{"id":"CVE-2026-91979","title":"Vikunja before 2.6.0 fails to limit archive expansion during data import, allowing authenticated users to cause denial of service","summary":"Vikunja before 2.6.0 fails to limit archive expansion during data import, allowing authenticated users to cause denial of service. Attackers can upload highly compressed files that expand to tens of gigabytes in memory and disk, exhausti…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400"],"vendor":"go-vikunja","product":"vikunja","affected":["vikunja < 2.6.0"],"published":"2026-09-15","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:18:54.653","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91979","references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-w7jp-mf2v-8342","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/vikunja-before-2.6.0-denial-of-service-via-decompression-bomb","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-17T19:16:24.646410Z"},"epss":0.00338,"epssPercentile":0.27274,"ingestedAt":"2026-09-15T15:39:12.911Z","slug":"CVE-2026-91979","body":"## Overview\n\nVikunja before 2.6.0 fails to limit archive expansion during data import, allowing authenticated users to cause denial of service. Attackers can upload highly compressed files that expand to tens of gigabytes in memory and disk, exhausting server resources and crashing the instance.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}