When using an *ambient user* in a first transfer doing Negotiate authentication and asked to follow redirects, curl could pass on its credential details to an unrelated second origin when asked to redirect there.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:5069-1 advisory.

    - CVE-2026-8932: incomplete mTLS config matching in conn reuse (bsc#1268414).
    - CVE-2026-9546: sending old referer (bsc#1268419).
    - CVE-2026-11352: QUIC zero-length UDP datagrams busy-loop (bsc#1268423).
    - CVE-2026-11564: Native CA trust persist (bsc#1268424).
    - CVE-2026-11586: WS Auto-PONG memory exhaustion (bsc#1268425).
    - CVE-2026-11856: cross-origin Digest auth state leak (bsc#1268426).
    - CVE-2026-12064: proto-default skips SSH verification (bsc#1268427).
    - CVE-2026-18924: HTTP/2 server push UAF (bsc#1277477).
    - CVE-2026-19931: Negotiate ambient user conn reuse (bsc#1277478).
    - CVE-2026-80255: secure cookie attribute bypass with tab (bsc#1277482).
    - CVE-2026-82209: domain-scoped PSL domain cookie (bsc#1278173).
    - CVE-2026-86409: stale SigV4 headers sent unintended (bsc#1285031).
    - CVE-2026-86410: redirect to SFTP or SCP bypasses host verification (bsc#1285030).
    - CVE-2026-86411: FTP connection reuse inherits client-certificate (bsc#1285029).
    - CVE-2026-86412: server-set cookie erases cookie jar (bsc#1285028).
    - CVE-2026-86413: Negotiate credentials sent to redirected origin (bsc#1285027).
    - CVE-2026-86414: leaking host credentials to HTTP proxy (bsc#1285026).
    - CVE-2026-87861: cross-origin reuse of a Negotiate connection (bsc#1285024).
    - CVE-2026-87862: HSTS cache import drops longer-lived child (bsc#1285023).
    - CVE-2026-87863: HSTS response erases persisted entries (bsc#1285022).
    - CVE-2026-87864: IMAP APPEND plus CRLF conversion command injection (bsc#1285021).
    - CVE-2026-92386: server-set cookie aborts cookie jar load (bsc#1285018).
    - CVE-2026-92387: never-ending loop via server response omission (bsc#1285017).
    - CVE-2026-92388: FTP wildcard write callback mixup (bsc#1285016).
    - CVE-2026-92389: TFTP direction confusion (bsc#1285015).
    - CVE-2026-92390: -J no-clobber guarantee bypassed with 103 early hints (bsc#1285014).
    - CVE-2026-92391: curl_mime_free stack overflow by recursion (bsc#1285013).
    - CVE-2026-92392: HTTP/2 upload Use-After-Free (bsc#1285012).
    - CVE-2026-94265: Authorization: Negotiate sent to foreign origin (bsc#1285011).
    - CVE-2026-94266: password leak in CURLINFO_EFFECTIVE_URL (bsc#1285010).
    - CVE-2026-107929: local interface connection reuse mixup (bsc#1285008).

    Changes for curl:

    - Updated to version 8.22.0. (jsc#PED-16984)

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:5068-1 advisory.

    - CVE-2026-8932: incomplete mTLS config matching in conn reuse (bsc#1268414).
    - CVE-2026-9546: sending old referer (bsc#1268419).
    - CVE-2026-11352: QUIC zero-length UDP datagrams busy-loop (bsc#1268423).
    - CVE-2026-11564: Native CA trust persist (bsc#1268424).
    - CVE-2026-11586: WS Auto-PONG memory exhaustion (bsc#1268425).
    - CVE-2026-11856: cross-origin Digest auth state leak (bsc#1268426).
    - CVE-2026-12064: proto-default skips SSH verification (bsc#1268427).
    - CVE-2026-18924: HTTP/2 server push UAF (bsc#1277477).
    - CVE-2026-19931: Negotiate ambient user conn reuse (bsc#1277478).
    - CVE-2026-80255: secure cookie attribute bypass with tab (bsc#1277482).
    - CVE-2026-82209: domain-scoped PSL domain cookie (bsc#1278173).
    - CVE-2026-86409: stale SigV4 headers sent unintended (bsc#1285031).
    - CVE-2026-86410: redirect to SFTP or SCP bypasses host verification (bsc#1285030).
    - CVE-2026-86411: FTP connection reuse inherits client-certificate (bsc#1285029).
    - CVE-2026-86412: server-set cookie erases cookie jar (bsc#1285028).
    - CVE-2026-86413: Negotiate credentials sent to redirected origin (bsc#1285027).
    - CVE-2026-86414: leaking host credentials to HTTP proxy (bsc#1285026).
    - CVE-2026-87861: cross-origin reuse of a Negotiate connection (bsc#1285024).
    - CVE-2026-87862: HSTS cache import drops longer-lived child (bsc#1285023).
    - CVE-2026-87863: HSTS response erases persisted entries (bsc#1285022).
    - CVE-2026-87864: IMAP APPEND plus CRLF conversion command injection (bsc#1285021).
    - CVE-2026-92386: server-set cookie aborts cookie jar load (bsc#1285018).
    - CVE-2026-92387: never-ending loop via server response omission (bsc#1285017).
    - CVE-2026-92388: FTP wildcard write callback mixup (bsc#1285016).
    - CVE-2026-92389: TFTP direction confusion (bsc#1285015).
    - CVE-2026-92390: -J no-clobber guarantee bypassed with 103 early hints (bsc#1285014).
    - CVE-2026-92391: curl_mime_free stack overflow by recursion (bsc#1285013).
    - CVE-2026-92392: HTTP/2 upload Use-After-Free (bsc#1285012).
    - CVE-2026-94265: Authorization: Negotiate sent to foreign origin (bsc#1285011).
    - CVE-2026-94266: password leak in CURLINFO_EFFECTIVE_URL (bsc#1285010).
    - CVE-2026-107929: local interface connection reuse mixup (bsc#1285008).

    Changes for curl:

    - Updated curl to version 8.22.0. (jsc#PED-16984)

Tenable has extracted the preceding description block directly from the SUSE 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 multiple vulnerabilities referenced in the following CVEs:

  - During an upload, curl mishandles HTTP/2 `RST_STREAM` received from the server (with reason
    `HTTP_1_1_REQUIRED` or `REFUSED_STREAM`) leading to a use after free of a `struct Curl_easy` object.
    (CVE-2026-92392)

  - Setting `CURLOPT_AWS_SIGV4` to NULL but does not disable SigV4 authentication, contrary to expectations
    and documentation. A subsequent transfer on the same handle still sends an `Authorization: AWS4-HMAC-
    SHA256` header to whatever URL isset next, leaking state information. (CVE-2026-86409)

  - A flaw in the curl command line tool's logic makes it only set SSH host verification options when
    interacting directly using SFTP or SCP, and not as a result of following a redirect. (CVE-2026-86410)

  - An `ftp://` transfer configured with `CURLUSESSL_NONE` can reuse a pooled FTP control connection that a
    previous easy handle upgraded with `STARTTLS` and authenticated using a client certificate. The second
    handle performs neither a new TLS handshake nor a new FTP login, so the server continues to authorize it
    under the first handle's certificate identity. (CVE-2026-86411)

  - A remote HTTP server can set a cookie that curl accepts and writes to a Netscape cookie jar but cannot
    reload. On the next invocation using the same path for `--cookie` and `--cookie-jar`, curl fails before
    connecting, then the cleanup procedure replaces the jar with an empty file, deleting cookies for unrelated
    domains. (CVE-2026-86412)

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

  - When using an *ambient user* in a first transfer doing Negotiate authentication and asked to follow     redirects, curl could pass on its credential details to an unrelated second origin when asked to redirect     there. (CVE-2026-86413)

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

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 14dab969-c797-11f1-a6ea-8447094a420f advisory.

    The Curl project reports:

Tenable has extracted the preceding description block directly from the FreeBSD 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	Type	Severity
376286	SUSE SLES15 Security Update : curl (SUSE-SU-2026:5069-1)	Nessus	SuSE Local Security Checks	Local	critical
376257	SUSE SLED15 / SLES15 Security Update : curl (SUSE-SU-2026:5068-1)	Nessus	SuSE Local Security Checks	Local	critical
477458	Alpine: libcurl, multiple curl packages: security update to 8.23.0-r0	Tenable Cloud Security	Alpine Linux Local Security Checks	Local	critical
477458	Alpine: libcurl, multiple curl packages: security update to 8.23.0-r0	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	Local	critical
365686	Linux Distros Unpatched Vulnerability : CVE-2026-86413	Nessus	Misc.	Local	critical
365567	FreeBSD : Curl -- Multiple vulnerabilities (14dab969-c797-11f1-a6ea-8447094a420f)	Nessus	FreeBSD Local Security Checks	Local	critical

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