CVE-2026-34742

A flaw was found in the Model Context Protocol MCP Go SDK. When an HTTP-based MCP server is run on localhost without authentication, a malicious website can exploit a DNS rebinding vulnerability. This allows the attacker to bypass same-origin policy restrictions and send requests to the local MCP...

CVE-2026-34742

The Go MCP SDK used Go's standard encoding/json. Prior to version 1.4.0, the Model Context Protocol MCP Go SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPHandler or...

CVE-2026-34742

The Go MCP SDK used Go's standard encoding/json. Prior to version 1.4.0, the Model Context Protocol MCP Go SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPHandler or...

CVE-2026-34742

The CVE-2026-34742 entry concerns the Model Context Protocol (MCP) Go SDK. Prior to version 1.4.0, an HTTP-based MCP server running on localhost without authentication did not enable DNS rebinding protection by default, allowing a malicious website to bypass same-origin policy and send requests t...

DNS Rebinding Protection Disabled by Default in Model Context Protocol Go SDK for Servers Running on Localhost

The Model Context Protocol MCP Go SDK does not enable DNS rebinding protection by default for HTTP-based servers. When an HTTP-based MCP server is run on localhost without authentication with StreamableHTTPHandler or SSEHandler, a malicious website could exploit DNS rebinding to bypass same-origi...

PT-2026-29672

Name of the Vulnerable Software and Affected Versions Go MCP SDK versions prior to 1.4.0 Description The Go MCP SDK, utilizing Go's standard encoding/json, did not enable DNS rebinding protection by default for HTTP-based servers prior to version 1.4.0. When an HTTP-based MCP server was run on...

CVE-2026-33644

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in PhotoUrlRule.php can be bypassed using DNS rebinding. The IP validation check line 86-89 only activates when the hostname is an IP address. When a domain name is used, filtervar$host,...

EUVD-2026-16374

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in PhotoUrlRule.php can be bypassed using DNS rebinding. The IP validation check line 86-89 only activates when the hostname is an IP address. When a domain name is used, filtervar$host,...

CVE-2026-33644 Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in PhotoUrlRule.php can be bypassed using DNS rebinding. The IP validation check line 86-89 only activates when the hostname is an IP address. When a domain name is used, filtervar$host,...

CVE-2026-33644 Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in PhotoUrlRule.php can be bypassed using DNS rebinding. The IP validation check line 86-89 only activates when the hostname is an IP address. When a domain name is used, filtervar$host,...

CVE-2026-33644

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in PhotoUrlRule.php can be bypassed using DNS rebinding. The IP validation check line 86-89 only activates when the hostname is an IP address. When a domain name is used, filtervar$host,...

CVE-2026-33644 Lychee has SSRF bypass via DNS rebinding — PhotoUrlRule only validates IP addresses, not hostnames resolving to internal IPs

Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the SSRF protection in PhotoUrlRule.php can be bypassed using DNS rebinding. The IP validation check line 86-89 only activates when the hostname is an IP address. When a domain name is used, filtervar$host,...

PT-2026-28504

Name of the Vulnerable Software and Affected Versions Lychee versions prior to 7.5.2 Description Lychee is a free, open-source photo-management tool. Prior to version 7.5.2, the Server-Side Request Forgery SSRF protection in PhotoUrlRule.php could be bypassed using DNS rebinding. The IP validatio...

GHSA-Q537-8FR5-CW35 Activitypub-Federation has SSRF via 0.0.0.0 bypass in activitypub-federation-rust v4_is_invalid()

Summary The v4isinvalid function in activitypub-federation-rust src/utils.rs does not check for Ipv4Addr::UNSPECIFIED 0.0.0.0. An unauthenticated attacker controlling a remote domain can point it to 0.0.0.0, bypass the SSRF protection introduced by the fix for CVE-2025-25194 GHSA-7723-35v7-qcxw,...

Activitypub-Federation has SSRF via 0.0.0.0 bypass in activitypub-federation-rust v4_is_invalid()

Summary The v4isinvalid function in activitypub-federation-rust src/utils.rs does not check for Ipv4Addr::UNSPECIFIED 0.0.0.0. An unauthenticated attacker controlling a remote domain can point it to 0.0.0.0, bypass the SSRF protection introduced by the fix for CVE-2025-25194 GHSA-7723-35v7-qcxw,...

📄 Starlink DNS Rebinding

This Metasploit auxiliary module implements a DNS rebinding attack targeting Starlink infrastructure CVE-2023-52235. The module operates by running a malicious DNS server that dynamically switches responses from a public IP to internal network targets, enabling access to internal services. It als...

CVE-2026-33002

A flaw was found in Jenkins. A remote attacker could exploit a vulnerability in the origin validation of requests made through the Command Line Interface CLI WebSocket endpoint. By manipulating the Host or X-Forwarded-Host HTTP headers, an attacker can perform Domain Name System DNS rebinding...

DNS Rebinding

Overview org.jenkins-ci.main:jenkins-core is an open source automation server. Affected versions of this package are vulnerable to DNS Rebinding in the origin validation process for WebSocket CLI requests due to reliance on the Host or X-Forwarded-Host HTTP headers. An attacker can bypass origin...

GHSA-PHHV-63FH-RRC8 Jenkins has a DNS rebinding vulnerability in WebSocket CLI origin validation

Jenkins 2.442 through 2.554 both inclusive, LTS 2.426.3 through LTS 2.541.2 both inclusive performs origin validation of requests made through the CLI WebSocket endpoint by computing the expected origin for comparison using the Host or X-Forwarded-Host HTTP request headers, making it vulnerable t...

Jenkins has a DNS rebinding vulnerability in WebSocket CLI origin validation

Jenkins 2.442 through 2.554 both inclusive, LTS 2.426.3 through LTS 2.541.2 both inclusive performs origin validation of requests made through the CLI WebSocket endpoint by computing the expected origin for comparison using the Host or X-Forwarded-Host HTTP request headers, making it vulnerable t...