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CVE-2026-43887

Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, the Outline comment section permits users to mention other users; however, the backend does not validate or sanitize the href attribute associated with these mentions. As a result, potentially dangerous protocols (e.g., javascript:) are not filtered, introducing a risk of client-side code execution. This vulnerability is fixed in 1.7.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:54a487c2d39bdf85c81bf70b44512a4d53f003898244f6ac857c9849823adee4
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"outline","vendor":"outline","versions":[{"status":"affected","version":">= 0.84.0, < 1.7.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:61ccdb8559bcdf23b4be92e8e4fe03580831a45cbb5cd1d07d3e924e8c3041c9 · sha256:14b79f668bae3ee4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:61ccdb8559bcdf23b4be92e8e4fe03580831a45cbb5cd1d07d3e924e8c3041c9 · sha256:14b79f668bae3ee4… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:61ccdb8559bcdf23b4be92e8e4fe03580831a45cbb5cd1d07d3e924e8c3041c9 · sha256:14b79f668bae3ee4… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/outline/outline/security/advisories/GHSA-rqrg-f3qc-xvgh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:61ccdb8559bcdf23b4be92e8e4fe03580831a45cbb5cd1d07d3e924e8c3041c9 · sha256:14b79f668bae3ee4… · /containers/adp/0/references/0
{"name":"https://github.com/outline/outline/security/advisories/GHSA-rqrg-f3qc-xvgh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/outline/outline/security/advisories/GHSA-rqrg-f3qc-xvgh"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:61ccdb8559bcdf23b4be92e8e4fe03580831a45cbb5cd1d07d3e924e8c3041c9 · sha256:14b79f668bae3ee4… · /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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