Threats Tagged 'cve-2026-55558'
View all threats tagged with 'cve-2026-55558'. Filter and sort to focus on specific types of threats.
Stop chasing alerts. Route them.
Start free, then upgrade once to turn Radar into an automated delivery engine for your security stack.
Custom feeds / Automations: email, Slack, webhooks, SIEM/MISP / API access (baseline limits)
API access activates after upgrading in Console -> Billing.
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.
Filter Threats
Narrow down the results by type, severity, or affected countries
Threats Tagged 'cve-2026-55558'
Click on any threat for detailed analysis and mitigation recommendations
CVE-2026-55558 is a vulnerability in aiosmtplib affecting versions prior to 5.1.2 when using STARTTLS. The issue arises because data buffered after the server's 220 go-ahead reply and before the TLS handshake is not discarded, allowing an active man-in-the-middle attacker to inject malicious response lines that are parsed as part of the encrypted session, causing desynchronization of command/response pairs. Implicit TLS connections (use_tls=True) are not affected. A fix is available in version 5.1.2. Join the discussion | CVE Database V5 | 08/27/2026, 23:32:22 UTC Added: 08/20/2026, 14:38:09 UTC |
Showing 1 to 1 of 1 result