{"id":"EUVD-2026-78647","enisaUuid":"0d3ddbf0-181a-3a5d-8bd8-67dd7bf867f3","description":"Vikunja before 2.6.0 fails to apply pixel decode limits to avatar and project-background upload endpoints, allowing authenticated users to upload crafted images that decode to excessive pixel counts. Attackers can upload small images with extreme aspect ratios that consume significant CPU and memory during processing, causing denial of service through repeated or concurrent uploads.","datePublished":"Sep 15, 2026, 3:18:22 PM","dateUpdated":"Sep 21, 2026, 6:48:39 PM","baseScore":7.1,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-4vh2-39rq-rq8j\nhttps://www.vulncheck.com/advisories/vikunja-before-2.6.0-denial-of-service-via-avatar-upload\n","aliases":"CVE-2026-91971\nGHSA-69rj-q3v9-vffp\nGHSA-4vh2-39rq-rq8j\n","assigner":"VulnCheck","epss":0.44,"enisaIdProduct":[{"id":"429454c0-0270-35db-9908-21616b9eeeeb","product":{"name":"vikunja","vendor":{"name":"go-vikunja"}},"product_version":"0 \u003c2.6.0"}],"enisaIdVendor":[{"id":"fdfa1cc7-6028-3d40-9278-0f11900e4b68","vendor":{"name":"go-vikunja"}}],"enisaIdVulnerability":[{"id":"66626b26-6838-3661-bf80-27bd25baba30","vulnerability":{"id":"GHSA-69rj-q3v9-vffp","description":"Duplicate Advisory: Vikunja: Unbounded image decode on avatar and project-background uploads enables decode/resize amplification","datePublished":"Sep 15, 2026, 6:32:30 PM","dateUpdated":"Oct 9, 2026, 8:52:09 PM","baseScore":0.0,"references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-4vh2-39rq-rq8j\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-91971\nhttps://www.vulncheck.com/advisories/vikunja-before-2.6.0-denial-of-service-via-avatar-upload\n","enisa_id":"EUVD-2026-78647\n","aliases":"GHSA-69rj-q3v9-vffp\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:05:47 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"90f5f4f3-1cd8-325d-b5a0-418f8a972569","vulnerability":{"id":"CVE-2026-91971","description":"Vikunja before 2.6.0 fails to apply pixel decode limits to avatar and project-background upload endpoints, allowing authenticated users to upload crafted images that decode to excessive pixel counts. Attackers can upload small images with extreme aspect ratios that consume significant CPU and memory during processing, causing denial of service through repeated or concurrent uploads.","datePublished":"Sep 15, 2026, 3:18:22 PM","dateUpdated":"Sep 21, 2026, 6:48:39 PM","status":"PUBLISHED","baseScore":7.1,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-4vh2-39rq-rq8j\nhttps://www.vulncheck.com/advisories/vikunja-before-2.6.0-denial-of-service-via-avatar-upload\n","enisa_id":"EUVD-2026-78647\n","assigner":"VulnCheck","epss":0.44,"dataProcessed":"Nov 7, 2026, 7:21:11 AM","vulnerabilityProduct":[{"id":"f02c79f8-c20f-3a9d-be3e-b365e4fd8908","product":{"name":"vikunja","vendor":{"name":"go-vikunja"}},"product_version":"0 \u003c2.6.0"}],"vulnerabilityVendor":[{"id":"215e09cd-318a-3cb5-b28b-e71d2670b4fe","vendor":{"name":"go-vikunja"}}]}},{"id":"d9dcba20-a75c-3f04-8492-1a61fb689411","vulnerability":{"id":"GHSA-4vh2-39rq-rq8j","description":"Vikunja: Unbounded image decode on avatar and project-background uploads enables decode/resize amplification","datePublished":"Oct 9, 2026, 8:52:15 PM","dateUpdated":"Oct 9, 2026, 8:52:16 PM","baseScore":0.0,"references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-4vh2-39rq-rq8j\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-91971\nhttps://github.com/go-vikunja/vikunja/pull/3688\nhttps://github.com/go-vikunja/vikunja\nhttps://github.com/go-vikunja/vikunja/releases/tag/v2.6.0\nhttps://www.vulncheck.com/advisories/vikunja-before-2.6.0-denial-of-service-via-avatar-upload\n","enisa_id":"EUVD-2026-78647\n","aliases":"GHSA-4vh2-39rq-rq8j\nCVE-2026-91971\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:07:07 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}