{"action":"Upgrade aiosmtplib to 5.1.1 or later.","affected":[{"fixed":"5.1.1","introduced":"0"}],"component":"aiosmtplib","cve_ids":["CVE-2026-53533"],"ecosystem":"PyPI","epss":0.00525,"exploited":false,"fixed_versions":["5.1.1"],"ghsa_id":"GHSA-v3q9-hj7j-63hq","id":"tcs_01M5KGYVVKGT6MRV1B295BVE33","modified_at":"2026-07-13T16:31:35.503143756Z","published_at":"2026-07-13T15:46:29.471704Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2338","https://github.com/cole/aiosmtplib/security/advisories/GHSA-v3q9-hj7j-63hq","https://github.com/cole/aiosmtplib","https://pypi.org/project/aiosmtplib","https://github.com/advisories/GHSA-v3q9-hj7j-63hq","https://nvd.nist.gov/vuln/detail/CVE-2026-53533"],"severity":{"label":"medium","score":6.9},"sources":[{"source":"osv","source_id":"PYSEC-2026-2338","url":"https://osv.dev/vulnerability/PYSEC-2026-2338"},{"source":"nvd","source_id":"CVE-2026-53533","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53533"}],"summary":"aiosmtplib vulnerable to SMTP command injection via CR/LF in sender/recipient address"}