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CVE-2026-4873

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:90fadbb15595d3af76f68748201133fd79d1a1aa0eec232aa1a0b0e87d9fbcc3
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-319 Cleartext Transmission of Sensitive Information","lang":"en"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-319","description":"CWE-319 Cleartext Transmission of Sensitive Information","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"curl","vendor":"curl","versions":[{"lessThanOrEqual":"8.19.0","status":"affected","version":"8.19.0","versionType":"semver"},{"lessThanOrEqual":"8.18.0","status":"affected","version":"8.18.0","versionType":"semver"},{"lessThanOrEqual":"8.17.0","status":"affected","version":"8.17.0","versionType":"semver"},{"lessThanOrEqual":"8.16.0","status":"affected","version":"8.16.0","versionType":"semver"},{"lessThanOrEqual":"8.15.0","status":"affected","version":"8.15.0","versionType":"semver"},{"lessThanOrEqual":"8.14.1","status":"affected","version":"8.14.1","ve…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/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:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/adp/1/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"description":"CWE-319 Cleartext Transmission of Sensitive Information","lang":"en"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-319","description":"CWE-319 Cleartext Transmission of Sensitive Information","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"http://www.openwall.com/lists/oss-security/2026/04/29/7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/adp/0/references/0
{"name":"www","url":"https://curl.se/docs/CVE-2026-4873.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/cna/references/1
{"name":"json","url":"https://curl.se/docs/CVE-2026-4873.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /containers/cna/references/0
{"name":"issue","url":"https://hackerone.com/reports/3621851"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:94ee5211c791dda6f9cbce432d18fa3ee48786998d88e477f2622718fa7456a1 · sha256:cdd21491d571ab3a… · /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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