Email threat landscape: Q2 2026 trends and insights

In this article 1. Tycoon2FA Q2 disruption impact 2. QR code phishing attacks 3. CAPTCHA-gated phishing tactics 4. Malicious payloads 5. Business email compromise 6. Microsoft Teams threats 7. Notable phishing campaigns 8. Mitigation and protection guidance 9. Indicators of compromise IOCs The...

Email threat landscape: Q2 2026 trends and insights

In this article 1. Tycoon2FA Q2 disruption impact 2. QR code phishing attacks 3. CAPTCHA-gated phishing tactics 4. Malicious payloads 5. Business email compromise 6. Microsoft Teams threats 7. Notable phishing campaigns 8. Mitigation and protection guidance 9. Indicators of compromise IOCs The...

Incorrect Behavior Order: Validate Before Canonicalize

Overview next-auth is an Authentication for Next.js Affected versions of this package are vulnerable to Incorrect Behavior Order: Validate Before Canonicalize in the email/magic-link sign-in process. An attacker can gain unauthorized access to a victim's account by submitting an email address...

Auth.js: Email normalizer validates the address before Unicode normalization, allowing a homoglyph @ bypass

Summary The default email-address normalizer used by the email/magic-link sign-in flow validates the address before applying Unicode normalization. An address can contain a Unicode character that is not an ASCII @ U+0040 but canonicalizes to one under NFKC/NFKD normalization the normalization...

NPM: Auth.js: Email normalizer validates the address before Unicode normalization, allowing a homoglyph @ bypass

NPM: Auth.js: Email normalizer validates the address before Unicode normalization, allowing a homoglyph @ bypass vulnerability discovered by ? in WordPress Npm next-auth versions = 4.10.3, 4.24.15...

Incorrect Behavior Order: Validate Before Canonicalize

Overview @auth/core is an Authentication for the Web. Affected versions of this package are vulnerable to Incorrect Behavior Order: Validate Before Canonicalize in the email/magic-link sign-in process. An attacker can gain unauthorized access to a victim's account by submitting an email address...

GHSA-7RQJ-J65F-68WH Auth.js: Email normalizer validates the address before Unicode normalization, allowing a homoglyph @ bypass

Summary The default email-address normalizer used by the email/magic-link sign-in flow validates the address before applying Unicode normalization. An address can contain a Unicode character that is not an ASCII @ U+0040 but canonicalizes to one under NFKC/NFKD normalization the normalization...

PraisonAI: IMAP Command Injection via Unsanitized Email Search Parameters

SummaryThe email search tool in src/praisonai-agents/praisonaiagents/tools/emailtools.py constructs IMAP SEARCH commands by interpolating LLM-controlled parameters fromaddr, subject, query directly into IMAP protocol strings using f-string formatting with double-quote delimiters. An attacker who...

PYSEC-2026-3532 PraisonAI: IMAP Command Injection via Unsanitized Email Search Parameters

Summary The email search tool in src/praisonai-agents/praisonaiagents/tools/emailtools.py constructs IMAP SEARCH commands by interpolating LLM-controlled parameters fromaddr, subject, query directly into IMAP protocol strings using f-string formatting with double-quote delimiters. An attacker who...

PT-2026-64134

Summary The email search tool in src/praisonai-agents/praisonaiagents/tools/email tools.py constructs IMAP SEARCH commands by interpolating LLM-controlled parameters from addr, subject, query directly into IMAP protocol strings using f-string formatting with double-quote delimiters. An attacker w...

CVE-2026-15611: Improper Authentication

Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account...

PT-2026-64016

Logto allows unverified email-based SSO account linking, enabling an attacker to register an identity at a permissive IdP using a victim’s email and gain unauthorized access to the victim’s account...

CVE-2026-48530: Improper Neutralization of Input During Web Page Generation

GFI Archiver before 15.13 contains a stored cross-site scripting vulnerability in the Classification Rules configuration that allows authenticated attackers to inject arbitrary web script or HTML via the rule name and email criteria parameters to /Archiver/CategorizationPolicyWizard.aspx. The...

PT-2026-71919

Name of the Vulnerable Software and Affected Versions @auth/core versions prior to 0.41.3 next-auth versions prior to 4.24.15 next-auth versions prior to 5.0.0-beta.32 Description The defaultNormalizer used in the email and magic-link sign-in flow validates an email address before applying Unicod...

PT-2026-64027

Overseerr through 1.35.0 contains an authorization bypass through user-controlled key vulnerability in the push subscription API that allows authenticated users to list, read, and delete any other user's push subscriptions by supplying an arbitrary userId in the path parameters. Attackers can...

PT-2026-64021

Name of the Vulnerable Software and Affected Versions Logto affected versions not specified Description Logto performs principal lookup without normalizing email and identifier strings. This lack of normalization allows for principal collision, which can lead to unauthorized account access when...

Server-side Request Forgery (SSRF)

Overview n8n-nodes-base is a Base nodes of n8n Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via improper handling of message fields in the Send Email node. An attacker can access arbitrary files or initiate unauthorized network requests by supplying crafted...

n8n: Send Email Node Arbitrary File Read and SSRF via Nodemailer Content-Object Type Confusion

Impact The n8n Send Email node did not enforce that its message fields were strings, so a crafted untrusted non-string value from a workflow expression could be treated by the underlying mail library as a file path or URL. This could allow disclosure of local files on the n8n host. Exploitation...

NPM: n8n: Send Email Node Arbitrary File Read and SSRF via Nodemailer Content-Object Type Confusion

NPM: n8n: Send Email Node Arbitrary File Read and SSRF via Nodemailer Content-Object Type Confusion vulnerability discovered by ? in WordPress Npm n8n versions 1.123.67...

GHSA-2X35-3FW4-9JR4 n8n: Send Email Node Arbitrary File Read and SSRF via Nodemailer Content-Object Type Confusion

Impact The n8n Send Email node did not enforce that its message fields were strings, so a crafted untrusted non-string value from a workflow expression could be treated by the underlying mail library as a file path or URL. This could allow disclosure of local files on the n8n host. Exploitation...