtime panic, crashing the process immediately after the database has been wiped permanently. The application trusts the metadata in the ZIP archive. It uses the Name attribute of the zip.File struct directly in os.OpenFile calls without validation, allowing files to be written outside the intended directory. The restoration logic assumes a specific directory structure within the ZIP. When provided with a "minimalist" malicious ZIP, the application fails to validate the length of slices derived from the archive contents. Specifically, at line 154, the code attempts to access an index of len(ms)-2 on an insufficiently populated slice, triggering a panic. Version 2.0.0 fixes the issue.
Executive ViewAI
Vikunja task management instances are vulnerable to arbitrary file write attacks through malicious ZIP archives, potentially allowing attackers to overwrite critical system files and gain unauthorized access. Organizations using Vikunja versions prior to 2.0.0 face immediate risk of data compromise and system integrity violations, particularly if the platform is exposed to untrusted users or the internet.
- Disable ZIP restore functionality entirely via configuration until patch availability; 2) Restrict restore/import feature access to local administrators only, removing any remote or guest access; 3) Implement strict file system permissions and SELinux/AppArmor policies to limit Vikunja process write scope; 4) Deploy WAF rules to block suspicious ZIP uploads if Vikunja is internet-facing; 5) Monitor file system integrity using tools like AIDE or Tripwire to detect unauthorized file modifications; 6) Run Vikunja in a containerized environment with read-only root filesystem where possible.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)GitHub Advisory
Weak password policy in Vikunja task management before 2.0.0 allows users to set trivially guessable passwords. PoC avai
Stored cross-site scripting (XSS) in Vikunja prior to version 2.0.0 allows authenticated attackers to steal authenticati
Vikunja is an open-source self-hosted task management platform. [CVSS 6.1 MEDIUM]
Business logic vulnerability in Vikunja task management platform before 2.1.0 allows incomplete resource cleanup, potent
Cross-tenant information disclosure in the self-hosted task manager Vikunja (0.24.0 through 2.3.0) lets a holder of any
Instance-wide data breach in Vikunja before 2.2.1 lets remote attackers exfiltrate and destroy every file attachment acr
Vikunja instances before 2.6.0 expose CalDAV BasicAuth endpoints (/dav, /.well-known, and /feeds) that are not covered b
Vikunja versions before 2.6.0 ship authentication endpoints under /api/v2 (login, register, password-reset, and OAuth to
Vikunja prior to 2.6.0 leaks the secret hash that backs a project's link shares through its single-share read endpoint,
Principal type confusion in Vikunja (versions 0.22.0-2.3.0) allows an authenticated low-privilege attacker to fully cont
Privilege escalation in Vikunja 2.3.0 allows a user who holds a narrowly scoped API token (permissions {"oauth":["author
Plaintext storage of password-reset, email-confirmation and account-deletion tokens in Vikunja prior to 2.4.0 allows any
Exploit-DB