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CVE-2026-68581

Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID() interface, a link-share JWT whose numeric ID equals a target user's ID is treated as that user by the /api/v1/tokens endpoints. An authenticated attacker can obtain a target's numeric user ID via authenticated user search, then create link shares on an attacker-writable project
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:96e300bc5a13305166a952b8876288abbd1bd6dcf94e968799187147d17b728e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.6,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","packageURL":"pkg:golang/code.vikunja.io/api","product":"vikunja","vendor":"go-vikunja","versions":[{"lessThan":"2.4.0","status":"affected","version":"0.22.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.6,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-863","description":"Incorrect Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/go-vikunja/vikunja/commit/95b7e673fb5ee407498fa4b13e8b4c57847a4a0b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/references/2
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/go-vikunja/vikunja/commit/e6b25bd57b537ef9a72b5acdadf446ca5ef77bfa"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/references/1
{"name":"GitHub Security Advisory (GHSA-vvcv-vpph-h844)","tags":["vendor-advisory"],"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-vvcv-vpph-h844"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-vvcv-vpph-h844"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/adp/0/references/0
{"name":"VulnCheck Advisory: Vikunja 0.22.0 through 2.3.0 Authentication Bypass via Principal ID Collision","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/vikunja-through-authentication-bypass-via-principal-id-collision"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fc2aeb0dde27fdaf8afee5563bcfa14d860ed5c5edcd2121ad18f35f179ad32 · sha256:9972d92a06767a18… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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