FKIE_CVE-2026-40103

Vulnerability from fkie_nvd - Published: 2026-04-10 17:17 - Updated: 2026-04-17 22:03
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Summary
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's scoped API token enforcement for custom project background routes is method-confused. A token with only projects.background can successfully delete a project background, while a token with only projects.background_delete is rejected. This is a scoped-token authorization bypass. This vulnerability is fixed in 2.3.0.
References
security-advisories@github.comhttps://github.com/go-vikunja/vikunja/commit/6a0f39b252a81fa4b19dc56dc889183acc9225aePatch
security-advisories@github.comhttps://github.com/go-vikunja/vikunja/pull/2584Issue Tracking
security-advisories@github.comhttps://github.com/go-vikunja/vikunja/releases/tag/v2.3.0Release Notes
security-advisories@github.comhttps://github.com/go-vikunja/vikunja/security/advisories/GHSA-v479-vf79-mg83Exploit, Vendor Advisory
Impacted products
Vendor Product Version
vikunja vikunja *
To clipboard 

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              "criteria": "cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*",
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  "descriptions": [
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      "value": "Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja\u0027s scoped API token enforcement for custom project background routes is method-confused. A token with only projects.background can successfully delete a project background, while a token with only projects.background_delete is rejected. This is a scoped-token authorization bypass. This vulnerability is fixed in 2.3.0."
    }
  ],
  "id": "CVE-2026-40103",
  "lastModified": "2026-04-17T22:03:51.840",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
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      "tags": [
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  "vulnStatus": "Analyzed",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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