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: CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in cole aiosmtplibCVE-2026-55558 0 A vulnerability in aiosmtplib prior to version 5.1.2 allows an active network attacker to desynchronize SMTP command and response pairs during a STARTTLS handshake. This occurs because the SMTPProtocol.start_tls method does not clear its internal buffer after consuming the server's 220 response, causing attacker-injected SMTP response lines to be parsed incorrectly after the transport upgrade. Connections using start_tls=True or opportunistic STARTTLS are affected, while those using use_tls=True are not. The issue is fixed in version 5.1.2. Join the discussion | CVE Database V5 | 08/20/2026, 14:29:58 UTC Added: 08/20/2026, 14:38:09 UTC |
Showing 1 to 1 of 1 result