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.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2aa96a9ce5 advisory.

    ## Release 1.7.3

    - OAuth: Don't log an error when a refreshed token's TTL is below refresh_interval (#10213)
    - Fix out-of-bounds string reads on truncated compressed-RTF in the TNEF decoder (#10269)
    - Fix bug where searching in example_addressbook plugin was reporting zero results despite matches (#9022)
    - Fix vCard import mis-detecting folded continuation lines as BEGIN/END:VCARD (#9593)
    - Fix bug where the php session driver practically disabled session.lazy_write optimization (#9885,     #10248)
    - Fix bug where dates could get displayed shifted back one day in some places (#9403)
    - Fix regression where it wasn't possible to hide a skin logo image anymore (#10254)
    - Fix decoding of multi-segment RFC2231 extended attachment filenames (#10268)
    - Fix vCard import silently dropping properties with a non-item group prefix (#10271)
    - Fix so `REQUEST_URI` is used as a fallback if `PATH_INFO` is empty in static.php (#10181)
    - Security: Add basic validation for content proxied by the css proxy
    - Security: Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets
    - Security: Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url()     check
    - Security: Fix remote content blocking bypass via unclosed url() in a FuncIRI attribute
    - Security: Fix LDAP filter injection via unescaped %u/%fu/%d substitution into the `search_filter`
    - Security: Fix arbitrary Sieve script injection via a filter rule name bypassing     `managesieve_disabled_actions`
    - Security: Fix RCE via `cmd_learn` driver of markasjunk plugin
    - Security: Fix IMAP command injection via mail search and LITERAL+ byte-count desynchronization
    - Security: Fix password's modoboa driver leak of an authentication token to a user-controlled host
    - Security: Fix stored XSS in Add to address book action
    - Security: Fix HTML/CSS sanitization bypass via SVG animate `by` attribute



Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-914a40b4fd advisory.


    ## Release 1.6.18

    - Password: Fix fatal error Class 'Zxcvbn' not found (#10274)
    - Fix out-of-bounds string reads on truncated compressed-RTF in the TNEF decoder (#10269)
    - Security: Add basic validation for content proxied by the css proxy
    - Security: Fix SSRF bypass via specific local address URLs using 100.64.0.0/10 and fe80::/10 nets
    - Security: Fix SSRF filter bypass via various forms of nip.io/sslip.io hostnames evading is_local_url()     check
    - Security: Fix remote content blocking bypass via unclosed url() in a FuncIRI attribute
    - Security: Fix LDAP filter injection via unescaped %u/%fu/%d substitution into the `search_filter`
    - Security: Fix arbitrary Sieve script injection via a filter rule name bypassing     `managesieve_disabled_actions`
    - Security: Fix RCE via `cmd_learn` driver of markasjunk plugin
    - Security: Fix IMAP command injection via mail search and LITERAL+ byte-count desynchronization
    - Security: Fix password's modoboa driver leak of an authentication token to a user-controlled host
    - Security: Fix stored XSS in Add to address book action
    - Security: Fix HTML/CSS sanitization bypass via SVG animate `by` attribute



Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-ee50c21f92 advisory.

    33.0.6 Release

Tenable has extracted the preceding description block directly from the Fedora security advisory.

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-5afe6630dc advisory.

    33.0.6 Release

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus 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:

  - 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)

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)

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

ID	Name	Product	Family	Type	Severity
338391	Fedora 44 : roundcubemail (2026-2aa96a9ce5)	Nessus	Fedora Local Security Checks	Local	medium
338387	Fedora 43 : roundcubemail (2026-914a40b4fd)	Nessus	Fedora Local Security Checks	Local	medium
325136	Fedora 44 : nextcloud (2026-ee50c21f92)	Nessus	Fedora Local Security Checks	Local	high
325111	Fedora 43 : nextcloud (2026-5afe6630dc)	Nessus	Fedora Local Security Checks	Local	high
443078	SCA: security update for guzzlehttp/psr7 (GHSA-hq7v-mx3g-29hw)	Tenable Cloud Security	SCA Checks	Local	medium
443078	SCA: security update for guzzlehttp/psr7 (GHSA-hq7v-mx3g-29hw)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
317996	Linux Distros Unpatched Vulnerability : CVE-2026-49214	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-49214

medium

Tenable Plugins

medium

medium

high

high

medium

medium

medium