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CVE-2026-8661

Server-Side Request Forgery in the markdown_to_pdf action of Rapid7 InsightConnect Markdown Plugin on Linux in versions prior to 4.0.2 allows remote attackers to make arbitrary outbound HTTP requests via unsanitized resource-loading HTML elements (img/src, CSS url(), @import) embedded in Markdown input. The initial fix in 4.0.0 disabled JavaScript but did not neutralize resource-loading vectors. Resolved in 4.0.2 by sanitizing HTML with an allowlist of tags, attributes, and URL schemes.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ba2de9a63c91fafe96bf3c80cc07224c48498d18bdb5e72afb22f014862aed02
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-918","description":"CWE-918 Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/problemTypes/0/descriptions/1

{"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:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","platforms":["Linux"],"product":"InsightConnect Markdown Plugin","vendor":"Rapid7","versions":[{"lessThan":"4.0.2","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"4.0.2","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.8,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-918","description":"CWE-918 Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/problemTypes/0/descriptions/1
{"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:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["vendor-advisory"],"url":"https://github.com/rapid7/insightconnect-plugins/blob/master/plugins/markdown/help.md"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/references/0
{"tags":["patch"],"url":"https://github.com/rapid7/insightconnect-plugins/pull/3721"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/rapid7/insightconnect-plugins/pull/4010"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2e53672f6a8c3baf961ea0f823535748d6b5a270cb9fc33f5fb028408b811f6b · sha256:b4a14f68a9deb114… · /containers/cna/references/2

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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