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CVE-2026-33680

Vikunja Vulnerable to Link Share Hash Disclosure via ReadAll Endpoint Enables Permission Escalation

Published: Mar 24, 2026Updated: Mar 30, 2026 Sources: CVE List NVDCWE-285
7.5HIGH
NVD MITRE
EPSS Score
0.4%
Top 68.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.2, the `LinkSharing.ReadAll()` method allows link share authenticated users to list all link shares for a project, including their secret hashes. While `LinkSharing.CanRead()` correctly blocks link share users from reading individual shares via `ReadOne`, the `ReadAllWeb` handler bypasses this check by never calling `CanRead()`. An attacker with a read-only link share can retrieve hashes for write or admin link shares on the same project and authenticate with them, escalating to full admin access. Version 2.2.2 patches the issue.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-285

Affected Products

vikunjago-vikunja
On-prem
Cloud & SaaS / saas-application
vikunjavikunja
On-prem
Enterprise Software / collaboration-groupware
go-vikunjaoss-projectCloud & SaaSaka vikunja
vikunjaoss-projectEnterprise Software

Exploitability

Official Patch Available
No detection template yetWe can run the check for you — a free external exposure review, no install. Check my exposure

References

https://github.com/go-vikunja/vikunja/security/advisories/GHSA-8hp8-9fhr-pfm9
github.com
https://github.com/go-vikunja/vikunja/commit/9efe1fadba817923c7c7f5953c3e9e9c5683bbf3
github.com
https://vikunja.io/changelog/vikunja-v2.2.2-was-released
vikunja.io

Timeline

Published
Mar 24, 2026
Last Updated
Mar 30, 2026

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