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CVE-2026-28787

OneUptime is a solution for monitoring and managing online services. In version 10.0.11 and prior, the WebAuthn authentication implementation does not store the challenge on the server side. Instead, the challenge is returned to the client and accepted back from the client request body during verification. This violates the WebAuthn specification (W3C Web Authentication Level 2, §13.4.3) and allows an attacker who has obtained a valid WebAuthn assertion (e.g., via XSS, MitM, or log exposure) to
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ef15a5bb2f7550e7c23886187cd8275b484654a12c996e6233d684224ea04eb8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4dfa209e5b6eb1f201eb70fd102463a00ba9e6c73b3959cb7258d68717599966 · sha256:43246bd59134c542… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-294","description":"CWE-294: Authentication Bypass by Capture-replay","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4dfa209e5b6eb1f201eb70fd102463a00ba9e6c73b3959cb7258d68717599966 · sha256:43246bd59134c542… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"oneuptime","vendor":"OneUptime","versions":[{"status":"affected","version":"<= 10.0.11"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:4dfa209e5b6eb1f201eb70fd102463a00ba9e6c73b3959cb7258d68717599966 · sha256:43246bd59134c542… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:4dfa209e5b6eb1f201eb70fd102463a00ba9e6c73b3959cb7258d68717599966 · sha256:43246bd59134c542… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4dfa209e5b6eb1f201eb70fd102463a00ba9e6c73b3959cb7258d68717599966 · sha256:43246bd59134c542… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-294","description":"CWE-294: Authentication Bypass by Capture-replay","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:4dfa209e5b6eb1f201eb70fd102463a00ba9e6c73b3959cb7258d68717599966 · sha256:43246bd59134c542… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion
{"name":"https://github.com/OneUptime/oneuptime/security/advisories/GHSA-gjjc-pcwp-c74m","tags":["x_refsource_CONFIRM"],"url":"https://github.com/OneUptime/oneuptime/security/advisories/GHSA-gjjc-pcwp-c74m"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:4dfa209e5b6eb1f201eb70fd102463a00ba9e6c73b3959cb7258d68717599966 · sha256:43246bd59134c542… · /containers/cna/references/0

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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