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CVE-2026-42505

Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2b338849ff8402f632938d77c157c3a5d16634186f38950f43a2fc5385cf42bb
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":"CWE-201: Insertion of Sensitive Information Into Sent Data","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-201","description":"CWE-201 Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"collectionURL":"https://pkg.go.dev","defaultStatus":"unaffected","packageName":"crypto/tls","product":"crypto/tls","programRoutines":[{"name":"clientHelloMsg.marshalMsg"},{"name":"Conn.Handshake"},{"name":"Conn.HandshakeContext"},{"name":"Conn.Read"},{"name":"Conn.Write"},{"name":"Dial"},{"name":"DialWithDialer"},{"name":"Dialer.Dial"},{"name":"Dialer.DialContext"},{"name":"QUICConn.HandleData"},{"name":"QUICConn.SendSessionTicket"},{"name":"QUICConn.Start"}],"vendor":"Go standard library","versions":[{"lessThan":"1.25.12","status":"affected","version":"0","versionType":"semver"},{"lessThan"…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"CWE-201: Insertion of Sensitive Information Into Sent Data","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-201","description":"CWE-201 Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"https://go.dev/cl/775960"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/cna/references/0
{"url":"https://go.dev/issue/79282"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/cna/references/1
{"url":"https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/cna/references/2
{"url":"https://pkg.go.dev/vuln/GO-2026-5856"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:7b8936c2c18591322fa8b6d9d860f24ee2e2422b3263f4705717d357ef23fe9c · sha256:87b96109e0610425… · /containers/cna/references/3

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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