CVE Explorer

CVE-2026-33640

Outline is a service that allows for collaborative documentation. Outline implements an Email OTP login flow for users not associated with an Identity Provider. Starting in version 0.86.0 and prior to version 1.6.0, Outline does not invalidate OTP codes based on amount or frequency of invalid submissions, rather it relies on the rate limiter to restrict attempts. Consequently, identified bypasses in the rate limiter permit unrestricted OTP code submissions within the codes lifetime. This allows

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6def1382984f515800989e077dd01d59a9e76df002d0a113879a8803912f56d7

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"outline","vendor":"outline","versions":[{"status":"affected","version":">= 0.86.0, < 1.6.0"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:82fcd07a90bdaeb41888287ce1a27bcb95f87c5bc60e8ac1598822ecd1fcfe59 · sha256:0f9cce92604dd1fc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.1,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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:v2:82fcd07a90bdaeb41888287ce1a27bcb95f87c5bc60e8ac1598822ecd1fcfe59 · sha256:0f9cce92604dd1fc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-307","description":"CWE-307: Improper Restriction of Excessive Authentication Attempts","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:82fcd07a90bdaeb41888287ce1a27bcb95f87c5bc60e8ac1598822ecd1fcfe59 · sha256:0f9cce92604dd1fc… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/outline/outline/releases/tag/v1.6.0","tags":["x_refsource_MISC"],"url":"https://github.com/outline/outline/releases/tag/v1.6.0"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:82fcd07a90bdaeb41888287ce1a27bcb95f87c5bc60e8ac1598822ecd1fcfe59 · sha256:0f9cce92604dd1fc… · /containers/cna/references/1

{"name":"https://github.com/outline/outline/security/advisories/GHSA-cwhc-53hw-qqx6","tags":["x_refsource_CONFIRM"],"url":"https://github.com/outline/outline/security/advisories/GHSA-cwhc-53hw-qqx6"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:82fcd07a90bdaeb41888287ce1a27bcb95f87c5bc60e8ac1598822ecd1fcfe59 · sha256:0f9cce92604dd1fc… · /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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