---
id: GHSA-37rx-7pj5-p885
title: >-
  Duplicate Advisory: Vikunja: Read-only project members can obtain any link
  share's access hash via the single-share read endpoint (v1 and v2) and
  escalate to the share's permission level
summary: >-
  Duplicate Advisory: Vikunja: Read-only project members can obtain any link
  share's access hash via the single-share read endpoint (v1 and v2) and
  escalate to the share's permission level
severity: high
cvss: 7.5
cwe:
  - CWE-200
vendor: api
product: code.vikunja.io/api
ecosystem: go
affected:
  - code.vikunja.io/api <= 2.5.0
published: '2026-09-15'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T20:51:23Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-37rx-7pj5-p885'
references:
  - url: >-
      https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qfwc-vx6f-3g6g
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-91985'
  - url: >-
      https://www.vulncheck.com/advisories/vikunja-before-2.6.0-privilege-escalation-via-link-share-hash
  - url: 'https://github.com/advisories/GHSA-37rx-7pj5-p885'
tags:
  - ghsa
  - go
ingestedAt: '2026-10-09T21:12:42.331Z'
---

## Overview

### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-qfwc-vx6f-3g6g. This link is maintained to preserve external references.

### Original Description
Vikunja before 2.6.0 fails to properly restrict access to the link-share hash field in single-share read endpoints, allowing read-only members to obtain the share's secret credential. Attackers can exchange the disclosed hash for a link-share JWT at the share's permission level to escalate privileges and perform unauthorized writes or administrative actions.

## Affected packages

- `code.vikunja.io/api <= 2.5.0`

## Remediation

Refer to the advisory for the patched release.