RHSA-2026:55450: Important: curl security update

Published Aug 17, 2026
·
Updated

The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP.Security Fix(es): curl: libcurl: Improper certificate validation due to cached TLS settings reuse (CVE-2025-14819) curl: curl: Authentication bypass due to incorrect connection reuse with Negotiate authentication (CVE-2026-1965) curl: curl: Unauthorized access due to improper HTTP proxy connection reuse (CVE-2026-3784) curl: curl: Information disclosure via OAuth2 bearer token leakage during HTTP(S) redirect (CVE-2026-3783) curl: curl: Man-in-the-middle attack via SSH host key bypass (CVE-2026-9547) curl: curl: Insecure connection establishment due to TLS configuration mismatch (CVE-2026-8286) curl: curl: SSH host verification bypass when using schemeless URLs with SFTP/SCP (CVE-2026-12064) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected Software

32 affected componentsFixes available
redhat/curl<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl-debugsource<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-devel<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-minimal<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-minimal-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl-debugsource<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-devel<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-minimal<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-minimal-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl-debugsource<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-devel<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-minimal<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/libcurl-minimal-debuginfo<8.12.1-4.el10_2.3
8.12.1-4.el10_2.3
redhat/curl<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa
redhat/curl-debuginfo<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa
redhat/curl-debugsource<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa
redhat/libcurl<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa
redhat/libcurl-debuginfo<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa
redhat/libcurl-devel<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa
redhat/libcurl-minimal<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa
redhat/libcurl-minimal-debuginfo<8.12.1-4.el10_2.3.aa
8.12.1-4.el10_2.3.aa

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/curl to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  2. Upgrade

    Upgrade redhat/curl-debuginfo to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  3. Upgrade

    Upgrade redhat/curl-debugsource to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  4. Upgrade

    Upgrade redhat/libcurl to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  5. Upgrade

    Upgrade redhat/libcurl-debuginfo to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  6. Upgrade

    Upgrade redhat/libcurl-devel to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  7. Upgrade

    Upgrade redhat/libcurl-minimal to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  8. Upgrade

    Upgrade redhat/libcurl-minimal-debuginfo to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3
  9. Upgrade

    Upgrade redhat/curl to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  10. Upgrade

    Upgrade redhat/curl-debuginfo to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  11. Upgrade

    Upgrade redhat/curl-debugsource to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  12. Upgrade

    Upgrade redhat/libcurl to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  13. Upgrade

    Upgrade redhat/libcurl-debuginfo to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  14. Upgrade

    Upgrade redhat/libcurl-devel to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  15. Upgrade

    Upgrade redhat/libcurl-minimal to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  16. Upgrade

    Upgrade redhat/libcurl-minimal-debuginfo to a version that resolves this vulnerability.

    Fixed in 8.12.1-4.el10_2.3.aa
  17. Upgrade

    Upgrade curl to a version that resolves this vulnerability.

    Patch CVE-2026-1965
  18. Upgrade

    Upgrade curl to a version that resolves this vulnerability.

    Patch CVE-2026-3783
  19. Upgrade

    Upgrade curl to a version that resolves this vulnerability.

    Patch CVE-2026-8286
  20. Upgrade

    Upgrade curl to a version that resolves this vulnerability.

    Patch CVE-2026-9547
  21. Upgrade

    Upgrade curl to a version that resolves this vulnerability.

    Patch CVE-2026-12064
  22. Upgrade

    Upgrade curl to a version that resolves this vulnerability.

    Patch CVE-2026-3784
  23. Upgrade

    Upgrade curl to a version that resolves this vulnerability.

    Patch CVE-2025-14819

Event History

Aug 17, 2026
Advisory Published
via Red Hat·12:00 AM
Data Sourced
via Red Hat·12:00 AM
RemedyDescriptionAffected Software

Frequently Asked Questions

1

Which installed components should be considered in scope?

The advisory lists curl, libcurl, libcurl-minimal, libcurl-devel, and associated debuginfo and debugsource packages. Systems using either the curl command-line utility or applications linked against libcurl may be affected.

2

What security-sensitive uses of curl are implicated by these fixes?

The fixes cover certificate and TLS configuration validation, Negotiate authentication and HTTP proxy connection reuse, OAuth2 bearer tokens during HTTP(S) redirects, and SSH/SFTP/SCP host-key verification. Environments using these features should prioritize the update.

3

Are both command-line curl use and application integrations relevant?

Yes. Several issues are identified in libcurl, while others are identified in curl itself. Updating the listed curl and libcurl packages addresses both command-line use and software that relies on the library.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203