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CVE-2026-35036

Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, Ech0 implements link preview (editor fetches a page title) through GET /api/website/title. That is legitimate product behavior, but the implementation is unsafe: the route is unauthenticated, accepts a fully attacker-controlled URL, performs a server-side GET, reads the entire response body into memory (io.ReadAll). There is no host allowlist, no SSRF filter, and InsecureSkipVerify: true on the out
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b50645a5f2c64b2b7439ec4c6622a77f8edfe45a198311e595f905c21671a848
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"Ech0","vendor":"lin-snow","versions":[{"status":"affected","version":"< 4.2.8"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d98194824b12de2a46e1ea97b1289b44cf9d9bfdc02107c4744a9464676c7c13 · sha256:0ae0d3669b51a07e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d98194824b12de2a46e1ea97b1289b44cf9d9bfdc02107c4744a9464676c7c13 · sha256:0ae0d3669b51a07e… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"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:d98194824b12de2a46e1ea97b1289b44cf9d9bfdc02107c4744a9464676c7c13 · sha256:0ae0d3669b51a07e… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/lin-snow/Ech0/security/advisories/GHSA-wc4h-2348-jc3p","tags":["x_refsource_CONFIRM"],"url":"https://github.com/lin-snow/Ech0/security/advisories/GHSA-wc4h-2348-jc3p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d98194824b12de2a46e1ea97b1289b44cf9d9bfdc02107c4744a9464676c7c13 · sha256:0ae0d3669b51a07e… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/lin-snow/Ech0/security/advisories/GHSA-wc4h-2348-jc3p"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d98194824b12de2a46e1ea97b1289b44cf9d9bfdc02107c4744a9464676c7c13 · sha256:0ae0d3669b51a07e… · /containers/adp/0/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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