CVE-2026-72916

Mastodon CVE-2026-72916 affects PrivateAddressCheck.private_address? in app/lib/private_address_check.rb, which incorrectly normalized IPv4-mapped IPv6 addresses and did not recognize IPv4-compatible IPv6 addresses with IPAddr#ipv4_compat?. This allowed an attacker to bypass ALLOWED_PRIVATE_ADDRE...

EUVD-2026-55839

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, PrivateAddressCheck.privateaddress? in app/lib/privateaddresscheck.rb normalized IPv4-mapped IPv6 addresses but did not recognize IPv4-compatible IPv6 addresses with...

GHSA-H6X2-583H-X99R Open WebUI: DNS Rebinding SSRF Bypass

Summary Open WebUI vetted user-supplied URLs by resolving the hostname once and rejecting private, loopback and link-local addresses, then let the HTTP client resolve that hostname again at connect time. An attacker who controls the authoritative DNS for a hostname they submit can answer with a...

PT-2026-60386

Name of the Vulnerable Software and Affected Versions Koel versions prior to 9.7.1 Description An authenticated user can perform a server-side request forgery SSRF by subscribing to a malicious podcast RSS feed. The application's outbound-URL guard AppHelpersNetwork::isPublicHost uses filter var...

PYSEC-2026-2481 flyto-core has SSRF guard bypass via IPv6 transition addresses (IPv4-mapped / 6to4 / NAT64) in validate_url_ssrf

Summary flyto-core's SSRF protection validateurlssrf / isprivateip in src/core/utils.py blocks private and metadata destinations by resolving the host and testing the resulting IP for membership in a hardcoded PRIVATEIPRANGES list. That list contains only the native RFC 1918 / loopback / link-loc...

CVE-2026-45373 CodeWhale: SSRF‌ IPV6 bypass

CodeWhale is a DeepSeek + MiMo coding agent in terminal. Prior to 0.8.26, although SSRF is validated against hostnames that resolve to private IPv6 addresses, when providing the IPV6 in‌‌ URL‌ as http://::1, the SSRF defenses do not work. This vulnerability is fixed in 0.8.26...

EUVD-2026-32956

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev100, the PREREQFUNCTION-based private IP check was not applied to HTTPRequest used by the parseurls API. An authenticated attacker can supply a URL pointing to an attacker-controlled server that responds with...

MCP Registry has an unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist

Summary The Registry's HTTP-based namespace verification POST /v0/auth/http, POST /v0.1/auth/http uses safeDialContext internal/api/handlers/v0/auth/http.go:67-110 to refuse dialling private/internal addresses when fetching the well-known public-key file from a publisher-supplied domain. The...

ssrfcheck Vulnerable to Server-Side Request Forgery (SSRF) and Incomplete List of Disallowed Inputs

Summary ssrfcheck v1.3.0 latest fails to block Server-Side Request Forgery attacks when the target private IP address is encoded as an IPv4-mapped IPv6 address e.g. http://::ffff:127.0.0.1/. The WHATWG URL parser built into Node.js silently normalizes the IPv4 notation inside the brackets to...

GHSA-J4RJ-2JR5-M439 ssrfcheck Vulnerable to Server-Side Request Forgery (SSRF) and Incomplete List of Disallowed Inputs

Summary ssrfcheck v1.3.0 latest fails to block Server-Side Request Forgery attacks when the target private IP address is encoded as an IPv4-mapped IPv6 address e.g. http://::ffff:127.0.0.1/. The WHATWG URL parser built into Node.js silently normalizes the IPv4 notation inside the brackets to...

CVE-2025-65513

fetch-mcp v1.0.2 and before is vulnerable to Server-Side Request Forgery SSRF vulnerability, which allows attackers to bypass private IP validation and access internal network resources...

Server-side Request Forgery (SSRF)

Overview mcp-markdownify-server is a Model Context Protocol MCP server that converts various file types and web content to Markdown format. It provides a set of tools to transform PDFs, images, audio files, web pages, and more into easily readable and shareable Markdown text. Affected versions of...

PT-2025-50273

Name of the Vulnerable Software and Affected Versions fetch-mcp versions 1.0.2 and earlier Description The software is susceptible to a Server-Side Request Forgery SSRF issue. This allows attackers to circumvent private IP validation and gain access to internal network resources. Recommendations...