CVE-2026-35599

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Source
https://cve.org/CVERecord?id=CVE-2026-35599
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-35599.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-35599
Aliases
Downstream
Related
Published
2026-04-10T16:05:57Z
Modified
2026-10-16T02:59:02Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Vikunja has an Algorithmic Complexity DoS in Repeating Task Handler
Details

Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the addRepeatIntervalToTime function uses an O(n) loop that advances a date by the task's RepeatAfter duration until it exceeds the current time. By creating a repeating task with a 1-second interval and a due date far in the past, an attacker triggers billions of loop iterations, consuming CPU and holding a database connection for minutes per request. This vulnerability is fixed in 2.3.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-407"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35599.json"
}
References

Affected packages

Git / github.com/go-vikunja/vikunja

Affected ranges

Type
GIT
Repo
https://github.com/go-vikunja/vikunja
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
28b537837f9808dc106c9058b5829c65759fddf2
Fixed
6df0d6c8f54b01db6464c42810e40e55f12b481b
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.3.0"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "6df0d6c8f54b01db6464c42810e40e55f12b481b"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v2.3.0",
            "range":  [
                {
                    "fixed":  "28b537837f9808dc106c9058b5829c65759fddf2"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*
v0.1
v0.10
v0.11
v0.12
v0.13
v0.14.0
v0.15.0
v0.16.0
v0.17.0
v0.18.0
v0.18.1
v0.19.0
v0.19.1
v0.19.2
v0.2
v0.20.0
v0.20.1
v0.20.3
v0.20.4
v0.21.0
v0.22.0
v0.22.1
v0.23.0
v0.24.1
v0.3
v0.4
v0.5
v0.6
v0.7
v0.8
v0.9
v1.*
v1.0.0
v1.0.0-rc0
v1.0.0-rc1
v1.0.0-rc2
v1.0.0-rc3
v1.0.0-rc4
v1.1.0
v2.*
v2.0.0
v2.1.0
v2.2.0
v2.2.1
v2.2.2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-35599.json"