CVE-2026-91969: Uncontrolled Resource Consumption in go-vikunja vikunja
vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the POST /api/v2/migration/csv/migrate endpoint that fails to limit parsed row cardinality. Authenticated attackers can upload multipart CSV files with millions of tiny records to exhaust process memory and terminate the API service.
AI Analysis
Technical Summary
The vulnerability CVE-2026-91969 affects go-vikunja's vikunja product in versions >=2.5.0 and <2.6.0. The POST /api/v2/migration/csv/migrate endpoint does not limit the number of parsed rows in uploaded CSV files. An authenticated attacker can exploit this by sending multipart CSV files containing millions of small records, leading to uncontrolled resource consumption (memory exhaustion) and causing the API service to terminate unexpectedly.
Potential Impact
Successful exploitation leads to denial of service by exhausting process memory and terminating the API service. There is no impact on confidentiality or integrity as per the CVSS vector. The attack requires authentication and network access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the vulnerable endpoint to trusted users only and monitor for unusual large CSV upload attempts. Consider implementing rate limiting or size restrictions on CSV uploads if possible.
CVE-2026-91969: Uncontrolled Resource Consumption in go-vikunja vikunja
Description
vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the POST /api/v2/migration/csv/migrate endpoint that fails to limit parsed row cardinality. Authenticated attackers can upload multipart CSV files with millions of tiny records to exhaust process memory and terminate the API service.
CVSS v3.1
Score 6.5medium
Affected software
go-vikunja
vikunja
pkg:golang/github.com/go-vikunja/vikunjaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-91969 affects go-vikunja's vikunja product in versions >=2.5.0 and <2.6.0. The POST /api/v2/migration/csv/migrate endpoint does not limit the number of parsed rows in uploaded CSV files. An authenticated attacker can exploit this by sending multipart CSV files containing millions of small records, leading to uncontrolled resource consumption (memory exhaustion) and causing the API service to terminate unexpectedly.
Potential Impact
Successful exploitation leads to denial of service by exhausting process memory and terminating the API service. There is no impact on confidentiality or integrity as per the CVSS vector. The attack requires authentication and network access.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the vulnerable endpoint to trusted users only and monitor for unusual large CSV upload attempts. Consider implementing rate limiting or size restrictions on CSV uploads if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-15T11:09:54.872Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa9651c55bf5e2cf502eb22
Added to database: 09/15/2026, 15:32:44 UTC
Last enriched: 09/15/2026, 15:47:44 UTC
Last updated: 09/16/2026, 02:32:25 UTC
Views: 9
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.