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

  - A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when
    using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
    (CVE-2026-80231)

An update of the curl package has been released.

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

  - A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup for a given hostname even when     using a different Native CA Store setting (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
    (CVE-2026-80231)

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

According to the versions of the curl packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent     handle is set to share connections with other handles, can lead to     use-after-free in the cleanup process.(CVE-2026-18924)

    Successfully using libcurl to do a transfer to a specific HTTP origin     (`hostA`) with **Digest** authentication and then changing the origin to a     different one (`hostB`) for a second transfer, reusing the same handle, makes     libcurl wrongly pass on the `Authorization:` header field meant for `hostA`,     to `hostB`.(CVE-2026-11856)

    When libpsl support is enabled, libcurl fails to enforce the Public Suffix     List boundary check when processing a `Set-Cookie` header where the `Domain`     attribute explicitly matches an origin host that is itself a public suffix     (e.g., `Domain=co.uk` set by `co.uk`).

    Instead of coercing it into a strict host-only cookie, libcurl saves the     cookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is     inappropriately included in subsequent outbound requests or HTTP redirects to     arbitrary sibling subdomains under the same public suffix (e.g.,     `attacker.co.uk`).(CVE-2026-82209)

    libcurl would reuse a previously created connection even when some mTLS config     related option had been changed that should have prohibited reuse.

    libcurl keeps previously used connections in a connection pool for subsequent     transfers to reuse if one of them matches the setup. However, some TLS     settings related to client certificates were left out from the configuration     match checks, making them match too easily. In particular options related to     the private key.(CVE-2026-8932)

    When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable     standard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and     `CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on     connections established without a presented server certificate. Bypassing the     pinning check under these disabled-verification conditions allows     unauthenticated connections to succeed when they should be rejected.(CVE-2026-80230)

    A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup     for a given hostname even when using a different Native CA Store setting     (`CURLSSLOPT_NATIVE_CA`) than when the connection was created.(CVE-2026-80231)

    A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given     hostname using Negotiate authentication, when the initial request is done     using empty credentials. This can make user B's request get sent over user A's     previously authenticated connection.(CVE-2026-19931)

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

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

ID	Name	Product	Family	Published	Updated	Severity
478412	Echo: curl-8.1.1: security update to 8.1.1+e2curl-8.17.0: security update to 8.17.0+e2curl-8.8.0: security update to 8.8.0+e2	Tenable Cloud Security	Echo Local Security Checks	11/5/2026	11/5/2026	high
478412	Echo: curl-8.1.1: security update to 8.1.1+e2curl-8.17.0: security update to 8.17.0+e2curl-8.8.0: security update to 8.8.0+e2	Tenable Self-Hosted Container Security	Echo Local Security Checks	11/5/2026	11/5/2026	high
375018	Photon OS 5.0: Curl PHSA-2026-5.0-90-1049	Nessus	PhotonOS Local Security Checks	11/2/2026	11/2/2026	critical
342584	Linux Distros Unpatched Vulnerability : CVE-2026-80231	Nessus	Misc.	9/3/2026	9/16/2026	high
376698	EulerOS 2.0 SP12 : curl (EulerOS-SA-2026-4474)	Nessus	Huawei Local Security Checks	11/6/2026	11/6/2026	critical
375012	Photon OS 5.0: Curl PHSA-2026-5.0-91-1008	Nessus	PhotonOS Local Security Checks	11/2/2026	11/2/2026	critical
375029	Photon OS 4.0: Curl PHSA-2026-4.0-1092	Nessus	PhotonOS Local Security Checks	11/2/2026	11/2/2026	critical
375119	Photon OS 5.0: Curl PHSA-2026-5.0-92-1008	Nessus	PhotonOS Local Security Checks	11/2/2026	11/2/2026	critical
376758	EulerOS 2.0 SP12 : curl (EulerOS-SA-2026-4397)	Nessus	Huawei Local Security Checks	11/6/2026	11/6/2026	critical

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