CVE-2026-47123 FreeScout: Agent Impersonation via Missing HMAC Verification on Notification Reply Message-ID Path

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to 1.8.220, the email processing pipeline in FreeScout's FetchEmails command has two code paths for identifying agent user replies based on In-Reply-To / References headers. The notification reply path...

CVE-2026-46579

OpenShift Router flaw: when Route.insecureEdgeTerminationPolicy is Allow, the HTTP frontend does not strip X-SSL-Client-* headers, enabling an unauthenticated attacker to craft requests that bypass mutual TLS authentication by impersonating client certificate identities. Affected component: OpenS...

CVE-2026-8890

code100x contains an authentication bypass vulnerability in the Mobile API that allows unauthenticated attackers to impersonate arbitrary users by supplying a crafted JSON payload in the 'g' HTTP header. The middleware in middleware.ts skips identity header generation when an Auth-Key header is...

CVE-2026-8890 code100x Mobile API Authentication Bypass via Header Spoofing

code100x contains an authentication bypass vulnerability in the Mobile API that allows unauthenticated attackers to impersonate arbitrary users by supplying a crafted JSON payload in the 'g' HTTP header. The middleware in middleware.ts skips identity header generation when an Auth-Key header is...

CVE-2026-8890 code100x Mobile API Authentication Bypass via Header Spoofing

code100x contains an authentication bypass vulnerability in the Mobile API that allows unauthenticated attackers to impersonate arbitrary users by supplying a crafted JSON payload in the 'g' HTTP header. The middleware in middleware.ts skips identity header generation when an Auth-Key header is...

CVE-2026-8890

The CVE-2026-8890 entry affects code100x Mobile API. The vulnerability is an authentication bypass in the Mobile API’s middleware.ts: when an Auth-Key header is present but not validated, an attacker can inject a crafted JSON payload in the g header, spoofing a user identity that downstream handl...

Mattermost Server 10.11.x <= 10.11.13 / 11.5.x <= 11.5.1 Multiple Vulnerabilities (MMSA-2026-00570 / MMSA-2026-00575 / MMSA-2026-00582 / MMSA-2026-00622)

The version of Mattermost Server installed on the remote host is affected by multiple vulnerabilities: - Mattermost fails to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an...

PT-2026-44143

Name of the Vulnerable Software and Affected Versions Symfony version 7.4 affected versions not specified Description The Cas2Handler builds the service parameter using Request::getSchemeAndHttpHost, which reflects the HTTP Host header when the framework.trusted hosts setting is not configured...

Fedora 44 : python-django5 (2026-9b7a6474a1)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-9b7a6474a1 advisory. - Fixes CVE-2026-5766: Potential denial-of-service vulnerability in ASGI requests via file upload limit bypass - Fixes CVE-2026-35192: Session...

Fedora 44 : python-django6 (2026-de6e24ae07)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-de6e24ae07 advisory. - Fixes CVE-2026-5766: Potential denial-of-service vulnerability in ASGI requests via file upload limit bypass - Fixes CVE-2026-35192: Session...

PT-2026-41935

Name of the Vulnerable Software and Affected Versions HestiaCP versions 1.2.0 through 1.9.4 Description An IP spoofing issue allows unauthenticated remote attackers to bypass authentication security controls. This occurs when the system accepts an arbitrary IP address provided in the...

CVE-2026-6333 SSRF via Host Header Spoofing in Custom Slash Commands

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

CVE-2026-6333 SSRF via Host Header Spoofing in Custom Slash Commands

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

CVE-2026-6333 SSRF via Host Header Spoofing in Custom Slash Commands

Mattermost versions 11.5.x = 11.5.1, 10.11.x = 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost...

User Impersonation

Overview Affected versions of this package are vulnerable to User Impersonation due to the reliance on client-supplied IP address headers such as X-Forwarded-For, X-Real-IP, and True-Client-IP. An attacker can circumvent per-IP rate limiting by supplying arbitrary values in these headers, causing...

CVE-2026-46356 Fleet: IP spoofing allows bypassing API rate limiting

Fleet is open source device management software. Prior to version 4.80.1, a vulnerability in Fleet's IP extraction logic allows unauthenticated attackers to bypass API rate limiting by spoofing client IP headers. This may allow brute-force login attempts or other abuse against Fleet instances...

CVE-2026-24000

Fleet is open-source device management software. A vulnerability in versions prior to 4.80.1 lets attackers spoof the client’s apparent IP by abusing unvalidated headers (X-Forwarded-For, X-Real-IP, True-Client-IP) to bypass per-IP rate limiting. This affects how Fleet determines a client’s publi...

CVE-2026-24000 Fleet has a rate limiting bypass via untrusted client IP headers

Fleet is open source device management software. Prior to version 4.80.1, Fleet trusted client-supplied IP address headers when determining the source IP for incoming requests. This allowed authenticated and unauthenticated clients to spoof their apparent IP address and bypass per-IP rate limitin...

CVE-2026-8621 Crabbox < v0.12.0 Authentication Bypass via Header Spoofing

Crabbox prior to v0.12.0 contains an authentication bypass vulnerability that allows non-admin shared-token callers to impersonate other owners or organizations by spoofing identity headers. Attackers can inject malicious X-Crabbox-Owner and X-Crabbox-Org headers in requests authenticated with a...

CVE-2026-8621 Crabbox < v0.12.0 Authentication Bypass via Header Spoofing

Crabbox prior to v0.12.0 contains an authentication bypass vulnerability that allows non-admin shared-token callers to impersonate other owners or organizations by spoofing identity headers. Attackers can inject malicious X-Crabbox-Owner and X-Crabbox-Org headers in requests authenticated with a...