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CVE-2026-4881

In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a259741ba66402d428f1166f994b23260d2db40a3b3242400eb1fd79e20fac71
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

{"description":"Insufficient permission checks on an API endpoint","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:793233eb700777e0a4394fbde2258a7088e82c630f2f550128bc8f237b792fe1 · sha256:6fb593b583fd5605… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-862","description":"CWE-862 Missing Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:793233eb700777e0a4394fbde2258a7088e82c630f2f550128bc8f237b792fe1 · sha256:6fb593b583fd5605… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["Windows","Linux"],"product":"Octopus Server","vendor":"Octopus Deploy","versions":[{"lessThan":"2025.4.10523","status":"affected","version":"2023.0.0","versionType":"custom"},{"lessThan":"2025.4.10545","status":"affected","version":"2025.4.0","versionType":"custom"},{"lessThan":"2026.1.11313","status":"affected","version":"2026.1.0","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:793233eb700777e0a4394fbde2258a7088e82c630f2f550128bc8f237b792fe1 · sha256:6fb593b583fd5605… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:793233eb700777e0a4394fbde2258a7088e82c630f2f550128bc8f237b792fe1 · sha256:6fb593b583fd5605… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"description":"Insufficient permission checks on an API endpoint","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:793233eb700777e0a4394fbde2258a7088e82c630f2f550128bc8f237b792fe1 · sha256:6fb593b583fd5605… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-862","description":"CWE-862 Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:793233eb700777e0a4394fbde2258a7088e82c630f2f550128bc8f237b792fe1 · sha256:6fb593b583fd5605… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

1 source assertion
{"url":"https://advisories.octopus.com/post/2026/sa2026-04"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:793233eb700777e0a4394fbde2258a7088e82c630f2f550128bc8f237b792fe1 · sha256:6fb593b583fd5605… · /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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