Uncontrolled Resource Consumption in Vikunja Product by Vikunja
CVE-2026-123501

7.1HIGH

Key Information:

Vendor

Go-vikunja

Status
Vikunja
Vendor
CVE Published:
8 November 2026

What is CVE-2026-123501?

Vikunja versions prior to 2.7.1 contain a significant vulnerability allowing authenticated users to cause server memory exhaustion. By exploiting this flaw, attackers can execute concurrent uploads of multiple small, highly compressible PNG images, each rendered at resolutions up to 50 megapixels. This could lead to excessive memory consumption, resulting in degraded performance or even crashes due to out-of-memory (OOM) conditions triggered in the API process.

Affected Version(s)

vikunja 0 < 2.7.1

vikunja 2.7.1

References

https://github.com/go-vikunja/vikunja/security/advisories...
vendor-advisory
https://www.vulncheck.com/advisories/vikunja-before-2.7.1...
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.