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OpenAdvisories
High RHSA-2026:6893 13 CVEs

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Published Apr 20, 2026 · Updated Oct 16, 2026

Ecosystem: Red Hat

Fixed packages 4

ReleasePackageFixed in
Red Hat · Hardened Images 1 hummingbird:1 curl 0:8.19.0-3.hum1
Red Hat · Hardened Images 1 hummingbird:1 libcurl 0:8.19.0-3.hum1
Red Hat · Hardened Images 1 hummingbird:1 libcurl-devel 0:8.19.0-3.hum1
Red Hat · Hardened Images 1 hummingbird:1 libcurl-minimal 0:8.19.0-3.hum1

Vulnerabilities 13

  • High 7.5
    CVE-2025-9086

    Out of bounds read for cookie path

    1. A cookie is set using the `secure` keyword for `https://target` 2. curl is redirected to or otherwise made to speak with `http://target` (same hostname, but using clear text HTTP) using the same cookie set 3. The same cookie name is set - but with only a s…

    curl curl curl curl Debian Ubuntu Alpine
  • High 7.5
    CVE-2026-3805 Public exploit

    use after free in SMB connection reuse

    When doing a second SMB request to the same host again, curl would wrongly use a data pointer pointing into already freed memory.

    curl curl curl curl Debian Ubuntu Alpine
  • Medium 6.5
    CVE-2026-1965

    bad reuse of HTTP Negotiate connection

    libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When …

    curl curl curl curl Debian Ubuntu Azure Linux Alpine
  • Medium 6.5
    CVE-2026-3784

    wrong proxy connection reuse with credentials

    curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.

    curl curl curl curl Debian Ubuntu Azure Linux Alpine
  • Medium 6.3
    CVE-2025-14017

    broken TLS options for threaded LDAPS

    When doing multi-threaded LDAPS transfers (LDAP over TLS) with libcurl, changing TLS options in one thread would inadvertently change them globally and therefore possibly also affect other concurrently setup transfers. Disabling certificate verification for a…

    curl curl curl curl Debian Ubuntu Azure Linux Alpine
  • Medium 5.9
    CVE-2025-13034

    No QUIC certificate pinning with GnuTLS

    When using `CURLOPT_PINNEDPUBLICKEY` option with libcurl or `--pinnedpubkey` with the curl tool, curl should check the public key of the server certificate to verify the peer. This check was skipped in a certain condition that would then make curl allow the c…

    curl curl curl curl Debian Ubuntu Alpine
  • Medium 5.3
    CVE-2025-10148

    predictable WebSocket mask

    curl's WebSocket code did not update the 32-bit mask pattern for each new outgoing frame as the specification says. Instead it used a fixed mask that persisted and was used throughout the entire connection. A predictable mask pattern allows for a malicious se…

    curl curl curl curl Debian Ubuntu Azure Linux Alpine
  • Medium 5.3
    CVE-2025-14524

    bearer token leak on cross-protocol redirect

    When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a cross-protocol redirect to a second URL that uses an IMAP, LDAP, POP3 or SMTP scheme, curl might wrongly pass on the bearer token to the new target host.

    curl curl curl curl Debian Ubuntu Azure Linux Alpine
  • Medium 5.3
    CVE-2025-14819

    OpenSSL partial chain store policy bypass

    When doing TLS related transfers with reused easy or multi handles and altering the `CURLSSLOPT_NO_PARTIALCHAIN` option, libcurl could accidentally reuse a CA store cached in memory for which the partial chain option was reversed. Contrary to the user's wishe…

    curl curl curl curl Debian Ubuntu Alpine
  • Medium 5.3
    CVE-2025-15079

    libssh global known_hosts override

    When doing SSH-based transfers using either SCP or SFTP, and setting the known_hosts file, libcurl could still mistakenly accept connecting to hosts *not present* in the specified file if they were added as recognized in the libssh *global* known_hosts file.

    curl curl curl curl Debian Ubuntu
  • Medium 5.3
    CVE-2026-3783

    token leak with redirect and netrc

    When an OAuth2 bearer token is used for an HTTP(S) transfer, and that transfer performs a redirect to a second URL, curl could leak that token to the second hostname under some circumstances. If the hostname that the first request is redirected to has informa…

    curl curl curl curl Debian Ubuntu Azure Linux Alpine
  • Medium 4.3
    CVE-2025-10966

    missing SFTP host verification with wolfSSH

    curl's code for managing SSH connections when SFTP was done using the wolfSSH powered backend was flawed and missed host verification mechanisms. This prevents curl from detecting MITM attackers and more.

    curl curl curl curl Debian Azure Linux Alpine
  • Low 3.1
    CVE-2025-15224

    libssh key passphrase bypass without agent set

    When doing SSH-based transfers using either SCP or SFTP, and asked to do public key authentication, curl would wrongly still ask and authenticate using a locally running SSH agent.

    curl curl curl curl Debian Ubuntu

References

  • article
    https://images.redhat.com/
  • report
    https://access.redhat.com/security/cve/CVE-2025-9086
  • article
    https://access.redhat.com/security/updates/classification/
  • report
    https://access.redhat.com/security/cve/CVE-2025-10148
  • report
    https://access.redhat.com/security/cve/CVE-2025-10966
  • report
    https://access.redhat.com/security/cve/CVE-2025-15224
  • report
    https://access.redhat.com/security/cve/CVE-2025-15079
  • report
    https://access.redhat.com/security/cve/CVE-2025-14819
  • report
    https://access.redhat.com/security/cve/CVE-2025-14524
  • report
    https://access.redhat.com/security/cve/CVE-2025-13034
  • report
    https://access.redhat.com/security/cve/CVE-2026-3805
  • report
    https://access.redhat.com/security/cve/CVE-2026-3783
  • report
    https://access.redhat.com/security/cve/CVE-2026-3784
  • report
    https://access.redhat.com/security/cve/CVE-2026-1965
  • report
    https://access.redhat.com/security/cve/CVE-2025-14017
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_6893.json
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2394750
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-9086
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-9086
  • article
    https://curl.se/docs/CVE-2025-9086.html
  • article
    https://curl.se/docs/CVE-2025-9086.json
  • article
    https://github.com/curl/curl/commit/c6ae07c6a541e0e96d0040afb6
  • article
    https://hackerone.com/reports/3294999
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2394749
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-10148
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-10148
  • article
    https://curl.se/docs/CVE-2025-10148.html
  • article
    https://curl.se/docs/CVE-2025-10148.json
  • article
    https://hackerone.com/reports/3330839
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2413308
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-10966
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-10966
  • article
    http://www.openwall.com/lists/oss-security/2025/11/05/2
  • article
    https://curl.se/docs/CVE-2025-10966.html
  • article
    https://curl.se/docs/CVE-2025-10966.json
  • article
    https://github.com/curl/curl/commit/b011e3fcfb06d6c027859
  • article
    https://hackerone.com/reports/3355218
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2426406
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-13034