{"id":"CVE-2024-34083","aliases":["GHSA-wgjv-9j3q-jhg8","PYSEC-2026-1111"],"title":"aiosmtpd STARTTLS unencrypted commands injection","summary":"aiosmtpd STARTTLS unencrypted commands injection","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","vendor":"aiosmtpd","product":"aiosmtpd","ecosystem":"pip","affected":["aiosmtpd < 1.4.6"],"patched":["aiosmtpd 1.4.6"],"published":"2024-05-20","updated":"2026-07-07","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-wgjv-9j3q-jhg8","references":[{"url":"https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-wgjv-9j3q-jhg8"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-34083"},{"url":"https://github.com/aio-libs/aiosmtpd/commit/b3a4a2c6ecfd228856a20d637dc383541fcdbfda"},{"url":"https://github.com/aio-libs/aiosmtpd"},{"url":"https://nostarttls.secvuln.info"}],"tags":["osv","pip"],"epss":0.00228,"epssPercentile":0.13811,"ingestedAt":"2026-07-08T18:25:53.628Z","slug":"CVE-2024-34083","body":"## Overview\n\n### Summary\nServers based on aiosmtpd accept extra unencrypted commands after STARTTLS, treating them as if they came from inside the encrypted connection. This could be exploited by a MitM attack.\n\n### References\n* [NO STARTTLS: Similar vulnerabilities discovered by previous researchers.](https://nostarttls.secvuln.info/)\n\n## Affected packages\n\n- `aiosmtpd < 1.4.6`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `aiosmtpd 1.4.6`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}