mcp-sanitizer: URL sanitizer allows localhost/IPv6 loopback SSRF bypass via explicit port or bracketed IPv6

URL sanitizer allows localhost/IPv6 loopback SSRF bypass via explicit port or bracketed IPv6 Summary mcp-sanitizer v1.3.3 fails to block Server-Side Request Forgery SSRF targets when a localhost URL includes an explicit port e.g., http://localhost:8080/ or when an IPv6 loopback/link-local address...

CVE-2026-118376

WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via webfetch or URL-based knowledge import to reach...

EUVD-2026-111552

WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via webfetch or URL-based knowledge import to reach...

CVE-2026-118376 WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses

WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via webfetch or URL-based knowledge import to reach...

CVE-2026-118376 WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses

WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via webfetch or URL-based knowledge import to reach...

CVE-2026-118376

The WeKnora software (versions prior to 0.8.2 ) contains a server-side request forgery (SSRF) vulnerability in the isRestrictedIP() function. The root cause is the misclassification of NAT64-prefixed IPv6 addresses as public addresses. This allows authenticated attackers to provide URLs that reso...

CVE-2026-118376 WeKnora before 0.8.2 SSRF Guard Bypass via NAT64 IPv6 Addresses

WeKnora before 0.8.2 contains a server-side request forgery vulnerability in isRestrictedIP that misclassifies NAT64-prefixed IPv6 addresses as public. Authenticated attackers can supply URLs resolving to NAT64 encodings of internal addresses via webfetch or URL-based knowledge import to reach...

PYSEC-2026-4280 Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl

Summary Several remote-content download paths in Pydantic AI buffered the entire HTTP response body into memory before enforcing any size limit. An application that exposes the local web-fetch tool webfetchtool, or the WebFetch capability's local fallback to untrusted prompts can be driven to fet...

PYSEC-2026-4289 Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl

Summary Several remote-content download paths in Pydantic AI buffered the entire HTTP response body into memory before enforcing any size limit. An application that exposes the local web-fetch tool webfetchtool, or the WebFetch capability's local fallback to untrusted prompts can be driven to fet...

Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl

SummarySeveral remote-content download paths in Pydantic AI buffered the entire HTTP response body into memory before enforcing any size limit. An application that exposes the local web-fetch tool webfetchtool, or the WebFetch capability's local fallback to untrusted prompts can be driven to fetc...

Pydantic AI: Event loop blocked by quadratic title extraction in `web_fetch`

SummaryThe local web-fetch tool webfetchtool, also used as the WebFetch capability's local fallback processed responses with several steps whose running time grows quadratically with the size of certain server-controlled inputs, and ran them on the event loop: decoding the body with whichever...

GHSA-V2XH-2VP8-57H8 Pydantic AI: Unbounded memory use when downloading remote content via web_fetch or FileUrl

Summary Several remote-content download paths in Pydantic AI buffered the entire HTTP response body into memory before enforcing any size limit. An application that exposes the local web-fetch tool webfetchtool, or the WebFetch capability's local fallback to untrusted prompts can be driven to fet...

Allocation of Resources Without Limits or Throttling

Overview pydantic-ai-slim is an Agent Framework / shim to use Pydantic with LLMs, slim package Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the safedownload function in pydanticai/ssrf.py and the webfetch common tool, which impose no...

Allocation of Resources Without Limits or Throttling

Overview pydantic-ai is an AI Agent Framework, the Pydantic way Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the safedownload function in pydanticai/ssrf.py and the webfetch common tool, which impose no upper bound on HTTP response...

Regular Expression Denial of Service (ReDoS)

Overview pydantic-ai is an AI Agent Framework, the Pydantic way Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the webfetch tool in pydanticai/commontools/webfetch.py, where response body decoding is performed synchronously on the event loop usi...

Regular Expression Denial of Service (ReDoS)

Overview pydantic-ai-slim is an Agent Framework / shim to use Pydantic with LLMs, slim package Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the webfetch tool in pydanticai/commontools/webfetch.py, where response body decoding is performed...

EUVD-2026-95093

Pydantic AI is a Python agent framework for building applications and workflows with Generative AI. From 1.77.0 until 1.107.6 and 2.44.0, the local webfetchtool and the WebFetch local fallback process server-controlled responses with quadratic title extraction, whitespace normalization, and...

CVE-2026-82234

SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the httprequest and webfetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to answer the guard resolution with a public...

CVE-2026-82234 SiYuan before v3.8.1 SSRF via DNS-Rebinding TOCTOU

SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the httprequest and webfetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to answer the guard resolution with a public...

EUVD-2026-67686

SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the httprequest and webfetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to answer the guard resolution with a public...