cpython: email header injection due to unquoted newlines

A flaw was found in the email module in the Python standard library. When serializing an email message, the BytesGenerator class fails to properly quote newline characters for email headers. This issue is exploitable when the LiteralHeader class is used as it does not respect email folding rules,...

CVE-2026-29794

Vikunja is an open-source self-hosted task management platform. Starting in version 0.8 and prior to version 2.2.0, unauthenticated users are able to bypass the application's built-in rate-limits by spoofing the X-Forwarded-For or X-Real-IP headers due to the rate-limit relying on the value of...

Vikunja has a Rate-Limit Bypass for Unauthenticated Users via Spoofed Headers

Summary Unauthenticated users are able to bypass the application's built-in rate-limits by spoofing the X-Forwarded-For or X-Real-IP headers due to the rate-limit relying on the value of echo.Context.RealIP. Details In the first file below, the rate-limit for unauthenticated users can be observed...

CVE-2026-33131

H3 is a minimal HTTP framework. Versions 2.0.0-0 through 2.0.1-rc.14 contain a Host header spoofing vulnerability in the NodeRequestUrl which extends FastURL which allows middleware bypass. When event.url, event.url.hostname, or event.url.url is accessed, such as in a logging middleware, the url...

CVE-2026-33131

H3 is a minimal HTTP framework. Versions 2.0.0-0 through 2.0.1-rc.14 contain a Host header spoofing vulnerability in the NodeRequestUrl which extends FastURL which allows middleware bypass. When event.url, event.url.hostname, or event.url.url is accessed, such as in a logging middleware, the url...

CVE-2026-33131

CVE-2026-33131 affects H3, a minimal HTTP framework. Versions 2.0.0-0 through 2.0.1-rc.14 expose a Host header spoofing flaw in the NodeRequestUrl/FastURL path, enabling middleware bypass when an attacker manipulates event.url properties (e.g., via Host header) so route matching succeeds but auth...

CVE-2026-33131 h3 has a middleware bypass with one gadget

H3 is a minimal HTTP framework. Versions 2.0.0-0 through 2.0.1-rc.14 contain a Host header spoofing vulnerability in the NodeRequestUrl which extends FastURL which allows middleware bypass. When event.url, event.url.hostname, or event.url.url is accessed, such as in a logging middleware, the url...

CVE-2026-33131 h3 has a middleware bypass with one gadget

H3 is a minimal HTTP framework. Versions 2.0.0-0 through 2.0.1-rc.14 contain a Host header spoofing vulnerability in the NodeRequestUrl which extends FastURL which allows middleware bypass. When event.url, event.url.hostname, or event.url.url is accessed, such as in a logging middleware, the url...

CVE-2026-33131 h3 has a middleware bypass with one gadget

H3 is a minimal HTTP framework. Versions 2.0.0-0 through 2.0.1-rc.14 contain a Host header spoofing vulnerability in the NodeRequestUrl which extends FastURL which allows middleware bypass. When event.url, event.url.hostname, or event.url.url is accessed, such as in a logging middleware, the url...

CVE-2026-32881

Summary: CVE-2026-32881 affects the Gleam web server “ewe.” Versions 0.6.0–3.0.4 are vulnerable to an authentication bypass and header spoofing due to how trailer headers are merged into req.headers after body parsing. The denylist in the trailer handling only blocks nine header names, allowing a...

CVE-2026-32881 ewe has an Overly Permissive List of Allowed Inputs

ewe is a Gleam web server. ewe is a Gleam web server. Versions 0.6.0 through 3.0.4 are vulnerable to authentication bypass or spoofed proxy-trust headers. Chunked transfer encoding trailer handling merges declared trailer fields into req.headers after body parsing, but the denylist only blocks 9...

PT-2026-26621

Name of the Vulnerable Software and Affected Versions Vikunja versions 0.8 through 2.1.9 Description Vikunja, an open-source self-hosted task management platform, contains a flaw where unauthenticated users can circumvent the application's rate limits. This bypass is achieved by manipulating the...

H3 安全漏洞

H3 is an open-source HTTP framework developed by H3. Versions 2.0.0-0 to 2.0.1-rc.14 of H3 contain security vulnerabilities. These vulnerabilities stem from a Host header spoofing issue in NodeRequestUrl, which may allow middleware to bypass security checks...

CVE-2026-32029 OpenClaw < 2026.2.21 - Client IP Spoofing via X-Forwarded-For Header Parsing

OpenClaw versions prior to 2026.2.21 improperly parse the left-most X-Forwarded-For header value when requests originate from configured trusted proxies, allowing attackers to spoof client IP addresses. In proxy chains that append or preserve header values, attackers can inject malicious header...

CVE-2026-32029

OpenClaw is affected in versions prior to 2026.2.21 where parsing of the left-most X-Forwarded-For header from trusted proxies can be spoofed. This allows attackers to influence security decisions that rely on client IP information, including authentication rate-limiting and IP-based access contr...

Origin Validation Error

Overview pyload-ng is a The free and open-source Download Manager written in pure Python Affected versions of this package are vulnerable to Origin Validation Error via the @localcheck decorator. An attacker can gain unauthorized access to restricted API endpoints by spoofing the Host header in...

Improper Authentication and Origin Validation Error in pyload-ng

Summary A Host Header Spoofing vulnerability in the @localcheck decorator allows unauthenticated external attackers to bypass local-only restrictions. This grants access to the Click'N'Load API endpoints, enabling attackers to remotely queue arbitrary downloads, leading to Server-Side Request...

GHSA-Q485-CG9Q-XQ2R Improper Authentication and Origin Validation Error in pyload-ng

Summary A Host Header Spoofing vulnerability in the @localcheck decorator allows unauthenticated external attackers to bypass local-only restrictions. This grants access to the Click'N'Load API endpoints, enabling attackers to remotely queue arbitrary downloads, leading to Server-Side Request...

cpython: email header injection due to unquoted newlines

A flaw was found in the email module in the Python standard library. When serializing an email message, the BytesGenerator class fails to properly quote newline characters for email headers. This issue is exploitable when the LiteralHeader class is used as it does not respect email folding rules,...

EUVD-2025-208707

Raytha CMS allows an attacker to spoof X-Forwarded-Host or Host headers to attacker controlled domain. The attacker who knows the victim's email address can force the server to send an email with password reset link pointing to the domain from spoofed header. When victim clicks the link, browser...