HIGH
Vikunja before 2.6.0 Privilege Escalation via Link Share Hash
Published Sep 15, 2026
8.7
HIGHCVSS 4.0
EPSS 0.43%
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 products
-
- Version 0StatusaffectedConstraints<2.6.0
- Version 2.6.0StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GO-Vikunja | Vikunja | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (1)
References (2)
- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qfwc-vx6f-3g6g exploitvendor-advisory
- https://www.vulncheck.com/advisories/vikunja-before-2.6.0-privilege-escalation-via-link-share-hash third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/go-vikunja/vikunja/security/advisories/GHSA-qfwc-vx6f-3g6g | exploitvendor-advisory | |
| https://www.vulncheck.com/advisories/vikunja-before-2.6.0-privilege-escalation-via-link-share-hash | third-party-advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner VulnCheck
Published Sep 15, 2026
Updated Sep 15, 2026
Reserved Sep 15, 2026
Link CVE-2026-91985
CISA Vulnrichment
Updated Sep 15, 2026