Impact: fast-uri versions from 2.3.1 through 4.1.0 (including the 3.x line up to 3.1.3 and the 2.x line up to 2.4.2) do not treat a literal backslash character (U+005C) as an authority delimiter. Node's native WHATWG URL parser, used by fetch, undici, and Node's http and https clients, normalizes the backslash to a forward slash for special schemes such as http, https, ws, wss, ftp, and file. As a result, the two parsers extract different hosts from the same input string. Applications that use fast-uri to enforce host-based policy such as allowlists, denylists, loopback or SSRF filtering, redirect validation, or outbound proxy routing before passing the same URL into Node's URL or fetch consumers can be steered to an unintended destination, including cloud metadata endpoints, loopback, or internal hosts. Patches: upgrade to fast-uri 4.1.1, 3.1.4, or 2.4.3. Workarounds: none.

According to its self-reported version number, the Atlassian Jira application running on the remote host is prior to 10.3.25 or 10.4.x prior to 11.3.11. It is, therefore, affected by multiple vulnerabilities, including flaws in bundled third-party dependencies :

- Multiple broken authentication and session management vulnerabilities in the bundled Bouncy Castle dependency. (CVE-2026-8763, CVE-2026-12803, CVE-2026-12802, CVE-2026-12816, CVE-2026-59642, CVE-2026-59639)

- An injection vulnerability in the bundled Bouncy Castle dependency. (CVE-2026-59650)

- Multiple broken authentication and session management vulnerabilities in the bundled Apache Tomcat dependency. (CVE-2026-53434, CVE-2026-55276, CVE-2026-53404)

- An injection vulnerability in the bundled json5 dependency. (CVE-2022-46175)

- Multiple denial of service vulnerabilities in the bundled Apache Tomcat dependency. (CVE-2026-58059, CVE-2026-13506, CVE-2026-68763)

- Multiple cross-site scripting (XSS) vulnerabilities in the bundled tinymce dependency. (CVE-2026-47761, CVE-2026-47759, CVE-2026-47762)

- Multiple remote code execution vulnerabilities in the bundled Bouncy Castle dependency. (CVE-2026-14682, CVE-2026-58060)

- Multiple denial of service vulnerabilities in the bundled Immutable.js dependency. (CVE-2026-59880, CVE-2026-59879)

- An information disclosure vulnerability in the bundled axios dependency. (CVE-2026-67320)

- A remote code execution vulnerability in the bundled @babel/plugin-transform-modules-systemjs dependency. (CVE-2026-44728)

- A denial of service vulnerability in the bundled nanoid dependency. (CVE-2026-67214)

- A broken authentication and session management vulnerability in the bundled jackson-databind dependency. (CVE-2026-54513)

- A denial of service vulnerability in the bundled jackson-databind dependency. (CVE-2026-54512)

- A denial of service vulnerability in the bundled Netty dependency. (CVE-2026-73507)

- Multiple server-side request forgery (SSRF) vulnerabilities in the bundled fast-uri dependency. (CVE-2026-75899, CVE-2026-75975, CVE-2026-76172)

- Multiple denial of service vulnerabilities in the bundled browserslist dependency. (CVE-2026-73088, CVE-2026-73089)

- A denial of service vulnerability in the bundled js-yaml dependency. (CVE-2026-59869)

- Multiple denial of service vulnerabilities in the bundled brace-expansion dependency. (CVE-2026-14257, CVE-2026-69152)

- A file inclusion vulnerability in the bundled postcss dependency. (CVE-2026-73646)

- Multiple injection vulnerabilities in the bundled fast-uri dependency. (CVE-2026-13676, CVE-2026-16221, CVE-2026-18446)

- A denial of service vulnerability in the bundled node-tar dependency. (CVE-2026-73566)

- A cross-site request forgery (CSRF) vulnerability in the bundled nanoid dependency. (CVE-2026-73086)

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Impact: fast-uri versions from 2.3.1 through 4.1.0 (including the 3.x line up to 3.1.3 and the 2.x line up
    to 2.4.2) do not treat a literal backslash character (U+005C) as an authority delimiter. Node's native
    WHATWG URL parser, used by fetch, undici, and Node's http and https clients, normalizes the backslash to a
    forward slash for special schemes such as http, https, ws, wss, ftp, and file. As a result, the two
    parsers extract different hosts from the same input string. Applications that use fast-uri to enforce
    host-based policy such as allowlists, denylists, loopback or SSRF filtering, redirect validation, or
    outbound proxy routing before passing the same URL into Node's URL or fetch consumers can be steered to an
    unintended destination, including cloud metadata endpoints, loopback, or internal hosts. Patches: upgrade
    to fast-uri 4.1.1, 3.1.4, or 2.4.3. Workarounds: none. (CVE-2026-16221)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Impact: fast-uri versions from 2.3.1 through 4.1.0 (including the 3.x line up to 3.1.3 and the 2.x line up     to 2.4.2) do not treat a literal backslash character (U+005C) as an authority delimiter. Node's native     WHATWG URL parser, used by fetch, undici, and Node's http and https clients, normalizes the backslash to a     forward slash for special schemes such as http, https, ws, wss, ftp, and file. As a result, the two     parsers extract different hosts from the same input string. Applications that use fast-uri to enforce     host-based policy such as allowlists, denylists, loopback or SSRF filtering, redirect validation, or     outbound proxy routing before passing the same URL into Node's URL or fetch consumers can be steered to an     unintended destination, including cloud metadata endpoints, loopback, or internal hosts. Patches: upgrade     to fast-uri 4.1.1, 3.1.4, or 2.4.3. Workarounds: none. (CVE-2026-16221)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
115698	Atlassian Jira 10.4.x < 11.3.11 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	critical
115697	Atlassian Jira < 10.3.25 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	critical
465201	Echo: fast-uri: security update to 3.1.2+echo.1	Tenable Cloud Security	Echo Local Security Checks	Local	high
465201	Echo: fast-uri: security update to 3.1.2+echo.1	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
445032	SCA: security update for fast-uri (GHSA-v2hh-gcrm-f6hx)	Tenable Cloud Security	SCA Checks	Local	high
445032	SCA: security update for fast-uri (GHSA-v2hh-gcrm-f6hx)	Tenable Self-Hosted Container Security	SCA Checks	Local	high
328008	Linux Distros Unpatched Vulnerability : CVE-2026-16221	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-16221

high

Tenable Plugins

critical

critical

high

high

high

high

high