PT-2026-103523

Name of the Vulnerable Software and Affected Versions garycourt uri-js versions prior to 4.4.2 Description A weakness in the Mailto Header Handler component allows a remote attacker to cause an uncaught exception. This occurs through the manipulation of arguments passed to the URI.parse function...

AlmaLinux 9.2 [TuxCare] Security Update: xdg-utils Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2025:1751913634)

The AlmaLinux 9.2 host has a package installed that is affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2025:1751913634 advisory. - A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows...

NPM: fast-uri vulnerable to mailto header injection via percent-encoded field-name desynchronization

NPM: fast-uri vulnerable to mailto header injection via percent-encoded field-name desynchronization vulnerability discovered by ? in WordPress Npm fast-uri versions = 4.1.3, 4.1.5...

EUVD-2026-78403

fast-uri vulnerable to mailto header injection via percent-encoded field-name desynchronization...

fast-uri vulnerable to mailto header injection via percent-encoded field-name desynchronization

Impact fast-uri's mailto scheme parser compares each query field name to the reserved names to, subject, body while the name is still percent-encoded, and only percent-decodes it when storing it as a generic header. On serialize, the decoded name is re-emitted, so a field name such as %74o...

Encoding Error

Overview fast-uri is a Dependency-free RFC 3986 URI toolbox Affected versions of this package are vulnerable to Encoding Error in the mailto parser process. An attacker can inject unauthorized recipients or manipulate the subject and body fields by crafting a URI with percent-encoded reserved fie...

CVE-2026-86818

A flaw was found in fast-uri, a Node.js URI parser. In versions 4.1.3 and 4.1.4, the mailto parser incorrectly handles percent-encoded query field names. This desynchronization between parsing and serialization allows an attacker to inject arbitrary recipients, subjects, or body content into mail...

DEBIAN-CVE-2026-86818

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 and 4.1.4, the mailto parser compares each query field name to the reserved names to, subject, and body while the name is still...

CVE-2026-86818

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 and 4.1.4, the mailto parser compares each query field name to the reserved names to, subject, and body while the name is still...

CVE-2026-86818 fast-uri vulnerable to mailto header injection via percent-encoded field-name desynchronization

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 and 4.1.4, the mailto parser compares each query field name to the reserved names to, subject, and body while the name is still...

CVE-2026-86818 fast-uri vulnerable to mailto header injection via percent-encoded field-name desynchronization

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 and 4.1.4, the mailto parser compares each query field name to the reserved names to, subject, and body while the name is still...

CVE-2026-86818

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 and 4.1.4, the mailto parser compares each query field name to the reserved names to, subject, and body while the name is still...

CVE-2026-86818 fast-uri vulnerable to mailto header injection via percent-encoded field-name desynchronization

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 and 4.1.4, the mailto parser compares each query field name to the reserved names to, subject, and body while the name is still...

CVE-2026-86818

fast-uri v4.1.3–4.1.4, a dependency-free RFC 3986 URI parser for Node.js used by Fastify and ajv , suffers from a percent-encoded field-name desynchronization in its mailto parser. At parse time, reserved field names (to, subject, body) are compared in their still-percent-encoded form and thus no...

Inappropriate Encoding for Output Context

Overview fast-uri is a Dependency-free RFC 3986 URI toolbox Affected versions of this package are vulnerable to Inappropriate Encoding for Output Context in the mailto parser when handling percent-encoded query field names. An attacker can manipulate email recipients, subjects, or body content by...

CVE-2026-86818: Encoding Error

fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 and 4.1.4, the mailto parser compares each query field name to the reserved names to, subject, and body while the name is still...

Linux Distros Unpatched Vulnerability : CVE-2026-86818

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - fast-uri is a dependency-free RFC 3986 URI parser for Node.js, used by Fastify and ajv, that added a mailto scheme parser in version 4.1.3. In versions 4.1.3 an...

PT-2026-91923

Name of the Vulnerable Software and Affected Versions fast-uri versions 4.1.3 through 4.1.4 Description The mailto parser compares query field names to reserved names such as to, subject, and body while they are still percent-encoded. Because the parser only decodes these names when storing them ...

DoS (Denial of Service) linkify-it Dependency in Jira Service Management Data Center

This High severity DoS Denial of Service vulnerability was introduced in versions 11.1.0, 11.2.0, and 11.3.0 of Jira Service Management Data Center. This DoS Denial of Service vulnerability, with a CVSS Score of 7.5 and a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H allows an...

Unity Linux 20.1050e / 20.1060e / 20.1070-8ae / 20.1070e Security Update: xdg-utils (UTSA-2025-002294)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-002294 advisory. A flaw was found in the xdg-email component of xdg-utils-1.1.0-rc1 and newer. When handling mailto: URIs, xdg-email allows attachments to be discreetly added via the...