Issued:
2026-08-17
Updated:
2026-08-17

RHSA-2026:55450 - Important: curl security update

Synopsis

Important: curl security update

Type/Severity

Security Advisory: Important

Topic

An update for curl is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for x86_6410x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support10.2x86_64
Red Hat Enterprise Linux for x86_64 - Extended Life Cycle10.2x86_64
Red Hat Enterprise Linux for x86_64 - 4 years of updates10.2x86_64
Red Hat Enterprise Linux for Power, little endian10ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Update Support10.2ppc64le
Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle10.2ppc64le
Red Hat Enterprise Linux for Power, little endian - 4 years of support10.2ppc64le
Red Hat Enterprise Linux for IBM z Systems10s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support10.2s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle10.2s390x
Red Hat Enterprise Linux for IBM z Systems - 4 years of updates10.2s390x
Red Hat Enterprise Linux for ARM 6410aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support10.2aarch64
Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle10.2aarch64
Red Hat Enterprise Linux for ARM 64 - 4 years of updates10.2aarch64

Updated Packages

  • libcurl-debuginfo-8.12.1-4.el10_2.3.x86_64.rpm
  • libcurl-devel-8.12.1-4.el10_2.3.aarch64.rpm
  • libcurl-8.12.1-4.el10_2.3.s390x.rpm
  • libcurl-minimal-8.12.1-4.el10_2.3.s390x.rpm
  • libcurl-devel-8.12.1-4.el10_2.3.x86_64.rpm
  • curl-8.12.1-4.el10_2.3.s390x.rpm
  • libcurl-minimal-debuginfo-8.12.1-4.el10_2.3.ppc64le.rpm
  • curl-debugsource-8.12.1-4.el10_2.3.ppc64le.rpm
  • curl-debuginfo-8.12.1-4.el10_2.3.ppc64le.rpm
  • curl-debugsource-8.12.1-4.el10_2.3.s390x.rpm
  • libcurl-debuginfo-8.12.1-4.el10_2.3.aarch64.rpm
  • libcurl-debuginfo-8.12.1-4.el10_2.3.s390x.rpm
  • curl-8.12.1-4.el10_2.3.ppc64le.rpm
  • curl-debuginfo-8.12.1-4.el10_2.3.x86_64.rpm
  • curl-debuginfo-8.12.1-4.el10_2.3.s390x.rpm
  • curl-debugsource-8.12.1-4.el10_2.3.x86_64.rpm
  • libcurl-minimal-8.12.1-4.el10_2.3.x86_64.rpm
  • libcurl-minimal-debuginfo-8.12.1-4.el10_2.3.aarch64.rpm
  • libcurl-devel-8.12.1-4.el10_2.3.ppc64le.rpm
  • curl-8.12.1-4.el10_2.3.src.rpm
  • curl-8.12.1-4.el10_2.3.x86_64.rpm
  • libcurl-8.12.1-4.el10_2.3.aarch64.rpm
  • libcurl-minimal-8.12.1-4.el10_2.3.ppc64le.rpm
  • libcurl-devel-8.12.1-4.el10_2.3.s390x.rpm
  • libcurl-minimal-8.12.1-4.el10_2.3.aarch64.rpm
  • curl-8.12.1-4.el10_2.3.aarch64.rpm
  • libcurl-minimal-debuginfo-8.12.1-4.el10_2.3.s390x.rpm
  • curl-debuginfo-8.12.1-4.el10_2.3.aarch64.rpm
  • libcurl-8.12.1-4.el10_2.3.x86_64.rpm
  • curl-debugsource-8.12.1-4.el10_2.3.aarch64.rpm
  • libcurl-minimal-debuginfo-8.12.1-4.el10_2.3.x86_64.rpm
  • libcurl-debuginfo-8.12.1-4.el10_2.3.ppc64le.rpm
  • libcurl-8.12.1-4.el10_2.3.ppc64le.rpm

Fixes

CVEs

References

Additional information