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CVE-2023-27043 is an improper input validation vulnerability in Python's email module through version 3.11.3. The email address parser in email/_parseaddr.py incorrectly handles email addresses containing special characters, causing an incorrect portion of an RFC 2822 header to be interpreted as the addr-spec value. Applications that rely on this parsed value to enforce domain-based email-verification restrictions may accept an attacker-controlled address as belonging to an authorized domain.
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No public exploit code observed for this vulnerability.
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34 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An email-address parsing flaw in Python's email module through version 3.11.3 that can allow bypass of domain-based email-verification access controls.
A moderate-severity vulnerability tracked as CVE-2023-27043, covered by an AlmaLinux 9.2 local security check. The supplied CVSS v3 vector indicates network-reachable exploitation requiring no privileges or user interaction, with low integrity impact.
A vulnerability referenced by the CentOS/TuxCare security update. No technical impact or exploitation details are provided in the content.
A vulnerability addressed by the EulerOS_SA-2026-3456 security advisory.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.