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

  - guzzlehttp/psr7 is a PSR-7 HTTP message library implementation in PHP. Versions prior to 2.10.2 did not     reject ASCII control characters, whitespace, or DEL in first-party URI host components. A vulnerable flow     is: First, an application accepts a user-controlled URL. Second, the URL is used to construct a PSR-7     `Uri` or `Request`. Third, the host component contains CRLF or another header-unsafe character. Fourth,     the host is copied into the PSR-7 `Host` header when no explicit `Host` header is provided. Finally, the     request is serialized or sent by an HTTP client that does not independently reject the malformed host. In     that flow, an attacker can cause the serialized request to contain additional attacker-controlled header     lines. For example, a host containing `\r\nX-Injected: yes` can cause the generated `Host` header to     span multiple HTTP header lines. Applications are affected when they use user-controlled URLs for outbound     HTTP requests, URL forwarding, proxying, crawling, webhook delivery, or similar request-dispatch flows. In     deployments involving HTTP/1.1 connection reuse, proxies, gateways, or load balancers, this malformed     request may also contribute to request smuggling or cache poisoning, depending on how downstream     components parse the request. The issue is patched in `2.10.2` and later. `1.x` is end-of-life and will     not receive a patch. As a workaround, validate and reject all untrusted URI strings before constructing     PSR-7 `Uri` or `Request` instances. Reject input containing ASCII control characters, whitespace, or DEL,     including CRLF, tab, space, NUL, or DEL characters. Applications that forward requests should also ensure     the final HTTP client or serializer rejects invalid URI and header data before writing requests to the     network. (CVE-2026-49214)

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Linux Distros Unpatched Vulnerability : CVE-2026-49214

medium Nessus Plugin ID 317996

Version 1.4